Charmless decays of the B-meson in perturbative QCD

	Charmless decays of the B-meson in perturbative QCD
	Guo, LB; Du DS(杜东生); Du, DS; Liu, LS
刊名	JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
	1999
卷号	25 期号:1 页码:1-10
其他题名	1
通讯作者	Guo, LB (reprint author), Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei Province, Peoples R China.
英文摘要	Using the perturbative QCD method and Chau's six-quark-graph scheme, we report a theoretical calculation of exclusive nonleptonic decays of the B meson into two light pseodoscalar mesons in the context of the low-energy effective Hamiltonian. The contributions from both tree-level and one-loop diagrams are taken into account. Under the approximation of neglecting light quark and light meson masses, we find that (i) within perturbative QCD there is no singularity which exists in the computation of spacelike penguin diagrams when the BSW model is used; (ii) the contributions from spacelike-type (W-annihilation, W-exchange, spacelike penguin and penguin-annihilation) graphs are strongly suppressed relative to those from timelike-type (external W-emission, internal W-emission and timelike penguin) ones; (iii) our results are well below the experimental upper limits but lower than the BSW ones.
学科主题	Physics
类目[WOS]	Physics, Nuclear ; Physics, Particles & Fields
收录类别	SCI
WOS记录号	WOS:000078446200001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225399]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Guo, LB,Du DS,Du, DS,et al. Charmless decays of the B-meson in perturbative QCD[J]. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,1999,25(1):1-10.
APA	Guo, LB,杜东生,Du, DS,&Liu, LS.(1999).Charmless decays of the B-meson in perturbative QCD.JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,25(1),1-10.
MLA	Guo, LB,et al."Charmless decays of the B-meson in perturbative QCD".JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS 25.1(1999):1-10.