B_d,s → D^*_d,s V B ¯ d , s → D d , s ∗ V and B_d,s^* → D_d,s V B ¯ d , s ∗ → D d , s V decays in QCD factorization and possible puzzles

2016/05/31 by Qin Chang, Ling-Xin Chen, Yun-Yun Zhang +2 · 1 citation
Physics and Astronomy · #Amplitude #Branching fraction #Observable #Order (exchange) #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Scope (computer science) #hep-ex #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-016-4378-0

published as Eur.Phys.J. C76 (2016) no.10, 523 · 20 pages, 1 figure, 3 tables; revised version

openalex created_date 2016/06/24 · openalex publication_date 2016/09/26 · arxiv created 2016/10/10 · arxiv updated 2016/10/12 · openalex updated_date 2026/08/05

Abstract

Motivated by the rapid development of heavy-flavor experiments, phenomenological studies of nonleptonic B_d,s → D^*_d,s V and B_d,s^* → D_d,s V ( V=ρ ,K^* ) decays are performed within the framework of QCD factorization. Relative to the previous work, the QCD corrections to the transverse amplitudes are evaluated at next-to-leading order. The theoretical predictions of the observables are updated. For the measured B_d,s → D^*_d,s V decays, the tensions between theoretical results and experimental measurements, i.e. the “ R_ds^V puzzle” and “ D^* V (or R_V/ℓ ν _ℓ ) puzzle”, are presented after detailed analyses. For the B_d,s^* → D_d,s V decays, they have relatively large branching fractions of the order \gtrsim O(10^-9) and are in the scope of Belle-II and LHCb experiments. Moreover, they also provide a way to crosscheck the possible puzzles mentioned above through the similar ratios R_ds^{′ V} and R_V/ℓ ν _ℓ ^′ . More refined experimental measurements and theoretical efforts are required to confirm or refute such two anomalies.

Citations

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Cited by

• Study of the weak annihilation contributions in charmless \varvecB_s→ VV B s → V V decays