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Добірка наукової літератури з теми "Flavor-changing neutral currents"

Автор: Grafiati

Опубліковано: 21 вересня 2024

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Статті в журналах з теми "Flavor-changing neutral currents"

Cabarcas, J. M., D. Gómez Dumm, and R. Martinez. "Flavor-changing neutral currents in 331 models." Journal of Physics G: Nuclear and Particle Physics 37, no. 4 (February 11, 2010): 045001. http://dx.doi.org/10.1088/0954-3899/37/4/045001.

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Barroso, A. "Flavor-changing neutral currents with heavy quarks." Physical Review D 42, no. 3 (August 1, 1990): 901–4. http://dx.doi.org/10.1103/physrevd.42.901.

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Soares, J. M., and A. Barroso. "Renormalization of the flavor-changing neutral currents." Physical Review D 39, no. 7 (April 1, 1989): 1973–85. http://dx.doi.org/10.1103/physrevd.39.1973.

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Valencia, German. "Flavor changing neutral currents and a Z′." Hyperfine Interactions 214, no. 1-3 (January 30, 2013): 31–37. http://dx.doi.org/10.1007/s10751-013-0805-x.

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Shinohara, T. "Flavor Changing Neutral Currents in Universal Seesaw Model." Progress of Theoretical Physics 90, no. 5 (September 1, 1993): 1057–73. http://dx.doi.org/10.1143/ptp/90.5.1057.

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Freyberger, A., D. Gibaut, K. Kinoshita, P. Pomianowski, S. Schrenk, D. Cinabro, B. Barish, et al. "Limits on Flavor Changing Neutral Currents inD0Meson Decays." Physical Review Letters 77, no. 10 (September 2, 1996): 2147. http://dx.doi.org/10.1103/physrevlett.77.2147.

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Atwood, David, Laura Reina та Amarjit Soni. "Flavor Changing Neutral Scalar Currents atμ+μ−Colliders". Physical Review Letters 75, № 21 (20 листопада 1995): 3800–3803. http://dx.doi.org/10.1103/physrevlett.75.3800.

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Freyberger, A., D. Gibaut, K. Kinoshita, P. Pomianowski, S. Schrenk, D. Cinabro, B. Barish, et al. "Limits on Flavor Changing Neutral Currents inD0Meson Decays." Physical Review Letters 76, no. 17 (April 22, 1996): 3065–69. http://dx.doi.org/10.1103/physrevlett.76.3065.

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Appelquist, Thomas, Dimitra Karabali, and L. C. R. Wijewardhana. "Chiral Hierarchies and Flavor-Changing Neutral Currents in Hypercolor." Physical Review Letters 57, no. 8 (August 25, 1986): 957–60. http://dx.doi.org/10.1103/physrevlett.57.957.

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Wu, Dan-Di. "Flavor-changing neutral currents,CPviolation, and impure Majorana neutrinos." Physical Review D 56, no. 3 (August 1, 1997): 1522–27. http://dx.doi.org/10.1103/physrevd.56.1522.

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Більше джерел

Дисертації з теми "Flavor-changing neutral currents"

Walston, Sean Eric. "Heavy flavor decays of the Z⁰ and a search for flavor changing neutral currents /." wwwlib.umi.com/cr/uoregon/fullcit?p3136452 view abstract or download file of text, 2004.

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Thesis (Ph. D.)--University of Oregon, 2004.
Typescript. Includes vita and abstract. Includes bibliographical references (leaves 254-261). Also available for download via the World Wide Web; free to University of Oregon users.

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Poschenrieder, Anton. "The Littlest Higgs and its phenomenological implications for flavor changing neutral currents and lepton flavor violating processes." kostenfrei, 2007. http://mediatum2.ub.tum.de/doc/626143/626143.pdf.

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Plakias, Ioannis. "Probes of the Flavor Problem through Effective Theories." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP067.

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Анотація:

