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Literatura académica sobre el tema "Vector coupling"

Autor: Grafiati

Publicado: 1 de junio de 2024

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Artículos de revistas sobre el tema "Vector coupling"

Kiselev, Alexei D., Ali Ranim y Andrei V. Rybin. "Speed of Evolution and Correlations in Multi-Mode Bosonic Systems". Entropy 24, n.º 12 (5 de diciembre de 2022): 1774. http://dx.doi.org/10.3390/e24121774.

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We employ an exact solution of the thermal bath Lindblad master equation with the Liouvillian superoperator that takes into account both dynamic and environment-induced intermode couplings to study the speed of evolution and quantum speed limit (QSL) times of a open multi-mode bosonic system. The time-dependent QSL times are defined from quantum speed limits, giving upper bounds on the rate of change of two different measures of distinguishability: the fidelity of evolution and the Hilbert–Schmidt distance. For Gaussian states, we derive explicit expressions for the evolution speed and the QSL times. General analytical results are applied to the special case of a two-mode system where the intermode couplings can be characterized by two intermode coupling vectors: the frequency vector and the relaxation rate vector. For the system initially prepared in a two-mode squeezed state, dynamical regimes are generally determined by the intermode coupling vectors, the squeezing parameter and temperature. When the vectors are parallel, different regimes may be associated with the disentanglement time, which is found to be an increasing (a decreasing) function of the length of the relaxation vector when the squeezing parameter is below (above) its temperature-dependent critical value. Alternatively, we study dynamical regimes related to the long-time asymptotic behavior of the QSL times, which is characterized by linear time dependence with the proportionality coefficients defined as the long-time asymptotic ratios. These coefficients are evaluated as a function of the squeezing parameter at varying temperatures and relaxation vector lengths. We also discuss how the magnitude and orientation of the intermode coupling vectors influence the maximum speed of evolution and dynamics of the entropy and the mutual information.

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Hassanabadi, Hassan y Antonio Soares de Castro. "Bound States of Spinless Particles in a Short-Range Potential". Zeitschrift für Naturforschung A 70, n.º 4 (1 de abril de 2015): 245–49. http://dx.doi.org/10.1515/zna-2015-0025.

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AbstractWith a general mixing of vector and scalar couplings in a two-dimensional world, a short-range potential is used to explore certain features of the bound states of a spinless particle. Bound-state solutions are found in terms of the Gauss hypergeometric series when the potential parameters obey a certain constraint relation limiting the dosage of a vector coupling. The appearance of the Schiff–Snyder–Weinberg effect for a strong vector coupling and a short-range potential as well as its suppression by the addition of a scalar coupling is discussed.

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Kevrekidis, P. G. y D. E. Pelinovsky. "Discrete vector on-site vortices". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 462, n.º 2073 (4 de abril de 2006): 2671–94. http://dx.doi.org/10.1098/rspa.2006.1693.

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We study discrete vortices in coupled discrete nonlinear Schrödinger equations. We focus on the vortex cross configuration that has been experimentally observed in photorefractive crystals. Stability of the single-component vortex cross in the anti-continuum limit of small coupling between lattice nodes is proved. In the vector case, we consider two coupled configurations of vortex crosses, namely the charge-one vortex in one component coupled in the other component to either the charge-one vortex (forming a double-charge vortex) or the charge-negative-one vortex (forming a, so-called, hidden-charge vortex). We show that both vortex configurations are stable in the anti-continuum limit, if the parameter for the inter-component coupling is small and both of them are unstable when the coupling parameter is large. In the marginal case of the discrete two-dimensional Manakov system, the double-charge vortex is stable while the hidden-charge vortex is linearly unstable. Analytical predictions are corroborated with numerical observations that show good agreement near the anti-continuum limit, but gradually deviate for larger couplings between the lattice nodes.

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Krasnikov, N. V. "Implications of last NA64 results and the electron ge − 2 anomaly for the X(16.7) boson survival". Modern Physics Letters A 35, n.º 15 (12 de marzo de 2020): 2050116. http://dx.doi.org/10.1142/s0217732320501163.

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We point out that last NA64 bound on coupling constant of hypothetical X[Formula: see text](16.7 MeV) vector boson with electrons plus the recent value of the anomalous electron magnetic moment exclude at 90% C.L. purely vector or axial–vector couplings of X[Formula: see text](16.7) boson with electrons. Models with nonzero [Formula: see text] coupling constant with electron survive and they can explain both the electron and muon [Formula: see text] anomalies.

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Makri, Nancy. "Topological aspects of system-bath Hamiltonians and a vector model for multisite systems coupled to local, correlated, or common baths". Journal of Chemical Physics 158, n.º 14 (14 de abril de 2023): 144107. http://dx.doi.org/10.1063/5.0147135.

