Study of semileptonic B¯⁎→Pℓν¯ℓ decays

2016/06/22 by Qin Chang, Jie Zhu, Xiao-Lin Wang +5 · 1 citation
Physics and Astronomy · #Amplitude #Astrophysics #Asymmetry #Branching fraction #High-Energy Particle Collisions Research #Lepton #Luminosity #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/j.nuclphysb.2016.06.016

published as Nucl. Phys. B909 (2016) 921 · 18 pages, 2 figures

openalex publication_date 2016/06/22 · arxiv created 2016/06/29 · arxiv updated 2016/07/01 · openalex created_date 2016/07/22 · openalex updated_date 2026/08/05

Abstract

In anticipation of abundant B⁎ data samples at high-luminosity heavy-flavor experiments in the future, the tree-dominated semileptonic B¯u,d,s⁎→Pℓ−ν¯ℓ (P=D,Ds,π,K) decays are studied within the Standard Model. After a detailed calculation of the helicity amplitudes, the theoretical predictions for branching fraction (decay rate), lepton spin asymmetry, forward–backward asymmetry and ratio RD⁎(L) are firstly presented. It is found that the CKM-favored B¯⁎→Dℓ−ν¯ℓ decays have relatively large branching fractions of O(10−9)∼O(10−7), and are in the scope of running LHC and forthcoming SuperKEKB/Belle-II experiments.

Citations

• Diagnosing new physics inb→cτντdecays in the light of the recentBABARresult
• RadiativeB*→BγandD*→Dγdecays in light-cone QCD sum rules
• CP violation and the CKM matrix: assessing the impact of the asymmetric B factories
• Properties of orbitally excited heavy-light (Qq¯) mesons
• Implications of LHCb measurements and future prospects
• Weak Decays of ExcitedBMesons
• Evidence for an Excess ofB¯→D(*)τ−ν¯τDecays
• Big-Bang Nucleosynthesis
• Measurement of the branching ratio of B⁰ → D^*+ τ^- ν_τ relative to B⁰ → D^*+ ℓ^- ν_ℓ decays with a semileptonic tagging method
• Radiative transitions in heavy mesons in a relativistic quark model

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