Dans cette thèse, nous étudions la possibilité de sonder des degrés de liberté lourds encore inconnus de la Nouvelle Physique par le biais de processus de basse énergie médiés par des courants neutres changeant la saveur. Nous les analysons dans le cadre des théories des champs effectives afin de tirer parti de la séparation des échelles d'énergie impliquées. Nous nous concentrons sur des processus du Modèle Standard qui ont déjà été observés et qui sont particulièrement sensibles aux effets de la Nouvelle Physique (b → s γ), ou sur des processus interdits dans le Modèle Standard dont l'observation serait un signe sans équivoque de Nouvelle Physique (Violation de la Saveur Leptonique). En ce qui concerne b → s γ, nous étudions les observables angulaires de B_s → φ ee à faible masse invariante ee, où le pôle du photon domine, dans le cadre de la théorie effective à basse énergie. En particulier, nous calculons les effets du mélange meson-antimeson (B_s) sur les observables angulaires, et étudions comment les observables supplémentaires induisent des contraintes projetées de la Nouvelle Physique sur les coefficients effectifs C_7 et C_7p décrivant la transition b → s γ. En ce qui concerne la Violation de la Saveur Leptonique, nous étudions les effets des équations de groupe de renormalisation dans le cadre de la Théorie Effective du Modèle Standard et de la théorie effective à basse énergie, et nous montrons qu'ils peuvent induire des contraintes strictes sur les opérateurs semi-leptoniques de la troisième génération de quarks à partir des processus de Violation de la Saveur Leptonique les plus contraignants, tels que μ N → e N, l → l_p γ, l → 3 l_p et l → l_p M où M est un méson vecteur ou pseudo-scalaire. De plus, nous illustrons la complémentarité entre les processus de Violation de la Saveur Leptonique à basse et haute énergie et, en particulier, nous montrons que les limites supérieures indirectes sur les désintégrations de mésons B Violant la Saveur Leptonique par le biais des contraintes du Grand collisionneur de hadrons (LHC) sur les processus de Drell-Yan Violant la Saveur Leptonique pp → l l_p peuvent être compétitives avec les mesures directes
In this thesis, we study the possibility of probing yet unknown heavy New Physics (NP) degrees of freedom through Flavor-Changing Neutral-Current (FCNC) processes at low energies. We analyze them within the framework of Effective Field Theories (EFTs) to exploit the separation of the energy scales involved. We focus on Standard Model (SM) processes which have already been observed and which are particularly sensitive to NP effects (b → s γ), or forbidden processes in the SM whose observation would be an unambiguous sign of NP (Lepton Flavor Violation or LFV). Regarding b → s γ, we study angular observables of B_s → φ ee at low ee invariant mass, where the photon pole dominates, within the framework of the Low-energy EFT (LEFT). In particular, we compute the effects of meson-antimeson (B_s) mixing on the angular observables, and study how the additional observables induce projected NP constraints on the effective coefficients C_7 and C_7p describing the b → s γ transition. Regarding LFV, we study Renormalization Group Equation (RGE) effects in the Standard Model EFT (SMEFT) and the LEFT, and we show that they can induce stringent constraints on semileptonic third-generation-quark operators from the most constraining LFV processes, such as μ N → e N, l → l_p γ, l → 3 l_p and l → l_p M where M is a vector or pseudoscalar meson. In addition, we illustrate the complementarity between low- and high-energy LFV processes, and, in particular, we show that indirect upper bounds on LFV B-meson decays through LHC constraints on LFV Drell-Yan processes pp → l l_p can be competitive with direct measurements

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Witchey, Nicholas James. "Search for flavor changing neutral current decays of charm mesons /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487935125882463.

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Turan, Ismail. "Flavor Changing Neutral Current Processes In The Framework Of The Two Higgs Doublet Model." Phd thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/717843/index.pdf.

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It is widely believed that the Standard Model (SM) can not be a fundamental theory of the basic interactions. Originated from this fact, many new physics models have been proposed. Among them, the two Higgs doublet model (2HDM), the SM enlarged by adding one extra scalar doublet, is considered as the simplest extension of the SM. In this work, within the framework of the model III version of the 2HDM, the exclusive decay the branching ratio is calculated and discussed in various physical regions determined by model parameters. It is observed that it is possible to reach present experimental upper limits in model Finally, the avor changing top quark decay,

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Shinohara, Satoshi. "Study of the KL→π⁰ννDecay at the J-PARC KOTO Experiment". Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/265175.

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Eygi, Zeynep Deniz. "The Standard Model Analyasis Of The Cp Violation In The Inclusive Semileptonic B-meson Decays." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12604712/index.pdf.

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Being a flavor changing neutral current process, inclusive semileptonic B- meson decays provide reliable testing grounds for the Standard Model at the loop level. They are also importanat in the CKM phenomology and investing the CP violation due to the existence of sizable interference terms in the decay amplitude. In this work , the rare inclusive semileptonic B- meson decays for (lepton is electron ,muon , tau) are investigated in the context of the Standard Model.The differential branching ratio, forward-backward asymmetry ,CP &ndash
violating asymmetry and CP &ndash
violating asymmetry in the forward-backward asymmetry in these processes are examined.The dependencies of these physical parameters on the Standard Model parametres are analyzed by paying a special attention to the long distance effects. Although the branching ratios predicted for the inclusive semileptonic B- meson decays are relatively small because of CKM suppression , it has been found that there is a significant ACP and ACP(AFB) for these processes.