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Some topological features of multisite Hamiltonians consisting of harmonic potential surfaces with constant site-to-site couplings are discussed. Even in the absence of Duschinsky rotation, such a Hamiltonian assumes the system-bath form only if severe constraints exist. The simplest case of a common bath that couples to all sites is realized when the potential minima are collinear. The bath reorganization energy increases quadratically with site distance in this case. Another frequently encountered situation involves exciton-vibration coupling in molecular aggregates, where the intramolecular normal modes of the monomers give rise to local harmonic potentials. In this case, the reorganization energy accompanying excitation transfer is independent of site-to-site separation, thus this situation cannot be described by the usual system-bath Hamiltonian. A vector system-bath representation is introduced, which brings the exciton-vibration Hamiltonian in system-bath form. In this, the system vectors specify the locations of the potential minima, which in the case of identical monomers lie on the vertices of a regular polyhedron. By properly choosing the system vectors, it is possible to couple each bath to one or more sites and to specify the desired initial density. With a collinear choice of system vectors, the coupling reverts to the simple form of a common bath. The compact form of the vector system-bath coupling generalizes the dissipative tight-binding model to account for local, correlated, and common baths. The influence functional for the vector system-bath Hamiltonian is obtained in a compact and simple form.

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KIM, HYUN-CHUL, TIM LEDWIG y KLAUS GOEKE. "VECTOR AND AXIAL-VECTOR STRUCTURES OF THE Θ+". Modern Physics Letters A 23, n.º 27n30 (30 de septiembre de 2008): 2238–41. http://dx.doi.org/10.1142/s0217732308029101.

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We present in this talk recent results of the vector and axial-vector transitions of the nucleon to the pentaquark baryon Θ+, based on the SU(3) chiral quark-soliton model. The results are summarized as follows: K*NΘ vector and tensor coupling constants turn out to be gK*NΘ ≃ 0.81 and fK*NΘ ≃ 0.84, respectively, and the KNΘ axial-vector coupling constant to be [Formula: see text]. As a result, the total decay width for Θ+ → NK becomes very small: ΓΘ→NK ≃ 0.71 MeV , which is consistent with the DIANA result ΓΘ→NK = 0.36 ± 0.11 MeV .

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DELBOURGO, R. y M. D. SCADRON. "DYNAMICAL GENERATION OF THE GAUGED SU(2) LINEAR SIGMA MODEL". Modern Physics Letters A 10, n.º 03 (30 de enero de 1995): 251–66. http://dx.doi.org/10.1142/s0217732395000284.

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The fermion and meson sectors of the quark-level SU(2) linear sigma model are dynamically generated from a meson–quark Lagrangian, with the quark (q) and meson (σ, π) fields all treated as elementary, having neither bare masses nor expectation values. In the chiral limit, the masses are predicted to be mq = fπg, mπ = 0, mσ = 2mq, and we also find that the quark–meson coupling is [Formula: see text], the three-meson coupling is [Formula: see text] and the four-meson coupling is λ = 2g2 = g′/fπ, where fπ ≃ 90 MeV is the pion decay constant and Nc = 3 is the color number. By gauging this model one can generate the couplings to the vector mesons ρ and A1, including the quark–vector coupling constant gρ = 2π, gρππ, gA1ρπ and the masses mρ ~ 700 MeV, [Formula: see text]; of course the vector and axial currents remain conserved throughout.

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Jaminon, M. y R. Mendez-Galain. "Effect of the vector-axial-vector coupling on the vector-meson modes". Nuclear Physics A 564, n.º 4 (noviembre de 1993): 542–50. http://dx.doi.org/10.1016/0375-9474(93)90212-g.

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Lahiri, Amitabha. "Vector–Tensor Duality". Modern Physics Letters A 12, n.º 35 (20 de noviembre de 1997): 2699–705. http://dx.doi.org/10.1142/s0217732397002831.

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A dynamical non-Abelian two-form potential gives masses to vector bosons via a topological coupling.1 Unlike in the Abelian case, the two-form cannot be dualized to Goldstone bosons. Duality is restored by coupling a flat connection to the theory in a particular way, and the new action is then dualized to a nonlinear sigma model. The presence of the flat connection is crucial, which saves the original mechanism of Higgs-free topological mass generation from being dualized to a sigma model.

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Zhang, Hong-Yi y Siyang Ling. "Phenomenology of wavelike vector dark matter nonminimally coupled to gravity". Journal of Cosmology and Astroparticle Physics 2023, n.º 07 (1 de julio de 2023): 055. http://dx.doi.org/10.1088/1475-7516/2023/07/055.

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Abstract We study three astrophysical/cosmological consequences of nonminimal couplings to gravity in wavelike vector dark matter. In the nonrelativistic limit, the nonminimal coupling with the lowest mass dimension leads to effective self-interactions that affect the mass-radius relation of vector solitons, growth of linear perturbations during structure formation, and the speed of gravitational waves (GWs). Based on the success of cold dark matter on large-scale perturbations and the current limits on GW speed, we constrain the dark matter mass and nonminimal coupling strength to be within the range |ξ 1|/m 2 ≪ 1050 eV-2 and -3 × 1046 eV-2 ≲ ξ 2/m 2 ≲ 8 × 1048 eV-2.

