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Title: Branching ratios, CP asymmetries and polarizations of $$B\rightarrow \psi (2S) V$$ decays

Abstract

We analyze the non-leptonic decays B/B s→ψ(2S)V with V=(ρ,ω,K*,Φ) by employing the perturbative QCD (pQCD) factorization approach. Here the branching ratios, the CP asymmetries and the complete set of polarization observables are investigated systematically. Besides the traditional contributions from the factorizable and non-factorizable diagrams at the leading order, the next-to-leading order (NLO) vertex corrections could also provide considerable contributions. The pQCD predictions for the branching ratios of the B (s)→ψ(2S)K*,ψ(2S) decays are consistent with the measured values within errors. As for B→ψ(2S)ρ,ψ(2S)ω decays, the branching ratios can reach the order of 10 –5 and could be measured in the LHCb and Belle-II experiments. The numerical results show that the direct CP asymmetries of the considered decays are very small. Thus the observation of any large direct CP asymmetry for these decays will be a signal for new physics. The mixing-induced CP asymmetries in the neutral modes are very close to sin2β (s), which suggests that these channels can give a cross-check on the measurement of the Cabbibo–Kobayashi–Maskawa (CKM) angle β and β s. We find that the longitudinal polarization fractions f 0 are suppressed to ~50% due to the large non-factorizable contributions. The magnitudes and phases of the two transversemore » amplitudes A∥ and A⊥ are roughly equal, which is an indication for the approximate light-quark helicity conservation in these decays. The overall polarization observables of B→ψ(2S)K* 0 and B s→ψ(2S)Φ channels are also in good agreement with the experimental measurements as reported by LHCb and BaBar. In conclusion, other results can also be tested by the LHCb and Belle-II experiments.« less

Authors:
 [1];  [2];  [2]
  1. North China Univ. of Science and Technology, Tangshan (China)
  2. Nanjing Normal Univ., Nanjing (China)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1398391
Grant/Contract Number:
GP201520; JP201512; A2014209308; 11235005; 11547020; 11605060; BJ2016041; AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 77; Journal Issue: 9; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Rui, Zhou, Li, Ya, and Xiao, Zhen -Jun. Branching ratios, CP asymmetries and polarizations of $B\rightarrow \psi (2S) V$ decays. United States: N. p., 2017. Web. doi:10.1140/epjc/s10052-017-5193-y.
Rui, Zhou, Li, Ya, & Xiao, Zhen -Jun. Branching ratios, CP asymmetries and polarizations of $B\rightarrow \psi (2S) V$ decays. United States. doi:10.1140/epjc/s10052-017-5193-y.
Rui, Zhou, Li, Ya, and Xiao, Zhen -Jun. 2017. "Branching ratios, CP asymmetries and polarizations of $B\rightarrow \psi (2S) V$ decays". United States. doi:10.1140/epjc/s10052-017-5193-y. https://www.osti.gov/servlets/purl/1398391.
@article{osti_1398391,
title = {Branching ratios, CP asymmetries and polarizations of $B\rightarrow \psi (2S) V$ decays},
author = {Rui, Zhou and Li, Ya and Xiao, Zhen -Jun},
abstractNote = {We analyze the non-leptonic decays B/Bs→ψ(2S)V with V=(ρ,ω,K*,Φ) by employing the perturbative QCD (pQCD) factorization approach. Here the branching ratios, the CP asymmetries and the complete set of polarization observables are investigated systematically. Besides the traditional contributions from the factorizable and non-factorizable diagrams at the leading order, the next-to-leading order (NLO) vertex corrections could also provide considerable contributions. The pQCD predictions for the branching ratios of the B(s)→ψ(2S)K*,ψ(2S) decays are consistent with the measured values within errors. As for B→ψ(2S)ρ,ψ(2S)ω decays, the branching ratios can reach the order of 10–5 and could be measured in the LHCb and Belle-II experiments. The numerical results show that the direct CP asymmetries of the considered decays are very small. Thus the observation of any large direct CP asymmetry for these decays will be a signal for new physics. The mixing-induced CP asymmetries in the neutral modes are very close to sin2β(s), which suggests that these channels can give a cross-check on the measurement of the Cabbibo–Kobayashi–Maskawa (CKM) angle β and βs. We find that the longitudinal polarization fractions f0 are suppressed to ~50% due to the large non-factorizable contributions. The magnitudes and phases of the two transverse amplitudes A∥ and A⊥ are roughly equal, which is an indication for the approximate light-quark helicity conservation in these decays. The overall polarization observables of B→ψ(2S)K*0 and Bs→ψ(2S)Φ channels are also in good agreement with the experimental measurements as reported by LHCb and BaBar. In conclusion, other results can also be tested by the LHCb and Belle-II experiments.},
doi = {10.1140/epjc/s10052-017-5193-y},
journal = {European Physical Journal. C, Particles and Fields},
number = 9,
volume = 77,
place = {United States},
year = 2017,
month = 9
}

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