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Добірка наукової літератури з теми "Transition form factors"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Transition form factors"

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Jakob, R., P. Kroll, and M. Raulfs. "Meson - photon transition form factors." Journal of Physics G: Nuclear and Particle Physics 22, no. 1 (January 1, 1996): 45–58. http://dx.doi.org/10.1088/0954-3899/22/1/004.

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2

Dubnicka, S., A. Z. Dubnickova, and A. Liptaj. "Pseudoscalar meson transition form factors." Progress in Particle and Nuclear Physics 67, no. 2 (April 2012): 418–23. http://dx.doi.org/10.1016/j.ppnp.2012.01.003.

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3

Dubničková, A. Z., S. Dubnička, G. Pancheri, and R. Pekárik. "Pseudoscalar meson transition form factors." Nuclear Physics B - Proceedings Supplements 126 (January 2004): 71–75. http://dx.doi.org/10.1016/s0920-5632(03)02310-7.

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4

Kalinovsky, Yu, K. L. Mitchell та C. D. Roberts. "Kℓ3 and πe3 transition form factors". Physics Letters B 399, № 1-2 (квітень 1997): 22–28. http://dx.doi.org/10.1016/s0370-2693(97)00271-2.

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5

Terschlüsen, C., and S. Leupold. "Electromagnetic transition form factors of mesons." Progress in Particle and Nuclear Physics 67, no. 2 (April 2012): 401–5. http://dx.doi.org/10.1016/j.ppnp.2011.12.051.

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6

Bando, Masako, and Masayasu Harada. "Axial anomaly and transition form factors." Physical Review D 49, no. 11 (June 1, 1994): 6096–100. http://dx.doi.org/10.1103/physrevd.49.6096.

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7

WU, Y. L. "WEAK TRANSITION FORM FACTORS IN RARE HEAVY MESON DECAYS." Modern Physics Letters A 06, no. 14 (May 10, 1991): 1277–84. http://dx.doi.org/10.1142/s0217732391001366.

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Анотація:
The transition form factors required for the rare heavy meson decays are evaluated. The model-independent absolutely normalized form factors, written in a compact form, among heavy to light and heavy to heavy meson transitions in the states such as 0−+→0−+, 1−, 0++, 1++ are given. A set of general relations among the form factors is obtained. The form factors involved in the rare B-meson decays are given as a direct application.
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8

Masjuan, Pere. "Pseudoscalar transition form factors from rational approximants." EPJ Web of Conferences 73 (2014): 03004. http://dx.doi.org/10.1051/epjconf/20147303004.

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9

Sanchez-Puertas, Pablo, та Pere Masjuan. "ηandη′ transition form factors from Padé approximants". EPJ Web of Conferences 81 (2014): 05025. http://dx.doi.org/10.1051/epjconf/20148105025.

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10

SCHNEIDER, SEBASTIAN P. "DISPERSION THEORY METHODS FOR TRANSITION FORM FACTORS." International Journal of Modern Physics: Conference Series 35 (January 2014): 1460461. http://dx.doi.org/10.1142/s201019451460461x.

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Dispersion-theoretical analyses of transition form factors are stepping stones to a model-independent determination of the light-by-light scattering contribution to (g - 2)μ. We extend a calculation of the conversion decays of the lightest isoscalar vector mesons, ω/ϕ → π0ℓ+ℓ-, that builds on a previous dispersive analysis of the ω/ϕ → 3π partial-wave amplitudes and the pion vector form factor as its sole ingredients. We construct a good parametrization of e+e- → 3π that, together with information on the anomalous process γπ → ππ, allows us to obtain a description of the π0 transition form factor measured in e+e- → π0γ.
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Дисертації з теми "Transition form factors"

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Vitos, Timea. "Electromagnetic form factors of the Sigma*-Lambda transition." Thesis, Uppsala universitet, Kärnfysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-392236.

