A possible solution to the B -> pi pi puzzle using the principle of maximum conformality

	A possible solution to the B -> pi pi puzzle using the principle of maximum conformality
	Qiao CF(乔从丰); Zhu RL(朱瑞林); Qiao, CF; Zhu, RL; Wu, XG; Brodsky, SJ
刊名	PHYSICS LETTERS B
	2015
卷号	748 页码:422-427
英文摘要	The measured B-d -> pi(0)pi(0) branching fraction deviates significantly from conventional QCD predictions, a puzzle which has persisted for more than 10 years. This may be a hint of new physics beyond the Standard Model; however, as we shall show in this paper, the pQCD prediction is highly sensitive to the choice of the renormalization scales which enter the decay amplitude. In the present paper, we show that the renormalization scale uncertainties for B -> pi pi can be greatly reduced by applying the Principle of Maximum Conformality (PMC), and more precise predictions for CP-averaged branching ratios B(B -> pi pi) can be achieved. Combining the errors in quadrature, we obtain B(B-d -> pi(0)pi(0))vertical bar(PMC) = (0.98(-0.31)(+0.44)) x 10(-6) by using the light-front holographic low-energy model for the running coupling. All of the CP-averaged B -> pi pi branching fractions predicted by the PMC are consistent with the Particle Data Group average values and the recent Belle data. Thus, the PMC provides a possible solution for the B-d -> pi(0)pi(0) puzzle. (C) 2015 The Authors. Published by Elsevier B.V.
学科主题	Astronomy & Astrophysics; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
收录类别	SCI
WOS记录号	WOS:000359146200063
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228650]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Qiao CF,Zhu RL,Qiao, CF,et al. A possible solution to the B -> pi pi puzzle using the principle of maximum conformality[J]. PHYSICS LETTERS B,2015,748:422-427.
APA	乔从丰,朱瑞林,Qiao, CF,Zhu, RL,Wu, XG,&Brodsky, SJ.(2015).A possible solution to the B -> pi pi puzzle using the principle of maximum conformality.PHYSICS LETTERS B,748,422-427.
MLA	乔从丰,et al."A possible solution to the B -> pi pi puzzle using the principle of maximum conformality".PHYSICS LETTERS B 748(2015):422-427.