Next-to-next-to-leading-order QCD corrections to chi(c0,2) -> gamma gamma

doi:http://dx.doi.org/10.1103/PhysRevD.94.111501

ITP OpenIR > SCI期刊论文

	Sang, WL; Feng, F; Jia, Y; Liang, SR; Sang, WL (reprint author), Southwest Univ, Sch 1 Phys Sci & Technol, Chongqing 400700, Peoples R China.; Sang, WL (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
	Next-to-next-to-leading-order QCD corrections to chi(c0,2) -> gamma gamma
发表期刊	PHYSICAL REVIEW D
语种	英语
摘要	We calculate the next-to-next-to-leading-order perturbative corrections to P-wave quarkonia annihilation decay to two photons, in the framework of nonrelativistic QCD factorization. The order-alpha(2)(s) short-distance coefficients associated with each helicity amplitude are presented in a semianalytic form, including the "light-by-light" contributions. With sizable next-to-next-to-leading-order corrections, we find a disquieting discrepancy when confronting our state-of-the-art predictions with the latest BESIII measurements, which especially fail to account for the measured chi(c2) -> gamma gamma width. Incorporating the effects of spin-dependent forces would even exacerbate the situation, since it lifts the degeneracy between the nonperturbative nonrelativistic QCD matrix elements of chi(c0) and chi(c2) toward the wrong direction. We also present the order-alpha(2)(s) predictions to chi(b2) -> gamma gamma, which await the future experimental test.
	2016
卷号	94 期号:11 页码:111501
学科领域	Astronomy & Astrophysics ; Physics
DOI	http://dx.doi.org/10.1103/PhysRevD.94.111501
收录类别	SCI
项目资助者	National Natural Science Foundation of China [11447031, 11605144, 11505285] ; National Natural Science Foundation of China [11447031, 11605144, 11505285] ; National Natural Science Foundation of China [11447031, 11605144, 11505285] ; National Natural Science Foundation of China [11447031, 11605144, 11505285] ; Natural Science Foundation of ChongQing [cstc2014jcyjA00029] ; Natural Science Foundation of ChongQing [cstc2014jcyjA00029] ; Natural Science Foundation of ChongQing [cstc2014jcyjA00029] ; Natural Science Foundation of ChongQing [cstc2014jcyjA00029] ; Fundamental Research Funds for the Central Universities [XDJK2016C067] ; Fundamental Research Funds for the Central Universities [XDJK2016C067] ; Fundamental Research Funds for the Central Universities [XDJK2016C067] ; Fundamental Research Funds for the Central Universities [XDJK2016C067] ; National Natural Science Foundation of China (CRC110 by DFG) [11475188, 11261130311, 11621131001] ; National Natural Science Foundation of China (CRC110 by DFG) [11475188, 11261130311, 11621131001] ; National Natural Science Foundation of China (CRC110 by DFG) [11475188, 11261130311, 11621131001] ; National Natural Science Foundation of China (CRC110 by DFG) [11475188, 11261130311, 11621131001] ; National Natural Science Foundation of China (NSFC) [11475188, 11261130311, 11621131001] ; National Natural Science Foundation of China (NSFC) [11475188, 11261130311, 11621131001] ; National Natural Science Foundation of China (NSFC) [11475188, 11261130311, 11621131001] ; National Natural Science Foundation of China (NSFC) [11475188, 11261130311, 11621131001] ; IHEP Innovation Grant [Y4545170Y2] ; IHEP Innovation Grant [Y4545170Y2] ; IHEP Innovation Grant [Y4545170Y2] ; IHEP Innovation Grant [Y4545170Y2] ; State Key Lab for Electronics and Particle Detectors ; State Key Lab for Electronics and Particle Detectors ; State Key Lab for Electronics and Particle Detectors ; State Key Lab for Electronics and Particle Detectors
引用统计	正在获取...
文献类型	期刊论文
条目标识符	http://ir.itp.ac.cn/handle/311006/21454
专题	SCI期刊论文
通讯作者	Sang, WL (reprint author), Southwest Univ, Sch 1 Phys Sci & Technol, Chongqing 400700, Peoples R China.; Sang, WL (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Sang, WL,Feng, F,Jia, Y,et al. Next-to-next-to-leading-order QCD corrections to chi(c0,2) -> gamma gamma[J]. PHYSICAL REVIEW D,2016,94(11):111501.
APA	Sang, WL,Feng, F,Jia, Y,Liang, SR,Sang, WL ,&Sang, WL .(2016).Next-to-next-to-leading-order QCD corrections to chi(c0,2) -> gamma gamma.PHYSICAL REVIEW D,94(11),111501.
MLA	Sang, WL,et al."Next-to-next-to-leading-order QCD corrections to chi(c0,2) -> gamma gamma".PHYSICAL REVIEW D 94.11(2016):111501.

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