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Tesis sobre el tema "Vector coupling"

Johansson, August. "Interlayer exchange coupling in Co/Pd-NiFe films studied by Vector Network Analyser Ferromagnetic Resonance". Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/interlayer-exchange-coupling-in-copdnife-films-studied-by-vector-network-analyser-ferromagnetic-resonance(cdb5170e-aa10-43ef-86c7-f61cf8a187f9).html.

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A greater understanding of precessional dynamics in magnetic systems is central to several emerging technologies. This thesis presents the design, construction and development of a Vector Network Analyser based Ferromagnetic Resonance measurement instrument (VNA-FMR), and its application in characterising dynamic material properties in hybrid anisotropy [CoPd]8-NiFe films, produced by remote plasma sputtering. Potential applications for hybrid films include Spin Torque Oscillators (STOs) or Vortex Oscillators (VO) for use as microwave emitters in, for example in Microwave Assisted Magnetic Recording (MAMR). The VNA-FMR system was first used to measure thin films of NiFe (permalloy) which allowed its capabilities to be quantified and compared to systems reported in the literature. The instrument demonstrated the capability of measuring permalloy films down to a thickness of 3 nm and was used to measure resonance and damping behaviour which agreed well with theory. The results obtained forMs were in agreement with measurement using Vibrating Sample Magnetometry. The effect of interlayer exchange on FMR was explored in hybrid films using a sample series with varying Pd spacer layer thickness, t, [Co/Pd]-Pd(t)-NiFe. As Pd spacer thickness increased, a transition was observed from near complete coupling with a single resonance mode to separate acoustic and optical branches of resonance. As spacing was further increased, the branches converged towards the resonances of the individual component layers of the hybrid films. The results suggest exchange coupling has a range of less than 2 nm, and is completely extinguished at 5 nm, in agreement with previous measurements. However, a change in damping behaviour was observed between 10 and 20 nm spacer thickness, independent of field orientation.

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Dupré, la Tour Marie-Alix. "Towards a Decarbonized Energy System in Europe in 2050 : Impact of Vector Coupling and Renewable Deployment Limits". Electronic Thesis or Diss., Paris, EHESS, 2023. http://www.theses.fr/2023EHES0014.

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Pour lutter contre le changement climatique, l'Europe s'est engagée à ce que son système énergétique soit décarboné d'ici 2050.Le système électrique présente un important potentiel de décarbonation. Il peut ainsi contribuer à la décarbonation d'autres vecteurs (hydrogène par exemple), qui auront donc tendance à s'électrifier davantage. Cette thèse s'est donc concentrée d’une part sur la décarbonation du système électrique, et d’autre part sur l'interaction entre les différents vecteurs énergétiques. La décarbonation du vecteur électrique reposera sur l'utilisation des énergies renouvelables. Or, les études qui évaluent leur potentiel obtiennent des valeurs très différentes. Dans le premier chapitre, à travers une revue systématique de la littérature des études de potentiel éolien et photovoltaïque en Europe, la variabilité de ces valeurs a été examinée. Ce chapitre montre que les limites surfaciques des potentiels ne sont pas restrictives, et la variabilité des valeurs est due à l'ajout de critères socio-politiques dans les calculs de potentiel. In fine, la limite au développement des énergies renouvelables ne sera pas la faisabilité technique mais la volonté politique et sociétale et les contraintes du secteur industriel, y compris la disponibilité des ressources naturelles nécessaires, comme les métaux par exemple. Dans un deuxième chapitre, le fonctionnement et les prix du système énergétique couplé, à capacités fixes, ont été étudiés. L'influence des couplages sur les prix des vecteurs énergétiques a été soulignée. En particulier, la flexibilité de la demande en gaz de synthèse (via l'électrolyse) pourrait fixer les prix de l'électricité sur une majorité des pas de temps de l'année. De plus, l’importance de la gestion saisonnière des stocks dans la formation des prix du gaz, et donc de l'électricité, a été mise en évidence. Par ailleurs, pour fonctionner de manière optimale, un tel système nécessite un haut niveau de coordination entre les vecteurs : les variantes qui dégradent la coordination montrent une augmentation significative des coûts d'exploitation du système énergétique. Enfin, un troisième chapitre a traité des conséquences des couplages énergétiques sur les besoins en flexibilité du système. Des variantes sur chaque vecteur ont été analysées à travers l'évaluation des besoins en flexibilité via des indicateurs sur plusieurs échelles de temps. En particulier, l'intérêt de la coordination entre les vecteurs a été confirmé : elle permet aussi d'éviter des investissements massifs
To address climate change, Europe is committed to a decarbonized energy system by 2050.The power system has a large potential for decarbonization. It can thus contribute to the decarbonization of other vectors (hydrogen for example), which will therefore tend to become more electrified. Therefore, this thesis has focused on the decarbonization of the power system on the one hand, and the interaction between the various energy vectors on the other.The decarbonization of the power vector will involve the use of renewable energies. However, the studies that evaluate their potential obtain very different values. In the first chapter, which consisted of a systematic literature review of wind and photovoltaic studies of potential in Europe, the variability of these values was examined. The areal limits of the potentials are not restrictive, and the variability of the values is due to the addition of socio-political criteria to the calculations of potential. Ultimately, the limit to the development of renewables will not be technical feasibility but political and societal will and limits of the industrial sector, including the availability of the necessary natural resources (metals, etc.).In a second chapter, the operation and prices of this coupled system with fixed capacities were studied. The influence of the couplings on the prices of the energy vectors was underlined. In particular, the flexibility of the demand for synthesis gas (via electrolysis) could set the electricity prices on a majority of the time steps of the year. The importance of seasonal stock management in the formation of gas prices, and therefore electricity prices, was highlighted. To operate optimally, such a system requires a high level of coordination between vectors. Variants that degrade coordination show a significant increase in the operating costs of the energy system.Finally, a third chapter addressed the consequences of energy couplings on the system flexibility requirements. Variants on each vector were analyzed through the evaluation of the flexibility needs based on indicators on several time scales. In particular, the interest of coordination between vectors was confirmed: it also avoids massive investments