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Acar, Hilal. "The Inclusive Semileptonic Decays Of The B-meson In A Cp Softly Broken Two Higgs Doublet Model." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604766/index.pdf.

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In this work, the B->
X_dell ell decays are examined in the context of a CP softly broken two Higgs doublet model. The differential branching ratio, forward-backward asymmetry, CP-violating asymmetry, CP-violating asymmetry in the forward-backward asymmetry and polarization asymmetries of the final lepton in this decay are studied. The dependencies of these physical parameters on the model parameters are analyzed by paying a special attention to the effects of neutral Higgs boson (NHB) exchanges and possible CP violating effects. It has been found that NHB effects are quite significant for the tau mode and the above-mentioned observables seems to be promising as a testing ground for new physics beyond the SM, especially for the existence of the CP-violating phase in the theory.

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Brost, Elizabeth. "Search for the Flavor-Changing Neutral Current in Top Pair Events in sqrt(s) = 8 TeV Proton-Proton Collisions at the Large Hadron Collider Using the ATLAS Detector." Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/20406.

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In this dissertation, a search for the flavor-changing neutral current in top-antitop events is presented. The flavor-changing neutral current is forbidden at tree level in the Standard Model and suppressed at higher order due to the GIM mechanism. In the Standard Model, the top quark is expected to decay to a W boson and a bottom quark nearly 100 percent of the time. While the Standard Model branching fractions for flavor-changing neutral currents in top decays are well beyond current experimental reach, there exist theoretical models which predict large enhancements to those branching fractions. Observation of the flavor-changing neutral current in top decays would be an unambiguous confirmation of new physics. This search was conducted in data from proton-proton collisions at the Large Hadron Collider, running at a center-of-mass energy of √s = 8 TeV, which were collected with the ATLAS detector in 2012. These data correspond to an integrated luminosity of 20.3 fb^-1. Candidate events include a lepton (electron or muon), a photon, at least two jets (one of which is b-tagged), and missing transverse energy. As no signal is observed, an observed (expected) upper limit on the branching ratio BR(t → qγ) of 0.063% (0.062%) is presented.

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Yilmaz, Umit Oktay. "The Polarization Properties Of The Final State Particles In The Rare Radiative B-meson Decay." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606100/index.pdf.

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A general analysis of the photon and lepton polarizations in the rare Bs &
#8594
&
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l+l- decay by using the most general model independent form of the effective Hamiltonian is presented. The total and the differential branching ratios for these decays, when photon is in the positive and negative helicity states, are studied. The sensitivity of "
photon polarization asymmetry"
and the longitudinal, transverse and normal polarization asymmetries of final state leptons, as well as lepton-antilepton combined asymmetries in Bs &
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&
#61543
l+l- decay to the new Wilson coefficients are also investigated. It is shown that all these physical observables are very sensitive to the existence of new physics beyond SM and their experimental measurements can give valuable information about it.

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Книги з теми "Flavor-changing neutral currents"

1933-, Cline D., ed. Proceedings of the Symposium on Flavor-Changing Neutral Currents: Present and Future Studies: Santa Monica, California, February 19-21, 1997. Singapore: World Scientific, 1997.

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Tsiskaridze, Shota. Search for Flavor-Changing Neutral Current Top Quark Decays t → Hq, with H → bb̅ , in pp Collisions at √s = 8 TeV with the ATLAS Detector. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63414-2.

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Cline, David. Proceedings of the Symposium on Flavor-Changing Neutral Currents: Present and Future Studies : Santa Monica, California February 19-21, 1997. World Scientific Publishing Company, 1998.

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Tsiskaridze, Shota. Search for Flavor-Changing Neutral Current Top Quark Decays t → Hq, with H → bb̅ , in pp Collisions at √s = 8 TeV with the ATLAS Detector. Springer, 2017.

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Tsiskaridze, Shota. Search for Flavor-Changing Neutral Current Top Quark Decays t → Hq, with H → bb̅ , in pp Collisions at √s = 8 TeV with the ATLAS Detector. Springer, 2018.

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Частини книг з теми "Flavor-changing neutral currents"

Valencia, German. "Flavor changing neutral currents and a Z′." In SSP 2012, 31–37. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6485-9_5.

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Glashow, Sheldon L. "Quark Families and Flavor — Changing Neutral Currents." In NATO ASI Series, 445–51. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1147-8_23.

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Richman, Jeffrey D. "Evidence for the Flavor-Changing Neutral Current Decays B → Kl+l− and B → K*l+l−." In Proceedings of the 31st International Conference on High Energy Physics Ichep 2002, 616–19. Elsevier, 2003. http://dx.doi.org/10.1016/b978-0-444-51343-4.50161-7.