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We introduce and examine the analytic properties of the three electromagnetic transition form factors of the Sigma*-Lambda hyperon transition. In the first part of the thesis, we discuss the interaction Lagrangian for the hyperons at hand. We calculate the decay rate of the Dalitz decay  Sigma* Lambda -> e+e- in the one-photon approximation in terms of the form factors, as well as the differential cross section of the scattering e+e- -> Sigma*bar Lambda in the one-photon approximation. In the second part of the thesis, we build up the machinery for calculation of the form factors using dispersion relations, performing an analytic continuation from the timelike, q2 > 0, to the spacelike, q2 < 0, region of the virtual photon invariant mass q2. Due to an anomalous cut in the triangle diagram arising from a two-pion saturation of the photon-hyperon vertex, there is an additional term in the dispersive integral. We use the scalar three-point function as a model for the examination of the dispersive approach with the anomalous cut. The one-loop diagram is calculated both directly and using dispersion relations. After comparison of the two methods, they are found to coincide when the anomalous contribution is added to the dispersive integral in the case of the octet Sigma exchange. By examination of the branch points of the logarithm in the discontinuity, we deduce the structure of the Riemann surface of the unitarity cut and present trajectories of the branch points. The result of our analysis of the analytic structure yields a correct dispersive relation for the electromagnetic transition form factors. This opens the way for the calculation of these form factors in the low-energy region for both space- and timelike q2. As an outlook, we present preliminary calculations for the hyperon-pion scattering amplitude using the unitarity and the anomalous contribution in a once-subtracted dispersion relation. Finally we present the corresponding preliminary unsubtracted dispersive calculations for the form factors.
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2

Sanchez-Puertas, Pablo [Verfasser]. "A theoretical study of meson transition form factors / Pablo Sanchez-Puertas." Mainz : Universitätsbibliothek Mainz, 2016. http://d-nb.info/1121819184/34.

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3

Poor, Jennifer L. "Nucleon axial vector form factors and electromagnetic transition amplitudes in perturbative QCD." W&M ScholarWorks, 1991. https://scholarworks.wm.edu/etd/1539623800.

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Values for the normal isovector axial vector form factor g$\sb{\rm A}$(Q$\sp2$) are calculated from the leading order perturbative QCD hard scattering amplitude and some previously reported models for the nucleon distribution amplitude, some of which have been derived from QCD sum rules. The values obtained from each of the distribution amplitudes gives a result that is consistent with the data extrapolated to high momentum transfer. The axial vector form factor is around one and one half times the proton's magnetic form factor in all the models which is also in accord with the data. We also calculate the isoscalar axial vector form factor G$\sbsp{\rm A}{\rm (S)}$(Q$\sp2$). Again we calculate the hard scattering amplitude to leading order in perturbative QCD and convolute that with various models for the nucleon distribution amplitude. There is no data at the present time with which to compare the resulting form factors; however, there is interest in knowing the value since the isoscalar axial vector form factor plays a role in some nonstandard weak interaction models. We find the result to be about half of that for the isovector axial vector form factor. The nucleon-delta electromagnetic transition amplitude is calculated using the same method as in the other cases. However, in this case, the hard scattering amplitude is known, and we use the method of QCD sum rules to develop a model for the delta distribution amplitude. We use these results with the same nucleon distribution amplitudes to get a value for the transition amplitude. We also carry out the same calculation for the lowest-lying negative parity states with both isospin one-half which corresponds to the S$\sb{11}$(1535) and isospin three halves. Compared to the results for the nucleon, the delta, and both the higher-mass negative parity cases are less asymmetric with the isospin three-halves states being consistent with the asymptotic form. The results for the nucleon-delta transition amplitude are found to be consistent with the available data as are the results for the nucleon-S$\sb{11}$(1535) transition amplitude.
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4

Barnett, Michael A. "Weak electron scattering for the 3He-3H transition and the weak nuclear form factors." FIU Digital Commons, 1995. http://digitalcommons.fiu.edu/etd/1398.

