Improved estimates of the pion-photon transition form factor in the (1 <= Q(2) <= 5) GeV2 range and their theoretical uncertainties

doi:10.1051/epjconf/201713705016

	Improved estimates of the pion-photon transition form factor in the (1 <= Q(2) <= 5) GeV2 range and their theoretical uncertainties
	Mikhailov, S. V.1; Pimikov, A. V.1,2; Stefanis, N. G.3; Foka, Y ; Brambilla, N ; Kovalenko, V
	2017
卷号	137
DOI	10.1051/epjconf/201713705016
英文摘要	We consider the pion-photon transition form factor at low to intermediate spacelike momenta within the theoretical framework of light-cone sum rules. We derive predictions which take into account all currently known contributions stemming from QCD perturbation theory up to the next-to-next-to-leading order (NNLO) and by including all twist terms up to order six. In order to enable a more detailed comparison with forthcoming high-precision data, we also estimate the main systematic theoretical uncertainties, stemming from various sources, and discuss their influence on the calculations - in particular the dominant one related to the still uncalculated part of the NNLO contribution. The analysis addresses, in broad terms, also the role of the twist-two pion distribution amplitude derived with different approaches.
会议录	XIITH QUARK CONFINEMENT AND THE HADRON SPECTRUM
会议录出版者	E D P SCIENCES
会议录出版地	17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE
语种	英语
资助项目	NSFC[11650110431] ; NSFC[11575254]
WOS研究方向	Physics
WOS记录号	WOS:000404126100068
内容类型	会议论文
源URL	[http://119.78.100.186/handle/113462/57489]
专题	中国科学院近代物理研究所
通讯作者	Mikhailov, S. V.
作者单位	1.JINR, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 3.Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany
推荐引用方式 GB/T 7714	Mikhailov, S. V.,Pimikov, A. V.,Stefanis, N. G.,et al. Improved estimates of the pion-photon transition form factor in the (1 <= Q(2) <= 5) GeV2 range and their theoretical uncertainties[C]. 见:.