Study of Bs⟶ϕℓ+ℓ− Decays in the PQCD Factorization Approach with Lattice QCD Input

In this paper, we studied systematically the semileptonic decays Bs⟶ϕl+l− with l−=e−,μ−,τ− by using the perturbative QCD (PQCD) and the “PQCD+Lattice” factorization approach, respectively. We first evaluated all relevant form factors Fiq2 in the low-q2 region using the PQCD approach, and we also too...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Su-Ping Jin, Zhen-Jun Xiao
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/b1f928cc615e4a59af5243e5948fefa1
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:b1f928cc615e4a59af5243e5948fefa1
record_format	dspace
spelling	oai:doaj.org-article:b1f928cc615e4a59af5243e5948fefa12021-11-22T01:10:07ZStudy of Bs⟶ϕℓ+ℓ− Decays in the PQCD Factorization Approach with Lattice QCD Input1687-736510.1155/2021/3840623https://doaj.org/article/b1f928cc615e4a59af5243e5948fefa12021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/3840623https://doaj.org/toc/1687-7365In this paper, we studied systematically the semileptonic decays Bs⟶ϕl+l− with l−=e−,μ−,τ− by using the perturbative QCD (PQCD) and the “PQCD+Lattice” factorization approach, respectively. We first evaluated all relevant form factors Fiq2 in the low-q2 region using the PQCD approach, and we also took the available lattice QCD results at the high-q2 region as additional input to improve the extrapolation of Fiq2 from the low-q2 region to the endpoint qmax2. We then calculated the branching ratios and many other physical observables AFBl, FLϕ, S3,4,7, and A5,6,8,9 and the clean angular observables P1,2,3 and P4,5,6,8′. From our studies, we find the following points: (a) the PQCD and “PQCD+Lattice” predictions of BBs⟶ϕμ+μ− are about 7×10−7, which agree well with the LHCb measured values and the QCD sum rule prediction within still large errors; (b) we defined and calculated the ratios of the branching ratios Rϕeμ and Rϕμτ; (c) the PQCD and “PQCD+Lattice” predictions of the longitudinal polarization FL, the CP-averaged angular coefficients S3,4,7, and the CP asymmetry angular coefficients A5,6,8,9 agree with the LHCb measurements in all considered bins within the still large experimental errors; and (d) for those currently still unknown observables Rϕeμ,Rϕμτ,AFBl,P1,2,3, and P4,5,6,8′, we suggest LHCb and Belle-II Collaboration to measure them in their experiments.Su-Ping JinZhen-Jun XiaoHindawi LimitedarticlePhysicsQC1-999ENAdvances in High Energy Physics, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Su-Ping Jin Zhen-Jun Xiao Study of Bs⟶ϕℓ+ℓ− Decays in the PQCD Factorization Approach with Lattice QCD Input
description	In this paper, we studied systematically the semileptonic decays Bs⟶ϕl+l− with l−=e−,μ−,τ− by using the perturbative QCD (PQCD) and the “PQCD+Lattice” factorization approach, respectively. We first evaluated all relevant form factors Fiq2 in the low-q2 region using the PQCD approach, and we also took the available lattice QCD results at the high-q2 region as additional input to improve the extrapolation of Fiq2 from the low-q2 region to the endpoint qmax2. We then calculated the branching ratios and many other physical observables AFBl, FLϕ, S3,4,7, and A5,6,8,9 and the clean angular observables P1,2,3 and P4,5,6,8′. From our studies, we find the following points: (a) the PQCD and “PQCD+Lattice” predictions of BBs⟶ϕμ+μ− are about 7×10−7, which agree well with the LHCb measured values and the QCD sum rule prediction within still large errors; (b) we defined and calculated the ratios of the branching ratios Rϕeμ and Rϕμτ; (c) the PQCD and “PQCD+Lattice” predictions of the longitudinal polarization FL, the CP-averaged angular coefficients S3,4,7, and the CP asymmetry angular coefficients A5,6,8,9 agree with the LHCb measurements in all considered bins within the still large experimental errors; and (d) for those currently still unknown observables Rϕeμ,Rϕμτ,AFBl,P1,2,3, and P4,5,6,8′, we suggest LHCb and Belle-II Collaboration to measure them in their experiments.
format	article
author	Su-Ping Jin Zhen-Jun Xiao
author_facet	Su-Ping Jin Zhen-Jun Xiao
author_sort	Su-Ping Jin
title	Study of Bs⟶ϕℓ+ℓ− Decays in the PQCD Factorization Approach with Lattice QCD Input
title_short	Study of Bs⟶ϕℓ+ℓ− Decays in the PQCD Factorization Approach with Lattice QCD Input
title_full	Study of Bs⟶ϕℓ+ℓ− Decays in the PQCD Factorization Approach with Lattice QCD Input
title_fullStr	Study of Bs⟶ϕℓ+ℓ− Decays in the PQCD Factorization Approach with Lattice QCD Input
title_full_unstemmed	Study of Bs⟶ϕℓ+ℓ− Decays in the PQCD Factorization Approach with Lattice QCD Input
title_sort	study of bs⟶ϕℓ+ℓ− decays in the pqcd factorization approach with lattice qcd input
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/b1f928cc615e4a59af5243e5948fefa1
work_keys_str_mv	AT supingjin studyofbsphlldecaysinthepqcdfactorizationapproachwithlatticeqcdinput AT zhenjunxiao studyofbsphlldecaysinthepqcdfactorizationapproachwithlatticeqcdinput
_version_	1718418418789515264

Study of Bs⟶ϕℓ+ℓ− Decays in the PQCD Factorization Approach with Lattice QCD Input

Ejemplares similares