Results 11 to 20 of about 106,372 (192)
From D s → γ in lattice QCD to B s → μμγ at high q 2
Journal of High Energy Physics, 2023 We use a recent lattice determination of the vector and axial D s → γ form factors at high squared momentum transfer q 2 to infer their B s → γ counterparts. To this end, we introduce a phenomenological approach summarized as follows.
Diego Guadagnoli +3 more
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Journal of High Energy Physics, 2023 This paper describes the angular distribution of Λ b 0 → Λ → p K − ℓ + ℓ − $$ {\Lambda}_b^0\to \Lambda \left(\to p{K}^{-}\right){\ell}^{+}{\ell}^{-} $$ decays. A full expression is given for the case of multiple interfering spin-states with spin ≤ 5 2 $$
A. Beck, T. Blake, M. Kreps
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Improved theory predictions and global analysis of exclusive b → sμ + μ − processes
Journal of High Energy Physics, 2022 We provide improved Standard Model theory predictions for the exclusive rare semimuonic processes B → K (*) μ + μ − and B s → ϕμ + μ − . Our results are based on a novel parametrization of the non-local form factors, which manifestly respects a recently ...
Nico Gubernari +3 more
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Zeitschrift für Physik C Particles and Fields, 1992 The experimental status of generation number violating muon and kaon decays is reviewed. We concentrate on three experiments with a large PSI contribution, neutrinoless muon-electron conversion, muonium-antimuonium conversion and the decay K+ --> pi+mu(e).
Walter, HK, Jungmann, K
openaire +2 more sources
Fingerprinting CP-violating New Physics with B → Kμ + μ −
Journal of High Energy Physics, 2023 The B → Kℓ + ℓ − system is particularly interesting to explore physics beyond the Standard Model. Such effects could provide new sources of CP violation, thereby giving rise to Wilson coefficients which could not only be real, as assumed in most analyses,
Robert Fleischer +3 more
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Complete analysis on QED corrections to B q → τ + τ −
Journal of High Energy Physics, 2023 Motivated by a dynamical enhancement of the electromagnetic corrections by a power of ΛQCD/m b in B d,s → μ + μ − at next-to-leading order (NLO), we extend the QED factorization effects on the leptonic B meson decays with light muon leptons to tauonic ...
Yong-Kang Huang +3 more
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Light-cone sum rules for S-wave B → Kπ form factors
Journal of High Energy Physics, 2023 We derive a set of light-cone sum rules relating the S-wave B → Kπ hadronic form factors to the B-meson light-cone distribution amplitudes (LCDAs), taking into account the complete set of LCDAs up to and including twist four. These results complement the
Sébastien Descotes-Genon +3 more
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Dispersive analysis of Λ b → Λ(1520) local form factors
Journal of High Energy Physics, 2023 We perform an analysis of Λ b → Λ(1520) local form factors. We use dispersive techniques to provide a model-independent parametrisation of the form factors that can be used in the whole kinematic region.
Yasmine Amhis +2 more
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Insights on the current semi-leptonic B-decay discrepancies — and how B s → μ + μ − γ can help
Journal of High Energy Physics, 2023 B s → μ + μ − γ, measured at high q 2 as a partially reconstructed decay, can probe the origin of the existing discrepancies in semi-leptonic b → s and b → c decays. We perform a complete study of this possibility.
Diego Guadagnoli +3 more
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Journal of High Energy Physics, 2023 Leptoquarks with masses between 2 TeV and 50 TeV are commonly invoked to explain deviations between data and Standard-Model (SM) predictions of several observables in the decays b → cτ ν ¯ $$ b\to c\tau \overline{\nu} $$ and b → sℓ + ℓ − with ℓ = e, μ ...
Marco Fedele +2 more
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