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Sharkey, Kieran James. "An investigation of the running coupling and meson masses in lattice QCD". Thesis, University of Liverpool, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343926.

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Yeh, Wei-Hung. "Interaction of the focused laser beam with the grooved surface of optical disk: Evanescent coupling and vector diffraction effects". Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284281.

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The primary objective of this dissertation is to present a clear physical picture and useful insights of polarization effects in the diffraction of focused beams by grooved, multilayer-coated disks. The reading process of optical disk systems significantly relies on the reaction of the incident focused beam to the disk structure, may it be the groove profile or coating materials. The resulting complex-amplitude from diffraction is the main source for the readout signal. In the presence of the periodic pattern and the focused beam, however, different polarization states usually result in different complex-amplitudes. A good understanding of polarization effects in grooved multilayer disks is thus required for the optimum design of optical data storage systems. The pursuit of high-density recording inevitably drives the optical data storage industry to reduce the wavelength of light sources, decrease the track pitch of optical disks, and increase the numerical aperture of objective lenses. The track pitch and the size of the focused spot gradually approach the optical wavelength. Under these circumstances, the analysis of the interaction of focused beams with this type of high-frequency periodic disk using conventional scalar diffraction theory is no longer adequate. Only through vector diffraction study of polarization effects in the interaction of the focused beam with the periodic pattern can the characteristics of an optical disk system be fully understood and improved. Starting from the introduction of various polarization effects in optical disk systems and basic concepts of both scalar and vector diffraction theory, we then focus on the studies of diffraction patterns at the exit pupil of the objective lens and on the disk surface. Different behavior on the baseball pattern and in the effective groove depth is observed for the two polarization states. The use of the solid immersion lens to extensively increase the area density of optical disk systems prompts us to investigate the influence of evanescent-wave coupling on the near-field optical disk system. Finally, we study the feasibility of using a novel differential polarization microscope to reduce polarization effects and to increase the image contrast of magnetic domains on magneto-optical disks.

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Kerman, Solmaz Saime. "Scalar Meson Effects In Radiative Decays Of Vector Mesons". Phd thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/57968-0/index.pdf.

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The role of scalar mesons in radiative vector meson decays is investigated. The effects of scalar-isoscalar f_{0}(980) and scalar-isovector a_{0}(980) mesons are studied in the mechanism of the radiative Phi->
pi{+}pi{-}gamma and phi->
pi{0}eta gamma decays, respectively. A phenomenological approach is used to study the radiative phi->
pi{+}p{-}gamma decay by considering the contributions of sigma-meson, rho-meson and f_{0}-meson. The interference effects between different contributions are analyzed and the branching ratio for this decay is calculated. The radiative phi->
pi{0}eta gamma decay is studied within the framework of a phenomenological approach in which the contributions of rho-meson, chiral loop and a_{0}-meson are considered. The interference effects between different contributions are examined and the coupling constants g_{phi a_{0} gamma} and g_{a_{0}K{+}K{-}} are estimated using the experimental branching ratio for the phi->
pi{0}eta gamma decay. Furthermore, the radiative rho{0}pi{+}pi{-}gamma$ and rho{0}->
pi{0}pi{0}gamma decays are studied to investigate the role of scalar-isoscalar sigma-meson. The branching ratios of the rho{0}->
pi{+}pi{-}gamma and rho{0}->
pi{0}pi{0}gamma decays are calculated using a phenomenological approach by adding to the amplitude calculated within the framework of chiral perturbation theory and vector meson dominance the amplitude of sigma-meson intermediate state. In all the decays studied the scalar meson intermediate states make important contributions to the overall amplitude.

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Niro, Pierluigi. "Strong coupling in 2+1 dimensions from dualities, holography, and large N". Doctoral thesis, Universite Libre de Bruxelles, 2021. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/327659.

