Analysis of B&rarr;a1(1260)(b1(1235))K* decays in the perturbative QCD approach

ZHANG Zhi-Qing; FU Jian-Hua

doi:10.1088/1674-1137/39/3/033102

Chinese Physics C> 2015, Vol. 39> Issue(3) : 033102 DOI: 10.1088/1674-1137/39/3/033102

Analysis of B→a₁(1260)(b₁(1235))K^* decays in the perturbative QCD approach

ZHANG Zhi-Qing ^, ,
FU Jian-Hua

1.
Department of Physics, Henan University of Technology, Zhengzhou 450001, China

Abstract
HTML
Reference
Related

PDF

Abstract：
Within the framework of the perturbative quantum chromodynamics (PQCD) approach, we study the charmless two-body decays B→a₁(1260)K^*, b₁(1235)K^*. Using the decay constants and the light-cone distribution amplitudes for these mesons derived from the QCD sum rule method, we find the following results. (a) Our predictions for the branching ratios are consistent with the QCD factorization (QCDF) results within errors, but much larger than the naive factorization approach calculation values. (b) We predict that the anomalous polarizations occurring in the decays B→φK^*, ρ K^* also happen in B→a₁K^* decays, while they do not happen in B→b₁K^* decays. Here the contributions from the annihilation diagrams play an important role in explaining the larger transverse polarizations in the B→a₁K^* decays, while they are not sensitive to the polarizations for the B→b₁K^* decays. (c) Our predictions for the direct CP-asymmetries agree well with the QCDF results within errors. The decays B⁰→b₁⁺K^*-, B^-→b₁⁰K^*- have larger direct CP-asymmetries, which could be measured by the present LHCb experiment and the forthcoming Super-B experiment.

[1]	Ishtiaq Ahmed , Abdur Rehman . LHCb anomaly in B→K^*μ⁺μ^- optimised observables and potential of Z' model. Chinese Physics C, 2018, 42(6): 063103. doi: 10.1088/1674-1137/42/6/063103
[2]	Long-Ke Li , Ye-Qi Chen , Wen-Biao Yan , Zi-Ping Zhang . D⁰-D⁰ mixing sensitivity estimation at Belle Ⅱ in wrong-sign decays D⁰→K⁺π^-π⁰ via time-dependent amplitude analysis. Chinese Physics C, 2017, 41(2): 023001. doi: 10.1088/1674-1137/41/2/023001
[3]	Ai-Jun Ma , Ya Li , Wen-Fei Wang , Zhen-Jun Xiao . S-wave resonance contributions to B_(s)⁰→η_c(2S)π⁺π^-in the perturbative QCD factorization approach. Chinese Physics C, 2017, 41(8): 083105. doi: 10.1088/1674-1137/41/8/083105
[4]	Cai-Dian Lü , Faisal Munir , Qin Qin . b→ssd decay in Randall-Sundrum models. Chinese Physics C, 2017, 41(5): 053106. doi: 10.1088/1674-1137/41/5/053106
[5]	D. Banerjee , S. Sahoo . Analysis of λ_b→λ l⁺l^- rare decays in a non-universal Z' model. Chinese Physics C, 2017, 41(8): 083101. doi: 10.1088/1674-1137/41/8/083101
[6]	Xing-Dao Guo , Xue-Wen Liu , Hong-Wei Ke , Xue-Qian Li . Direct pion emission in D^*+→D⁺π decays. Chinese Physics C, 2016, 40(7): 073103. doi: 10.1088/1674-1137/40/7/073103
[7]	Wenyu Wang , Zhao-Hua Xiong , Xin-Yan Zhao . General scan in flavor parameter space in models with vector quark doublets and an enhancement in the B→X_sγ process. Chinese Physics C, 2016, 40(9): 093102. doi: 10.1088/1674-1137/40/9/093102
[8]	Ying Li , Dan-Dan Wang , Cai-Dian Lü . Pure annihilation type B→K0±(1430)K()^干 decays in the family non-universal Z0 model. Chinese Physics C, 2016, 40(1): 013101. doi: 10.1088/1674-1137/40/1/013101
[9]	WANG Dong , BAN Yong , LI Gang . ρ-ω mixing in J/ø→VP decays. Chinese Physics C, 2014, 38(6): 063101. doi: 10.1088/1674-1137/38/6/063101
[10]	CHENG Shan , FAN Ying-Ying , XIAO Zhen-Jun . B→Kη^(') decays in the SM with fourth generation fermions. Chinese Physics C, 2014, 38(7): 073102. doi: 10.1088/1674-1137/38/7/073102
[11]	ZOU Zhi-Tian , ZHOU Rui , LÜ Cai-Dian . Pure annihilation type decays B⁰→D_s^- K₂^*+ and B_s→Da₂ in perturbative QCD approach. Chinese Physics C, 2013, 37(1): 013103. doi: 10.1088/1674-1137/37/1/013103
[12]	WANG Wen-Fei , FAN Ying-Ying , XIAO Zhen-Jun . Semileptonic decays B_c→(η_c,J/Ψ)lv in the perturbative QCD approach. Chinese Physics C, 2013, 37(9): 093102. doi: 10.1088/1674-1137/37/9/093102
[13]	ZOU Zhi-Tian , LI Cheng , LÜ Cai-Dian . Pure annihilation type D→PP(V) decays in the perturbative QCD approach. Chinese Physics C, 2013, 37(9): 093101. doi: 10.1088/1674-1137/37/9/093101
[14]	YOU Fu-Yi , WANG Zhi-Gang , WAN Shao-Long . Analysis of (1/2)⁺ baryon states containing fourth-family quarks from QCD sum rules. Chinese Physics C, 2012, 36(6): 498-504 . doi: 10.1088/1674-1137/36/6/004
[15]	JIN Dan , YANG Ya-Dong . Radiative decays J/ψ → η^(')γ in perturbative QCD. Chinese Physics C, 2011, 35(8): 703-707. doi: 10.1088/1674-1137/35/8/001
[16]	LIU Xin , ZHANG Zhi-Qing , XIAO Zhen-Jun . B→(J/ψ,η_c) K decays in the perturbative QCD approach. Chinese Physics C, 2010, 34(7): 937-943. doi: 10.1088/1674-1137/34/7/002
[17]	Xing Zheng , Chen Xingqu , Wang Xiaochun . ΔI=2 Energy Staggering in Superdeformed Bands in ¹⁴⁹Gd(b1) and ¹⁵³Dy(b1). Chinese Physics C, 1997, 21(11): 1041-1045.
[18]	Xing Zheng , Chen Xingqu , Wang Xiaochun . △I=2 Energy Staggering in Superdeformed Bands in ¹⁴⁹Gd(b1) and ¹⁵³Dy(b1). Chinese Physics C, 1997, 21(S4): 87-92.
[19]	Yu Hong , Shen Qixing , Zhang Lin . Angular Distribution of Processes e⁺e^-→τ⁺τ^-,τ^-→a₁^-υ_τ,a₁^-→ρπ and Characteristics of a₁ Meson. Chinese Physics C, 1994, 18(S2): 141-150.
[20]	Yu Hong , Shen Qixing , Zhang Lin . Angular Distribution of Process e⁺e^－→τ⁺τ^－,τ^－→a₁υτ,a₁→ρπ and Characteristics of a₁ Meson. Chinese Physics C, 1994, 18(7): 583-590.