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We calculate the differential cross section for weak electron scattering reaction, e + 3He-' 3H + ve, for energies from 100 MeV to 6 GeV as a function of outgoing nucleus angle from 0 to n/2 radians. We find that the differential cross section at low [q2] increases with electron energy from 0.1 GeV to 6.0 GeV, such that the peak value at 6.0 GeV is approximately 3.2 x 10-40 cm 2 / ster, a factor of 10 larger than the peak value at 0.1 GeV. We also find that the width of the peak falls very rapidly with increasing electron energy. At high [q2] we find that the differential cross section falls by approximately three orders of magnitude making experimental observation at this time unlikely. The contributions of the individual form factors are obtained for electron energies of 0.5GeV and 2.0 GeV. It is found that at low [q2] the form factors, FA(q2) and Fv(q2), make contributions of similar size to the differential cross section and might be simultaneously determined , but for the case of FM(q2) we find that the contribution is too small to determine. It is also found that at large [q2] values, the contribution of FM(q2) is substantially enhanced , but that the cross section is probably too small to enable a direct determination of FM(q2).
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5

Jones, Gareth W. "Meson distribution amplitudes : applications to weak radiative B decays and в transition form factors". Thesis, Durham University, 2007. http://etheses.dur.ac.uk/2926/.

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This thesis examines the applications and determinations of meson light-cone distribution amplitudes, which enter the theoretical description of exclusive processes at large moment urn transfer. The investigation of such processes, in the context of в physics, provides one with a rich and extensive way of determining the Standard Model parameters of the CKM matrix, which are essential in describing CP violation, and searching for tell-tale signs of new physics beyond the Standard Model. We investigate the twist-2 and twist-3 distribution amplitudes of vector mesons and fully examine SU(3)(_F)-breaking effects and include leading G-parity violating terms. We use the conformal expansion allowing the distribution amplitudes to be described by a set of non-perturbative hadronic parameters which is reduced by invoking the QCD equation of motion to find various interrelations between the distribution amplitudes. Numerical values of the leading non-perturbative hadronie parameters are determined from QCD sum rules. The new distribution amplitude results find direct application in the radiative B decays to light vector mesons B → Vγ. We examine the phenomenologically most important observables in this decay mode using the formalism of QCD factorisation in which the distribution amplitudes play a vital role. We also include long-distance photon emission and soft quark loop effects, which formally lie outside the QCD factorisation formalism. The analysis encompasses all the relevant modes, that is B(_u),(_d)→(_p),(_w),K* and B(_s) → φ,K*.We also calculate the B → n(^1) transition form factor using QCD sum rules on the light- cone. The method relies on the collinear factorisation of the QCD dynamics into a pertur- batively calculable hard-scattering kernel and the non-perturbative universal distribution amplitudes. We include the singlet contribution originating from the U(1)a anomaly and bring the calculation consistently within the n-n(^1) mixing framework.
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6

Schneider, Sebastian [Verfasser]. "Analysis tools for precision studies of hadronic three-body decays and transition form factors / Sebastian Schneider." Bonn : Universitäts- und Landesbibliothek Bonn, 2013. http://d-nb.info/1044868813/34.

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7

Weil, Esther [Verfasser]. "Meson transition form factors and electromagnetic decays in the Dyson-Schwinger-approach / Esther Danielle Weil." Gießen : Universitätsbibliothek, 2020. http://d-nb.info/1210444658/34.

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Weil, Esther Danielle [Verfasser]. "Meson transition form factors and electromagnetic decays in the Dyson-Schwinger-approach / Esther Danielle Weil." Gießen : Universitätsbibliothek, 2020. http://d-nb.info/1210444658/34.

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Andrews, Deborah Marjorie. "What factors impact on transition for students leaving school at 16 and starting an A-level course at sixth-form college?" Thesis, University College London (University of London), 2004. http://discovery.ucl.ac.uk/10020476/.

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This is a case study focussing on a group of Year 12 students, October 2002 — June 2003, in a sixth-form college in a predominantly working-class area of Essex. The dynamic context is the sampled students' sense of their own progress, cross referenced with that of their teachers and parents. The issues under examination are the links between initial transition and the achievement of a sense of security and focus as the students embark on their AS studies. As part of the guinea-pig generation for SATS and Curriculum 2000, their educational journey has taken place within a time of flux and the study makes space to hear from them, as well as to counterpoint their 'narratives' within a wider setting of policy change. While the main reason that there has been so much more research on the transition from primary to secondary school is clearly that the size of the problem is far greater, another reason may be because the older student is considered less vulnerable to the effects of change. My research indicates that this may not be so. I maintain that the two stages are comparable in so far as wasted opportunities in transition can have detrimental effects on academic and personal fulfilment. I suggest three contexts that can be seen to impact on transition: the institution, the curriculum and government policy. In looking beyond the study, I argue that it is important to consider how far changes to these contexts which may arise out of reforms in education for fourteen to nineteen year olds, currently under discussion, are likely to affect transition for students in the future. I take an interpretevist, ethnographic approach, and reflect throughout on my position as a practitioner researcher, the implications of whose studies are lived out in front of her each teaching day.
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Drees, Reena Meijer. "Measurement of the π⁰ electromagnetic transition form factor". Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/30799.