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The goal of the original research presented in this thesis is to study the strong coupling regime of Quantum Field Theories (QFTs) with different methods, making concrete predictions about the phase structure and the dynamics of these theories, and on their observables. The focus is on (gauge) field theories in three spacetime dimensions, which are an interesting laboratory to understand the properties of strong coupling in setups that are usually simpler than in the more familiar case of gauge theories in four dimensions. Importantly, topological effects play a relevant role in three dimensions, thanks to the presence of the so-called Chern-Simons term.The thesis contains a short introduction to QFTs in 3d, principles and applications of infrared dualities, large N techniques, and holography. Indeed, the web of infrared dualities, the large N expansion, and the holographic correspondence between QFT and gravity are the main tools which we use to investigate the strongly coupled regimes of 3d QFTs.Then, the original material is presented. In a first line of research, we focus on the study of the phase diagram of a 3d gauge theory making use of conjectured infrared dualities, extending such dualities to the case where more than one mass parameter can be dialed. In a second line of research, we study a class of 3d gauge theories by engineering their gravity dual in a string theory setup. We prove the existence of multiple phase transitions between phases characterized by both massless particles and topological sectors. In a third line of research, we use holography as a tool to explore the interplay between the physics of 4d QCD and 3d gauge theories. In particular, we analyze the properties of 3d domain walls, which appear as soliton-like solutions of 4d QCD in specific parametric regimes. Finally, we propose a boundary construction of 3d large N vector models, which appear as critical points of theories obtained by coupling degrees of freedom localized on a 3d boundary to a 4d bulk theory. This construction allows to prove new dualities and uncovers a new computational tool for 3d vector models.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished

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Kucukarslan, Ayse. "The Effects Of Rho-omega Mixing In Radiative Vector Meson Decays". Phd thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/2/1173129/index.pdf.

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Machet, Martina. "Higgs boson production in the diphoton decay channel with CMS at the LHC : first measurement of the inclusive cross section in 13 TeV pp collisions, and study of the Higgs coupling to electroweak vector bosons". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS254/document.

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Dans ce document deux analyses des propriétés du boson de Higgs se désintégrant en 2 photons dans l'expérience CMS située auprès du LHC (Large Hadron Collider) sont présentées.Le document commence par une introduction théorique sur le Modèle Standard et sur la physique du boson de Higgs, suivie par une description détaillée de l'expérience CMS. En deuxième lieu, les algorithmes de réconstruction et identification des photons sont présentés, avec une attention particulière aux différences entre le premier et le deuxième run du LHC, le premier run (Run1) ayant été pris entre 2010 et 2012 avec une énergie dans le centre de masse de 7 puis 8 TeV, le deuxième (Run2) ayant commencé en 2015 avec une énergie dans le centre de masse de 13 TeV. Les performances des reconstructions du Run 1 et du Run 2 en ce qui concerne l'identification des photons sont comparées. Ensuite l'algorithme d’identification des photons pour l'analyse H->γγ et optimisé pour le Run2 est présenté. Pour ce faire une méthode d'analyse multivariée est utilisée. Les performances de l'identification des photons à 13 TeV sont enfin étudiées et une validation donnée-simulation est effectuée.Ensuite l'analyse H->γγ avec les premières données du Run2 est présentée. Les données utilisées correspondent à une luminosité intégrée de 12.9 fb⁻¹. Une catégorisation des événements est faite, afin de rendre maximale la signification statistique du signal et d’étudier les différents modes de production du boson de Higgs. La signification statistique observée pour le boson de Higgs du Modèle Standard est 1.7 sigma, pour une signification attendue de 2.7 sigma.Enfin une étude de faisabilité ayant pour but de contraindre les couplages anomaux du boson de Higgs aux bosons de jauges est présentée. Pour cette analyse les données à 8 TeV collectées pendant le Run 1 du LHC, correspondant a' une luminosité intégrée de 19.5/fb sont utilisées. Cette analyse exploite la production du boson de Higgs par fusion de bosons-vecteurs (VBF), avec le Higgs se désintégrant ensuite en 2 photons. Les distributions cinématiques des jets et des photons, qui dépendent de l'hypothèse de spin-parité, sont utilisées pour construire des discriminants capables de séparer les différentes hypothèses de spin-parité. Ces discriminants permettent de définir différentes régions de l'espace des phases enrichies en signal de différentes spin-parité. Les différents nombres d’événements de signal sont extraits dans chaque région par un ajustement de la masse invariante diphoton, permettant de déterminer les contributions respectives des différents signaux et permettant ainsi de contraindre la production de boson de Higgs pseudo-scalaire (spin-parité 0-)
In this document two analyses of the properties of the Higgs boson in the diphoton decay channel with the CMS experiment at the LHC (Large Hadron Collider) are presented.The document starts with a theoretical introduction of the Standard Model and the Higgs boson physics, followed by a detailed description of the CMS detector.Then, photon reconstruction and identification algorithms are presented, with a particular focus on the differences between the first and the second run of the LHC, the first run (Run1) took place from 2010 to 2012 with a centre-of-mass energy of 7 and then 8 TeV, while the second run (Run2) started in 2015 with a centre-of-mass energy of 13 TeV. Performances of Run1 and Run2 reconstructions from the photon identification point of view are compared. Then the photon identification algorithm for the H->γγ analysis optimised for Run2 is presented. To do that a multivariate analysis method is used. Performances of the photon identification at 13 TeV are finally studied and a data-simulation validation is performed.Afterwards, the H->γγ analysis using the first Run2 data is presented. The analysis is performed with a dataset corresponding to an integrated luminosity of 2.7/fb. An event classification is performed to maximize signal significance and to studyspecific Higgs boson production modes. The observed significance for the standard model Higgs boson is 1.7 sigma, while a significance of 2.7 sigma is expected.Finally a feasibility study, having the aim of constraining the anomalous couplings of the Higgs boson to the vector bosons, is presented. This analysis is performed using the data collected at 8 TeV during Run1 at the LHC, corresponding to an integrated luminosity of 19.5/fb. This analysis exploits the production of the Higgs boson through vector boson fusion (VBF), with the Higgs decaying to 2 photons. The kinematic distributions of the dijet and diphoton systems, which depend from the spin-parity hypothesis, are used to build some discriminants able to discriminate between different spin-parity hypotheses. These discriminants allow to define different regions of the phase-space enriched with a certain spin-parity process. The Higgs boson signal yield is extracted in each region from a fit to the diphoton mass, allowing to determine the contributions of the different processes and then constrain the production of a pseudo-scalar (spin-parity 0-) Higgs boson

