Semileptonic decays B/Bs → (D(), Ds())lvl in the PQCD approach with the lattice QCD input

被引：15

作者：

Hu Xue-Qing ^{[1
,2
]}

Jin Su-Ping ^{[1
,2
,3
]}

Xiao Zhen-Jun ^{[1
,2
,3
]}

机构：

[1] Nanjing Normal Univ, Dept Phys, Nanjing 210023, Peoples R China

[2] Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210023, Peoples R China

[3] Nanjing Normal Univ, Jiangsu Key Lab Numer Simulat Large Scale Complex, Nanjing 210023, Peoples R China

来源：

CHINESE PHYSICS C | 2020年 / 44卷 / 05期

基金：

中国国家自然科学基金;

关键词：

semileptonic decays; form factor; PQCD; B-s meson; MESON; NU;

D O I：

10.1088/1674-1137/44/5/053102

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We study the semileptonic B/B-s -> (D-(*), D-s((*)))lv(l) decays in the framework of the Standard Model (SM), by employing the perturbative QCD (PQCD) factorization formalism combined with the lattice QCD input for the relevant transition form factors. We calculate the branching ratios B(B-(s) -> D((s))((*))lv(l)) with l = (e, mu, tau), the ratios of the branching fractions R(D-(*)) and R(D-s((*))), and the physical observables P-tau(D-(s)((*))), F-L(D-(s)*) and A(FB)(tau). The "PQCD+Lattice" predictions for B(B -> D((*))lv(l)) and R(D-(*)) agree with the available experimental measurements within errors. For the ratios R(D-s) and R(D-s*), the "PQCD+Lattice" predictions agree with the other predictions. For P-tau(D*) and F-L(D*), our theoretical predictions agree with the measured values within errors. Our theoretical predictions of the semileptonic B/B-s decays considered could be tested in the near future by the LHCb and Belle II experiments.

引用

页数：14

共 75 条

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Semileptonic decays B/Bs → (D(*), Ds(*))lvl in the PQCD approach with the lattice QCD input

Semileptonic decays B/Bs → (D(), Ds())lvl in the PQCD approach with the lattice QCD input