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We present the result of a measurement of the π⁰ electromagnetic transition form factor in the time-like region of momentum transfer. From a data sample of roughly 100,000 π⁰ → e⁺ e⁻ γ decays, observed in the SINDRUM I magnetic spectrometer at the Paul Scherrer Institute (Switzerland), we measure a value of the form factor slope a = 0.02 ± 0.01 (stat) ± 0.02 (sys). This measurement is consistent with both the results of the recent measurement by CELLO (DESY) in the space-like region, and with the vector meson dominance prediction of a ≈ 0.03.
Science, Faculty of
Physics and Astronomy, Department of
Graduate
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Книги з теми "Transition form factors"

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Berihanova, Rumisa, and Inessa Minenko. Complex non-drug correction of menopausal disorders in patients with metabolic syndrome. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1599004.

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The monograph is devoted to the complex non-drug correction of menopausal disorders in patients with metabolic syndrome in the period of menopausal transition. Modern ideas about menopausal and metabolic syndromes are presented, a review of modern approaches to their treatment is carried out. A complex personalized system of non-drug correction of functional disorders in patients with metabolic syndrome and menopausal syndrome of mild and moderate severity in the period of menopausal transition is presented, including preformed therapeutic factors (vibrotherapy, chromotherapy, aeroionotherapy, musicotherapy (melotherapy), aromatherapy), physical therapy with pelvic floor muscle training, drinking balneotherapy, vitamins and minerals against the background of lifestyle modification. The algorithm of dynamic clinical and laboratory examination of women with menopausal disorders of mild and moderate severity and metabolic syndrome in the period of menopausal transition has been developed, including a general clinical examination, assessment of alimentary, thyroid, psycho-emotional, gynecological, urological statuses, the state of the intestinal microbiota, the function of the hypothalamic-pituitary complex, biochemical blood profile, hemostasis, levels of markers of inflammation, assessment of the state of the musculoskeletal system, sexual function, allowing to get an idea of the state of mental and physical health of patients, evaluate the effectiveness of the complex of measures, optimize therapeutic tactics. It is addressed to a wide range of readers interested in women's health. It can be useful for students, postgraduates, teachers of medical universities, obstetricians, gynecologists, endocrinologists, cardiologists, specialists of restorative medicine.
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2

Walter H. Shorenstein Asia-Pacific Research Center, ed. Aging Asia: The economic and social implications of rapid demographic change in China, Japan, and South Korea. Stanford, CA: Walter H. Shorenstein Asia-Pacific Research Center, 2010.

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3

Tiltman, Katherine Joan. Identifying factors that increase the likelihood of students making a successful transition from GCSE Science to GNVQ science in an inner city girls' school sixth form. 2002.

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4

David, Martin. Exnovation as a Necessary Factor in Successful Energy Transitions. Edited by Debra J. Davidson and Matthias Gross. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780190633851.013.31.

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This chapter strives toward a conceptual understanding of exnovation processes for energy transitions. Exnovation, the opposite of innovation, describes a process of divestment from fossil-fuel energy technologies and production structures. As an exemplifying case study, it discusses the exnovation of specific, unsustainable electricity production technologies in the face of the German energy transition. By looking at the interplay of politics, scientific modeling, and public involvement, it shows that exnovation is a necessary means for energy transitions but is hard to achieve. The chapter finds that more attention should be given to groups that bring exnovation to the energy transition agenda.
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5

Marshall, E. Anne, and Jennifer E. Symonds, eds. Young Adult Development at the School-to-Work Transition. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780190941512.001.0001.