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Sekulla, Marco [Verfasser]. "Anomalous couplings, resonances and unitarity in vector boson scattering / Marco Sekulla". Siegen : Universitätsbibliothek der Universität Siegen, 2016. http://d-nb.info/1082426296/34.

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Kuss, Ingolf [Verfasser]. "Observability of Anomalous Couplings of Electroweak Vector-Bosons at the LHC and Improved Formulation of an Effective Vector-Boson Approximation / Ingolf Kuss". Bielefeld : Universitätsbibliothek Bielefeld, 1996. http://d-nb.info/1034401351/34.

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Más fuentes

Libros sobre el tema "Vector coupling"

N, Moskalev A. y Khersonskiĭ V. K, eds. Quantum theory of angular momentum: Irreducible tensors, spherical harmonics, vector coupling coefficients, 3nj symbols. Singapore: World Scientific Pub., 1988.

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N, Singnoi Werachone y United States. National Aeronautics and Space Administration., eds. An analysis of cross-coupling of a multi component jet engine test stand using finite element modeling techniques: Final report. Lawrence, Kan: University of Kansas, 1995.

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Mohammadi-Ivatloo, Behnam y Vahid Vahidinasab. Whole Energy Systems: Bridging the Gap Via Vector-Coupling Technologies. Springer International Publishing AG, 2021.

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Morawetz, Klaus. Kinetic Theory of Systems with SU(2) Structure. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198797241.003.0021.

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Systems with spin-orbit coupling and magnetic fields exhibit a SU(2) structure. Large classes of materials and couplings can be written into an effective spin-orbit coupled Hamiltonian with Pauli structure. Appropriate kinetic equations are derived keeping the quantum spinor structure. It results in coupled kinetic equations of scalar and vector distributions. The spin-orbit coupling, the magnetic field and the vector part of the selfenergy can be written in terms of an effective Zeeman field which couples both distributions. The currents and linear response are derived and the anomalous parts due to the coupling of the occurring band splitting are discussed. The response in magnetic fields reveals subtle retardation effects from which the classical and quantum Hall effect result as well as anomalous Hall effects. As application the dynamical conductivity of grapheme is successfully calculated and compared to the experiments.

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Nagaosa, N. Multiferroics. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198787075.003.0010.

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This chapter delves into the physics of multiferroics, the recent developments of which are discussed here from the viewpoint of the spin current and “emergent electromagnetism” for constrained systems. It presents the three sources of U(1) gauge fields, namely, the Berry phase associated with the noncollinear spin structure, the spin-orbit interaction (SOI), and the usual electromagnetic field. The chapter reviews multiferroic phenomena in noncollinear magnets from this viewpoint and discusses theories of multiferroic behavior of cycloidal helimagnets in terms of the spin current or vector spin chirality. Relativistic SOI leads to a coupling between the spin current and the electric polarization, and hence the ferroelectric and dielectric responses are a new and important probe for the spin states and their dynamical properties. Microscopic theories of the ground state polarization for various electronic configurations, collective modes including the electromagnon, and some predictions including photoinduced chirality switching are discussed with comparison to experimental results.

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Capítulos de libros sobre el tema "Vector coupling"

Li, Zeyu, Shiwei Tang y Shuicheng Yan. "Multi-Class SVM Classifier Based on Pairwise Coupling". En Pattern Recognition with Support Vector Machines, 321–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45665-1_25.

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Kastberg, Anders. "Coupling of Angular Momenta – The Vector Model". En Structure of Multielectron Atoms, 89–120. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36420-5_6.

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Li, Huaqing, Feihu Qi y Shaoyu Wang. "Improved Pairwise Coupling Support Vector Machines with Correcting Classifiers". En Lecture Notes in Computer Science, 454–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11579427_46.