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Тези доповідей конференцій з теми "Flavor-changing neutral currents"

Reina, Laura. "Flavor Changing Neutral Currents at." In The workshop on physics at the first muon collide r and at the front end of a muon collider. ASCE, 1998. http://dx.doi.org/10.1063/1.56225.

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Pakvasa, Sandip. "Flavor changing neutral currents: Then and now." In Discovery of weak neutral currents: the weak interaction before and after. AIP, 1994. http://dx.doi.org/10.1063/1.45438.

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Ito, Mark M. "Flavor changing neutral currents and K decay." In Discovery of weak neutral currents: the weak interaction before and after. AIP, 1994. http://dx.doi.org/10.1063/1.45437.

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AMANIK, P. S. "FLAVOR CHANGING NEUTRAL CURRENTS AND STELLAR COLLAPSE." In Open Issues in Core Collapse Supernova Theory. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812703446_0015.

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Cline, David B. "Flavor-Changing Neutral Currents: Present and Future Studies." In Symposium. WORLD SCIENTIFIC, 1998. http://dx.doi.org/10.1142/9789814529440.

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Amanik, Philip S. "Neutrino Flavor Changing Neutral Currents and Stellar Collapse." In ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology. AIP, 2006. http://dx.doi.org/10.1063/1.2234427.

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Wang, Dayong. "Searching for flavor changing neutral currents at BESIII." In The 39th International Conference on High Energy Physics. Trieste, Italy: Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.340.0479.

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Ali, A. "Flavor changing neutral current processes in B decays." In Discovery of weak neutral currents: the weak interaction before and after. AIP, 1994. http://dx.doi.org/10.1063/1.45439.

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Lim, C. S. "Theoretical Studies of Flavor-Changing Neutral Currents in 1980's." In 2009 KAON International Conference. Trieste, Italy: Sissa Medialab, 2010. http://dx.doi.org/10.22323/1.083.0001.

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Reina, L. "Signals from Flavor Changing Scalar Neutral Currents at μ+μ− colliders". У The 9th advanced ICFA beam dynamics workshop: Beam dynamics and technology issues for μ+μ− colliders. American Institute of Physics, 1996. http://dx.doi.org/10.1063/1.50913.

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Звіти організацій з теми "Flavor-changing neutral currents"

Jessop, Colin P. Limits on Flavor Changing Neutral Currents in D0 Meson Decays. Office of Scientific and Technical Information (OSTI), June 2003. http://dx.doi.org/10.2172/813222.

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Walston, S. Heavy Flavor Decays of the Z0 and a Search for Flavor Changing Neutral Currents. Office of Scientific and Technical Information (OSTI), June 2004. http://dx.doi.org/10.2172/827017.

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Jain, Supriya. Searches for flavor-changing neutral currents and single top quarks at D0. Office of Scientific and Technical Information (OSTI), May 2008. http://dx.doi.org/10.2172/932265.

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Greenlee, H. B. Search for the fourth generation charge -1/3 quark via flavor changing neutral currents. Office of Scientific and Technical Information (OSTI), August 1996. http://dx.doi.org/10.2172/618799.

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Pripstein, D. A. A search for flavor changing neutral currents and lepton family number violation in neutral two-body charm decays. Office of Scientific and Technical Information (OSTI), June 1997. http://dx.doi.org/10.2172/539968.

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Papaikonomou, Antonios. Search for Single Top-Quark Production via Flavor-Changing Neutral Currents with the CDF II Experiment. Office of Scientific and Technical Information (OSTI), June 2009. http://dx.doi.org/10.2172/1415804.

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Bellini, F. Flavor Changing Neutral Current B Decays at BaBar. Office of Scientific and Technical Information (OSTI), September 2004. http://dx.doi.org/10.2172/833042.

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Chen, C. Search for flavor-changing neutral current and Lepton-flavor violating decays of D{sup 0} --> {ell}{sup +} {ell}{sup -}. Office of Scientific and Technical Information (OSTI), August 2004. http://dx.doi.org/10.2172/829741.

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Gimmell, Jennifer Lindsay. Search for the Flavor Changing Neutral Current Decay t → Z q at √(s) = 1.96 TeV. Office of Scientific and Technical Information (OSTI), January 2009. http://dx.doi.org/10.2172/979713.

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Ryd, Anders. Evidence for the Flavor Changing Neutral Current Decays B->Kll and B->K*ll. Office of Scientific and Technical Information (OSTI), July 2002. http://dx.doi.org/10.2172/799971.

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