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School-to-work (STW) pathways and transitions are key developmental processes in young adulthood. During this time, young adults face multiple choices and challenges. Young Adult Development at the School-to-Work Transition describes pathways for students to successfully transition to the work environment. The book examines social, economic, cultural, familial, contextual, and personal factors that shape the processes involved in the school-to-work transition. Internationally renowned scholars in the fields of developmental psychology, applied psychology, counseling, and sociology have contributed chapters focusing on theory, research, and application related to school-to-work and educational transitions. The book also gives attention to groups who have particular transition needs, including young adults with disabilities and special needs, cultural minorities, international students, and migrants.
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6

Schulenberg, John, Julie Maslowsky, and Justin Jager. Substance Use and Abuse During Adolescence and the Transition to Adulthood Are Developmental Phenomena. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190676001.003.0012.

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This chapter describes characteristics of a developmental perspective on substance use regarding age curves; heterogeneity in course; embeddedness within all else that is changing developmentally and historically; and a life course emphasis on distal upstream predictors and downstream consequences as well as more proximal developmental mechanisms and consequences, including transitions, turning points, and developmental disturbances. The chapter then describes the developmental and historical context of adolescence and the transition to adulthood, followed by a consideration of key conceptual issues related to developmental continuity, discontinuity, and transitions. Next, it examines implications for understanding risk and protective factors for, and consequences of, substance use during adolescence and the transition to adulthood. it concludes with a discussion of opportunities and challenges for future research.
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7

Heine, Steven. Transitions. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190637491.003.0002.

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Chapter 2 examines political factors and social influences that contributed to the construction of the Legend of Living Buddhas, a benchmark for the institutional and artistic shift from Chinese Chan to Japanese Zen. It aims to answer the question of how the Zen monastic institution managed to gain a wide following of religious leaders and their disciples as well as lay followers, especially Song-dynasty literati, after struggling for centuries to grow in China beginning with the historical background of the Tang dynasty. Stressing the commercial network of maritime routes linking China and Japan, along with cultural as well as commercial connections that inspired monks to make the daring trip across the waters, the chapter shows how transnational relationships formed between creative priests from both countries, particularly in regard to the mythology of Living Buddhas.
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8

Robles, Lora Colleen. The impact of environmental factors on homeless women and women with children in transitional shelters. 1995.

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9

Henriksen, Niels Engholm, and Flemming Yssing Hansen. Bimolecular Reactions, Transition-State Theory. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198805014.003.0006.

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This chapter discusses an approximate approach—transition-state theory—to the calculation of rate constants for bimolecular reactions. A reaction coordinate is identified from a normal-mode coordinate analysis of the activated complex, that is, the supermolecule on the saddle-point of the potential energy surface. Motion along this coordinate is treated by classical mechanics and recrossings of the saddle point from the product to the reactant side are neglected, leading to the result of conventional transition-state theory expressed in terms of relevant partition functions. Various alternative derivations are presented. Corrections that incorporate quantum mechanical tunnelling along the reaction coordinate are described. Tunnelling through an Eckart barrier is discussed and the approximate Wigner tunnelling correction factor is derived in the limit of a small degree of tunnelling. It concludes with applications of transition-state theory to, for example, the F + H2 reaction, and comparisons with results based on quasi-classical mechanics as well as exact quantum mechanics.
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Brophy, James M. The End of the Economic Old Order: the Great Transition, 1750–1860. Edited by Helmut Walser Smith. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780199237395.013.0008.

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This article focuses on economic history, the old order in German society, and the Great Economic Transition. The industrial ‘take-off’ of the 1840s and 1850s introduced a scale of production that forever changed the material conditions of Germany. The belching smokestacks of factories and locomotives might have tokened swift change, but the foundations for industrial capitalism were long in preparation. This article focuses on this long-term transition toward Germany's modern economy, examining how agriculture and market economies shaped the socioeconomic formations of proto-industrialization, urbanization, and industrialization. No one factor or sector suffices as an interpretive key to explain Germany's transformation. An analysis of the agrarian society, followed by urbanization and industrialization of the German society winds up this article.
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Частини книг з теми "Transition form factors"

1

Segovia, Jorge. "Elastic and Transition Form Factors in DSEs." In Light Cone 2015, 91–96. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50699-9_16.