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Li, Huaqing, Feihu Qi y Shaoyu Wang. "Face Recognition with Improved Pairwise Coupling Support Vector Machines". En Computational Intelligence and Bioinspired Systems, 927–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11494669_114.

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Schmieder, B. y E. Pariat. "Vector Magnetic Field in Emerging Flux Regions". En Magnetic Coupling between the Interior and Atmosphere of the Sun, 505–6. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02859-5_70.

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Gosain, S. y P. Venkatakrishnan. "Phase III of the USO Solar Vector Magnetograph". En Magnetic Coupling between the Interior and Atmosphere of the Sun, 395–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02859-5_38.

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Tegen, R. "Axial-Vector Weak Coupling Constant gA and Quark Confinement in Nucleons". En Weak and Electromagnetic Interactions in Nuclei, 548–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71689-8_105.

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Carter, G. W. y E. M. Henley. "Corrections to the nuclear axial vector coupling in a nuclear medium". En From Parity Violation to Hadronic Structure and more, 103. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-26345-4_23.

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Aremua, I., E. Baloïtcha y M. N. Hounkonnou. "Supersymmetric Vector Coherent States for Systems with Zeeman Coupling and Spin-Orbit Interactions". En Trends in Mathematics, 113–26. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18212-4_7.

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Deng, Xiujie. "SSMB Longitudinal Dynamics". En Springer Theses, 7–49. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-5800-9_2.

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AbstractIn this chapter, we study the single-particle longitudinal dynamics of SSMB. The motivation is to answer the question: how to realize the short bunch length and small longitudinal emittance in an electron storage ring, as required by SSMB? Note that the curvilinear (Frenet-Serret) coordinate system and the state vector $${\textbf {X}}=(x,x',y,'y',z,\delta )^{T}$$ X = ( x , x ′ , y , ′ y ′ , z , δ ) T , with $$^{T}$$ T representing the transpose, are used throughout this dissertation. For the longitudinal dynamics without coupling from the transverse dimension, what we can play are the momentum compaction and RF systems, for SSMB the laser modulators.

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Actas de conferencias sobre el tema "Vector coupling"

Godfrey, Stephen. "Quartic gauge boson coupling". En The International symposium on vector boson self-interactions. AIP, 1995. http://dx.doi.org/10.1063/1.49305.

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Valencia, G. "Experimental signatures of a parity violating anomalous coupling g Z5". En The International symposium on vector boson self-interactions. AIP, 1995. http://dx.doi.org/10.1063/1.49301.

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Fjellanger, J. P., O. Aanensen y B. O. Ruud. "Geophone Coupling and QC of Vector Fidelity". En 64th EAGE Conference & Exhibition. European Association of Geoscientists & Engineers, 2002. http://dx.doi.org/10.3997/2214-4609-pdb.5.e001.

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Luc, F., R. Dowle, P. Harvey y R. Khoo. "Calibrated Vector Fidelity and Coupling Matrix Measurements". En 65th EAGE Conference & Exhibition. European Association of Geoscientists & Engineers, 2003. http://dx.doi.org/10.3997/2214-4609-pdb.6.p102.

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Guibao, Wang, Tao Haihong, Su Jia, Guo Xiaolu, Zeng Cao y Wang Lanmei. "Mutual coupling calibration for electromagnetic vector sensor array". En 2012 10th International Symposium on Antennas, Propagation & EM Theory (ISAPE - 2012). IEEE, 2012. http://dx.doi.org/10.1109/isape.2012.6408759.

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Sivak, Sergey A., Mikhail E. Royak y Ilya M. Stupakov. "Coupling of Vector and Scalar Boundary Element Methods". En 2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE). IEEE, 2021. http://dx.doi.org/10.1109/apeie52976.2021.9647694.

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Foote, P. D., T. J. Hall, L. M. Connor y R. Jaura. "General vector theory of beam coupling in photorefractive media". En OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/oam.1985.thg8.

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The constraints of crystal symmetries in photorefractive media necessitate a general vector treatment of light scattering to explain fully the qualities of observed photorefractive effects. Commonly used photorefractive crystals1 are generally anisotropic (as is evident from their natural birefringence and electrooptic properties). Previous treatments of wave coupling phenomena in these materials have included the imposition of vector properties (by consideration of special cases of input beam polarization states and crystal orientations) on results from essentially scalar coupled wave theories. We report an approach to the beam coupling problem in which no such scalar field approximations are made. This work has revealed new results, supported by experiment, which do not arise from previous less general analyses.

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Schnepp, Johannes. "On the Thermodynamic Coupling in the Continuum Theory of Defects". En ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82821.

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The well established continuum theory of lattice defects is usually formulated in a three-dimensional material space. The defects are represented by differential geometric properties of the material manifold. Moving defects lead to differential geometric quantities changing with time. This motivates to augment the three space-like coordinates in the material space by a time-like coordinate to a four-dimensional manifold. The lattice vectors of a crystalline solid represent three space-like vectors in the material manifold. They can be completed to a tetrad field by a fourth time-like vector. The additional components of the tetrad are related to temperature and heat flux. The derivatives of the Lagrangian density for a hyper-elastic solid with respect to the components of the tetrad can be arranged in a four-dimensional second-order tensor in which entropy density and current are coupled to material momentum. The representation of entropy production leads to a Cattaneo type constitutive equation for heat transfer.