Access

Get Citation

ZHANG Zhi-Qing and FU Jian-Hua. Analysis of B→a₁(1260)(b₁(1235))K^* decays in the perturbative QCD approach[J]. Chinese Physics C, 2015, 39(3): 033102. doi: 10.1088/1674-1137/39/3/033102

ZHANG Zhi-Qing and FU Jian-Hua. Analysis of B→a₁(1260)(b₁(1235))K^* decays in the perturbative QCD approach[J]. Chinese Physics C, 2015, 39(3): 033102. doi: 10.1088/1674-1137/39/3/033102 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2014-04-01
Revised: 2014-08-14

Article Metric

Article Views(1543)
PDF Downloads(180)
Cited by(0)

Policy on re-use

To reuse of Open Access content published by CPC, for content published under the terms of the Creative Commons Attribution 3.0 license (“CC CY”), the users don’t need to request permission to copy, distribute and display the final published version of the article and to create derivative works, subject to appropriate attribution.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Analysis of B→a₁(1260)(b₁(1235))K^* decays in the perturbative QCD approach

Corresponding author: ZHANG Zhi-Qing,

1. Department of Physics, Henan University of Technology, Zhengzhou 450001, China

Received Date: 2014-04-01

Accepted Date: 2014-08-14

Available Online: 2015-03-05

Abstract: Within the framework of the perturbative quantum chromodynamics (PQCD) approach, we study the charmless two-body decays B→a₁(1260)K^*, b₁(1235)K^*. Using the decay constants and the light-cone distribution amplitudes for these mesons derived from the QCD sum rule method, we find the following results. (a) Our predictions for the branching ratios are consistent with the QCD factorization (QCDF) results within errors, but much larger than the naive factorization approach calculation values. (b) We predict that the anomalous polarizations occurring in the decays B→φK^*, ρ K^* also happen in B→a₁K^* decays, while they do not happen in B→b₁K^* decays. Here the contributions from the annihilation diagrams play an important role in explaining the larger transverse polarizations in the B→a₁K^* decays, while they are not sensitive to the polarizations for the B→b₁K^* decays. (c) Our predictions for the direct CP-asymmetries agree well with the QCDF results within errors. The decays B⁰→b₁⁺K^*-, B^-→b₁⁰K^*- have larger direct CP-asymmetries, which could be measured by the present LHCb experiment and the forthcoming Super-B experiment.

Analysis of B→a₁(1260)(b₁(1235))K^* decays in the perturbative QCD approach

Abstract：

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Analysis of B→a₁(1260)(b₁(1235))K^* decays in the perturbative QCD approach

Corresponding author: ZHANG Zhi-Qing,

HTML

目录