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
学科分类Astronomy & Astrophysics; Physics
DOI10.1016/j.physletb.2015.07.044
文章类型Article
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.
类目[WOS]Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:000359146200063
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228650
专题中国科学院高能物理研究所_理论物理室_期刊论文
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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.
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