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Frei, F., R. Bloch y T. Feurer. "Space-Time Coupling in femtosecond scalar and vector pulse shaping". En International Conference on Ultrafast Phenomena. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/up.2010.the34.

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Petukhov, Aleksandr. "Measurements of quartic coupling and vector boson scattering in ATLAS". En 41st International Conference on High Energy physics. Trieste, Italy: Sissa Medialab, 2022. http://dx.doi.org/10.22323/1.414.1068.

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Informes sobre el tema "Vector coupling"

Liu, Zhanjiang John, Rex Dunham y Boaz Moav. Developmental and Evaluation of Advanced Expression Vectors with Both Enhanced Integration and Stable Expression for Transgenic Farmed Fish. United States Department of Agriculture, diciembre de 2001. http://dx.doi.org/10.32747/2001.7585196.bard.

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The objectives of the project were to develop expression vectors using the Sleeping Beauty transposon technology and the genetic border elements to provide both enhanced integration rate and stable transgene expression, and to evaluate the application of such vectors in farmed fish such as catfish and carp. The panel recommended adding the objective of evaluating the endogenous transposable elements, particularly in catfish, in order to evaluate the applicability of the expression vectors while reduc1ng efforts in real production of transgenic fish considering the focus of the project was to develop the vector and evaluation of its applicability, not producing transgenic fish. Efficient production of transgenic farmed fish is hindered by two major problems: mosaicism due to delayed integration after single-cell stage, and silencing of transgene expression. In this project, we proposed to combat these problems by coupling the Sleeping Beauty transposon technology that can enhance integration rate and the border elements that can insulate transgene from position effect. Our major objective was to develop a new generation of expression vector that contains both of these elements. We have developed expression vectors containing both the Sleeping Beauty transposon signals, inverted repeats and direct repeats (IR and DR, respectively), and the border elements, scs and scs'. Growth hormone minigene has been cloned into this vector for applications of such vectors in growth enhancement. Luc reporter gene has been also cloned into this vector cascades for relative easy evaluation of transgene expression. Transgenic fish have been produced using these expression vectors in both catfish (US) and carp (Israel). Much effort was also devoted to evaluation of the endogenous transposable elements in catfish as recommended by the BARD grant panel. Multiple families of Tcl-like transposons were identified from catfish. Surprisingly, many Tc I-related transcripts were identified. Among these transcripts, both the sense and antisense transcripts were present. Some of the transcripts may be useful for development of novel transposase-based technology for aquaculture applications in the future. This project has both scientific and aquaculture implications. First, to develop expression vectors containing both IR/DR and scs/scs' repeated elements have been reported being extremely technically difficult due to excision of the repeated sequences by the E. coli host during cloning processes. We have successfully constructed this advanced vector that contained very complex cascades for both gene integration and gene regulation. We have produced transgenic fish using such vectors. This advanced expression vector should be useful for production of transgenic fish. By simply replacing the growth hormone gene, any gene of interest can be readily inserted in this vector. Thus this vector should provide technological possibility for early integration and stable expression of any economically important genes in aquaculture. We have also evaluated the applications of the Sleeping Beauty-based vectors in terms of the impact of gene size and found that the size of trans gene drastically affects transposition. The system will be only useful for transferring genes smaller than 5.6 kb. We have also identified novel transposase-related transcripts that may be useful for the development of novel transposase-based technologies for general scientific research and for aquaculture applications.

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Green, Dan. Vector boson fusion and quartic boson couplings. Office of Scientific and Technical Information (OSTI), junio de 2003. http://dx.doi.org/10.2172/1155679.

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Bloom, Paul Craig. Investigation of Trilinear Vector Boson Couplings Through W Boson Pair Production in Dilepton Decay Channels. Office of Scientific and Technical Information (OSTI), marzo de 1998. http://dx.doi.org/10.2172/1369281.

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Dixon, Lance. Vector Boson Pair Production in Hadronic Collisions at Order alpha(s): Lepton Correlations and Anomalous Couplings. Office of Scientific and Technical Information (OSTI), julio de 1999. http://dx.doi.org/10.2172/10109.

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Christofek, Leonard Steven. Analysis of the Vector Boson Self Interaction and the Search for Anomalous Couplings at $\sqrt{s}$ = 1.8-TeV $p\overline{p}$ Collisions. Office of Scientific and Technical Information (OSTI), enero de 2001. http://dx.doi.org/10.2172/1421398.

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Askew, Andrew Warren. Measurement of the Wγ → μvγ Cross-Section, Limits on Anomalous Trilinear Vector Boson Couplings, and the Radiation Amplitude Zero in p$\bar{p}$ Collisions at √s = 1.96 TeV. Office of Scientific and Technical Information (OSTI), noviembre de 2004. http://dx.doi.org/10.2172/15011499.

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