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2

Blok, H. P., and J. H. Heisenberg. "Electron-Scattering Form Factors and Nuclear Transition Densities." In Computational Nuclear Physics 1, 190–205. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76356-4_10.

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3

Kamalov, S. S., and Shin Nan Yang. "The γ*N↔Δ Transition Form Factors." In Few-Body Problems in Physics ’99, 297–301. Vienna: Springer Vienna, 2000. http://dx.doi.org/10.1007/978-3-7091-6287-3_52.

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4

Roy, Ankhi. "Symmetry Breaking and transition form factors from η and ω decays." In SSP 2012, 257–61. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6485-9_34.

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Jung, Ju-Hyun, and Wolfgang Schweiger. "Pion-Cloud Contribution to the $$N\rightarrow \varDelta $$ Transition Form Factors." In Recent Progress in Few-Body Physics, 643–47. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-32357-8_101.

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Pace, E., G. Salmè, and A. Molochkov. "Baryon Elastic and Transition Form Factors with a Poincaré Covariant Current Operator." In Few-Body Problems in Physics ’02, 339–42. Vienna: Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-6728-1_78.

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Singh, Janardan P., and Shesha D. Patel. "Twist-Six Corrections to $$\eta \gamma $$ and $$\eta ^{'} \gamma $$ Transition Form Factors in QCD." In XXII DAE High Energy Physics Symposium, 79–82. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73171-1_16.

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8

Peña, M. T., and G. Ramalho. "Relativity in Few-Hadron Systems: Analysis of Baryon Electromagnetic Transition Form Factors in the Covariant Spectator Theory." In Recent Progress in Few-Body Physics, 715–22. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-32357-8_115.

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Lebedev, Vladimir S., and Israel L. Beigman. "Radiative Transitions and Form Factors." In Physics of Highly Excited Atoms and Ions, 39–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-72175-5_3.

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Berg, Jana. "Which Person Is Presumed to Fit the Institution? How Refugee Students’ and Practitioners’ Discursive Representations of Successful Applicants and Students Highlight Transition Barriers to German Higher Education." In European Higher Education Area: Challenges for a New Decade, 211–27. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56316-5_15.

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Abstract During recent years, German higher education institutions implemented a variety of support programs for refugees on their way to higher education. This newly highlighted questions of widening participation and informal as well as formal access barriers to higher education. This paper looks into discourses on successful students as a form of knowledge that implicitly highlights transition barriers to higher education. The qualitative study is based on expert interviews with teachers, program coordinators and student counsellors as well as interviews with prospective refugee students in a case study of a preparatory college (‘Studienkolleg’) and a university in a case study of one city in Germany. They are analysed using Keller’s (Forum qualitative Sozialforschung/Forum Qualitative Social Research 8(2), Art. 19:1–32, 2007) approach to discourse analysis. The paper describes personal, institutional and structural characteristics of ideal higher education transitions. Institutional presuppositions and assumptions about individual characteristics, the social organisation of time, academic practices and knowledges as well as discursively represented norms are discussed as crucial factors influencing higher education transitions. The paper ends with a working hypothesis on the influence of discourses on transitions and recommends that institutional settings should develop more awareness of and adapt to diverse applicants and students in order to widen access to higher education.
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Тези доповідей конференцій з теми "Transition form factors"

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Balakireva, Irina, Wolfgang Lucha, and Dmitri Melikhov. "Meson–photon transition form factors." In QCD@WORK 2012: International Workshop on Quantum Chromodynamics: Theory and Experiment. AIP, 2012. http://dx.doi.org/10.1063/1.4763505.

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MARIS, P. "MESON ELASTIC AND TRANSITION FORM FACTORS." In Exclusive Processes at High Momentum Transfer. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776211_0040.

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Klopot, Yaroslav, Armen Oganesian, and Oleg Teryaev. "Nonperturbative QCD and transition form factors." In XXI International Baldin Seminar on High Energy Physics Problems. Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.173.0036.

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Schadmand, Susan. "Electromagnetic Transition Form Factors of Light Mesons." In Proceedings of the 8th International Conference on Quarks and Nuclear Physics (QNP2018). Journal of the Physical Society of Japan, 2019. http://dx.doi.org/10.7566/jpscp.26.022001.

