Form-factor-independent test of lepton universality in semileptonic heavy meson and baryon decays; Physical Review D; Vol. 103, iss. 9
| Parent link: | Physical Review D: covering particles, fields, gravitation, and cosmology Vol. 103, iss. 9.— 2021.— [093001, 11 p.] |
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| מחבר תאגידי: | |
| מחברים אחרים: | , , , , , |
| סיכום: | Title screen In the semileptonic decays of heavy mesons and baryons, the lepton-mass dependence factors out in the quadratic cos2θ coefficient of the differential cosθ distribution. We call the corresponding normalized coefficient the convexity parameter. This observation opens the path to a test of lepton universality in semileptonic heavy meson and baryon decays that is independent of form-factor effects. By projecting out the quadratic rate coefficient, dividing out the lepton-mass-dependent factor, and restricting the phase space integration to the τ lepton phase space, one can define optimized partial rates which, in the Standard Model, are the same for all three (e,μ,τ) modes in a given semileptonic decay process. We discuss how the identity is spoiled by new physics effects. We discuss semileptonic heavy meson decays such as ¯B0→D(*)+ℓ−¯νℓ and B−c→J/ψ(ηc)ℓ−¯νℓ and semileptonic heavy baryon decays such as Λb→Λcℓ−¯νℓ for each ℓ=e, μ, τ. Режим доступа: по договору с организацией-держателем ресурса |
| שפה: | אנגלית |
| יצא לאור: |
2021
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| נושאים: | |
| גישה מקוונת: | https://doi.org/10.1103/PhysRevD.103.093001 |
| פורמט: | MixedMaterials אלקטרוני Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668026 |
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| 200 | 1 | |a Form-factor-independent test of lepton universality in semileptonic heavy meson and baryon decays |f S. Groote, M. A. Ivanov, J. D. Korner [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 44 tit.] | ||
| 330 | |a In the semileptonic decays of heavy mesons and baryons, the lepton-mass dependence factors out in the quadratic cos2θ coefficient of the differential cosθ distribution. We call the corresponding normalized coefficient the convexity parameter. This observation opens the path to a test of lepton universality in semileptonic heavy meson and baryon decays that is independent of form-factor effects. By projecting out the quadratic rate coefficient, dividing out the lepton-mass-dependent factor, and restricting the phase space integration to the τ lepton phase space, one can define optimized partial rates which, in the Standard Model, are the same for all three (e,μ,τ) modes in a given semileptonic decay process. We discuss how the identity is spoiled by new physics effects. We discuss semileptonic heavy meson decays such as ¯B0→D(*)+ℓ−¯νℓ and B−c→J/ψ(ηc)ℓ−¯νℓ and semileptonic heavy baryon decays such as Λb→Λcℓ−¯νℓ for each ℓ=e, μ, τ. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Physical Review D |o covering particles, fields, gravitation, and cosmology | ||
| 463 | |t Vol. 103, iss. 9 |v [093001, 11 p.] |d 2021 | ||
| 610 | 1 | |a электронный ресурс | |
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| 701 | 1 | |a Groote |b S. |g Stefan | |
| 701 | 1 | |a Ivanov |b M. A. |g Mikhail | |
| 701 | 1 | |a Korner |b J. D. |g Juergen | |
| 701 | 1 | |a Lyubovitskiy (Lyubovitskij) |b V. E. |c physicist |c Professor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences, Professor of the University of Tubingen (Germany) |f 1963- |g Valery Efimovich |3 (RuTPU)RU\TPU\pers\33385 |9 17080 | |
| 701 | 1 | |a Santorelli |b P. |g Pietro | |
| 701 | 0 | |a Tran Chien Thang | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Школа базовой инженерной подготовки |b Отделение математики и информатики |3 (RuTPU)RU\TPU\col\23555 |
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| 856 | 4 | |u https://doi.org/10.1103/PhysRevD.103.093001 | |
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