Next-to-Next-to-Leading-Order QCD Corrections to the Hadronic Width of Pseudoscalar Quarkonium

doi:10.1103/PhysRevLett.119.252001

	Next-to-Next-to-Leading-Order QCD Corrections to the Hadronic Width of Pseudoscalar Quarkonium
	Sang, Wen-Long; Feng F(冯锋); Jia Y(贾宇); Feng, Feng; Jia, Yu
刊名	PHYSICAL REVIEW LETTERS
	2017
卷号	119 期号:25 页码:252001
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.119.252001
文献子类	Article
英文摘要	We compute the next-to-next-to-leading-order QCD corrections to the hadronic decay rates of the pseudoscalar quarkonia, at the lowest order in velocity expansion. The validity of nonrelativistic QCD (NRQCD) factorization for inclusive quarkonium decay process, for the first time, is verified to relative order alpha(2)(s). As a by-product, the renormalization group equation of the leading NRQCD four-fermion operator O-1 (S-1(0)) is also deduced to this perturbative order. By incorporating this new piece of correction together with available relativistic corrections, we find that there exists severe tension between the state-of-the-art NRQCD predictions and the measured eta(c) hadronic width and, in particular, the branching fraction of eta(c) -> gamma gamma NRQCD appears to be capable of accounting for.b hadronic decay to a satisfactory degree, and our most refined prediction is Br (eta(b) -> gamma gamma) (4.8 +/- 0.7) x 10(-5).
电子版国际标准刊号	1079-7114
WOS关键词	B-C-MESON ; LEPTONIC DECAYS ; FEYNMAN ; ANNIHILATION ; AMPLITUDES ; PACKAGE
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000418382400003
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284627]
专题	高能物理研究所_理论物理室
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Sang, Wen-Long,Feng F,Jia Y,et al. Next-to-Next-to-Leading-Order QCD Corrections to the Hadronic Width of Pseudoscalar Quarkonium[J]. PHYSICAL REVIEW LETTERS,2017,119(25):252001.
APA	Sang, Wen-Long,冯锋,贾宇,Feng, Feng,&Jia, Yu.(2017).Next-to-Next-to-Leading-Order QCD Corrections to the Hadronic Width of Pseudoscalar Quarkonium.PHYSICAL REVIEW LETTERS,119(25),252001.
MLA	Sang, Wen-Long,et al."Next-to-Next-to-Leading-Order QCD Corrections to the Hadronic Width of Pseudoscalar Quarkonium".PHYSICAL REVIEW LETTERS 119.25(2017):252001.