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Burkert, Volker D., Sigfrido Boffi, Claudio Ciofi degli Atti, Mauro Giannini, and Daniele Treleani. "Electromagnetic Transition Form Factors of Nucleon Resonances." In SIXTH INTERNATIONAL CONFERENCE ON PERSPECTIVES IN HADRONIC PHYSICS. AIP, 2008. http://dx.doi.org/10.1063/1.3013063.

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Schadmand, Susan. "Rare meson decays and transition form factors." In Sixth International Conference on Quarks and Nuclear Physics. Trieste, Italy: Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.157.0128.

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Gross, Franz, G. Ramalho, and M. T. Peña. "Nucleon and N-Delta Electromagnetic Transition Form Factors." In QUARK CONFINEMENT AND THE HADRON SPECTRUM VII: 7th Conference on Quark Confinement and the Hadron Spectrum - QCHS7. AIP, 2007. http://dx.doi.org/10.1063/1.2714467.

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Burkert, Volker D., Inna Aznauryan, and Marvin L. Marshak. "New Results on Nucleon Resonance Transition Form Factors." In 10TH CONFERENCE ON THE INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS. AIP, 2009. http://dx.doi.org/10.1063/1.3293954.

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Owen, Benjamin, Ahmed Bakry, Waseem Kamleh, Derek Leinweber, and Peter J. Moran. "Light Meson Transition Form Factors on the Lattice." In The 30th International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.164.0254.

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Ding, Minghui, Daniele Binosi, Khépani Raya, Lei Chang, and Craig D. Roberts. "Two photon transition form factors of neutral pseudoscalar mesons." In The 18th International Conference on Hadron Spectroscopy and Structure (HADRON2019). WORLD SCIENTIFIC, 2020. http://dx.doi.org/10.1142/9789811219313_0092.

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Звіти організацій з теми "Transition form factors"

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De Fazio, Fulvia, Thorsten Feldmann, and Tobias Hurth. SCET Sum Rules for B to P and B to V Transition Form Factors. Office of Scientific and Technical Information (OSTI), December 2007. http://dx.doi.org/10.2172/921292.

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Jessop, Colin P. Measurements of the Meson-Photon Transition Form Factors of Light Pseudoscalar Mesons at Large Momentum Transfer. Office of Scientific and Technical Information (OSTI), May 2003. http://dx.doi.org/10.2172/813069.

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Jessop, Colin P. Measurements of the Meson-Photon Transition Form Factors of Light Pseudoscalar Mesons at Large Momentum Transfer. Office of Scientific and Technical Information (OSTI), May 2003. http://dx.doi.org/10.2172/813123.

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Yılmaz, Fatih. Understanding the Dynamics of the Renewable Energy Transition: A Determinant Index Approach. King Abdullah Petroleum Studies and Research Center, February 2022. http://dx.doi.org/10.30573/ks--2021-mp03.

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Renewable energy is a key component of global energy transitions. To better identify its dynamics, this study constructs a composite index to measure countries’ renewable energy transition potential. Based on two decades of academic research, we identify 45 main enabling factors of the renewable energy transition. We classify these factors into seven subindices: economic factors, financial development, human capital, energy access, energy security, environmental sustainability and institutional infrastructure. We then aggregate the subindices into a composite index, which we call the renewable energy transition potential index. This index and its subindices are available for 149 countries for the period from 1990 to 2018.
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Avis, William. Armed Group Transition from Rebel to Government. Institute of Development Studies (IDS), October 2021. http://dx.doi.org/10.19088/k4d.2021.125.

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Governments and political parties with an armed history are not unusual, yet how these groups function during and after the transition from conflict has largely been ignored by the existing literature. Many former armed groups have assumed power in a variety of contexts. Whilst this process is often associated with brokered peace agreements that encourage former combatants to transform into political parties, mobilise voters, and ultimately stand for elections, this is not always the case. What is less clearly understood is how war termination by insurgent victory shapes patterns of post-war politics. This rapid literature review collates available evidence of transitions made by armed groups to government. The literature collated presents a mixed picture, with transitions mediated by an array of contextual factors that are location and group specific. Case studies are drawn from a range of contexts where armed groups have assumed some influence over government (these include those via negotiated settlement, victory and in contexts of ongoing protracted conflict). The review provides a series of readings and case studies that are of use in understanding how armed groups may transition in “post-conflict” settings.
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Breewood, Helen. What is the nutrition transition? Edited by Walter Fraanje and Tara Garnett. Food Climate Research Network, October 2018. http://dx.doi.org/10.56661/39a7336f.

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Changes in diet and lifestyle can be caused by many factors and can, in turn, cause changes in health. This building block explains what the nutrition transition is and its implications for health and environmental sustainability.
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Buchheit, Rudolph. Critical Factors for the Transition from Chromate to Chromate-Free Corrosion Protection. Fort Belvoir, VA: Defense Technical Information Center, June 2005. http://dx.doi.org/10.21236/ada446840.

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Buchheit, Rudolph G. Critical Factors for the Transition from Chromate to Chromate-Free Corrosion Protection. Fort Belvoir, VA: Defense Technical Information Center, December 1999. http://dx.doi.org/10.21236/ada379676.

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Greenwood, Jeremy, Nezih Guner, and Ricardo Marto. The Great Transition: Kuznets Facts for Family-Economists. Cambridge, MA: National Bureau of Economic Research, April 2021. http://dx.doi.org/10.3386/w28656.

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Parsons, Helen M., Hamdi I. Abdi, Victoria A. Nelson, Amy M. Claussen, Brittin L. Wagner, Karim T. Sadak, Peter B. Scal, Timothy J. Wilt, and Mary Butler. Transitions of Care From Pediatric to Adult Services for Children With Special Healthcare Needs. Agency for Healthcare Research and Quality (AHRQ), May 2022. http://dx.doi.org/10.23970/ahrqepccer255.

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Objective. To understand the evidence base for care interventions, implementation strategies, and between-provider communication tools among children with special healthcare needs (CSHCN) transitioning from pediatric to adult medical care services. Data sources. We searched Ovid MEDLINE, Ovid Embase, the Cochrane Central trials (CENTRAL) registry, and CINAHL to identify studies through September 10, 2021. We conducted grey literature searches to identify additional resources relevant to contextual questions. Review methods. Using a mixed-studies review approach, we searched for interventions or implementation strategies for transitioning CSHCN from pediatric to adult services. Two investigators screened abstracts and full-text articles of identified references for eligibility. Eligible studies included randomized controlled trials, quasi-experimental observational studies, and mixed-method studies of CSHCN, their families, caregivers, or healthcare providers. We extracted basic study information from all eligible studies and grouped interventions into categories based on disease conditions. We summarized basic study characteristics for included studies and outcomes for studies assessed as low to medium risk of bias using RoB-2. Results. We identified 9,549 unique references, 440 of which represented empirical research; of these, 154 (16 major disease categories) described or examined a care transition intervention with enough detail to potentially be eligible for inclusion in any of the Key Questions. Of these, 96 studies met comparator criteria to undergo risk of bias assessment; however only 9 studies were assessed as low or medium risk of bias and included in our analytic set. Low-strength evidence shows transition clinics may not improve hemoglobin A1C levels either at 12 or 24 months in youth with type 1 diabetes mellitus compared with youth who received usual care. For all other interventions and outcomes, the evidence was insufficient to draw meaningful conclusions because the uncertainty of evidence was too high. Some approaches to addressing barriers include dedicating time and resources to support transition planning, developing a workforce trained to care for the needs of this population, and creating structured processes and tools to facilitate the transition process. No globally accepted definition for effective transition of care from pediatric to adult services for CSHCN exists; definitions are often drawn from principles for transitions, encompassing a broad set of clinical aspects and other factors that influence care outcomes or promote continuity of care. There is also no single measure or set of measures consistently used to evaluate effectiveness of transitions of care. The literature identifies a limited number of available training and other implementation strategies focused on specific clinical specialties in targeted settings. No eligible studies measured the effectiveness of providing linguistically and culturally competent healthcare for CSHCN. Identified transition care training, and care interventions to
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