Extending the application of the light-cone sum rules method to low momenta using QCD renormalization-group summation: Theory and phenomenology

doi:10.1103/PhysRevD.103.096003

	Extending the application of the light-cone sum rules method to low momenta using QCD renormalization-group summation: Theory and phenomenology
	Mikhailov, S., V 2; Pimikov, A., V 1,2,4; Stefanis, N. G.3
刊名	PHYSICAL REVIEW D
	2021-05-07
卷号	103 期号:9 页码:14
ISSN号	2470-0010
DOI	10.1103/PhysRevD.103.096003
通讯作者	Mikhailov, S., V(mikhs@theor.jinr.ru) ; Pimikov, A., V(pimikov@mail.ru) ; Stefanis, N. G.(stefanis@tp2.ruhr-uni-bochum.de)
英文摘要	We show that using renormalization-group summation to generate the QCD radiative corrections to the pi - gamma. transition form factor, calculated with light-cone sum rules (LCSR), renders the strong coupling free of Landau singularities while preserving the QCD form-factor asymptotics. This enables a reliable applicability of the LCSR method to momenta well below 1 GeV2. This way, one can use the new preliminary BESIII data with unprecedented accuracy below 1.5 GeV2 to fine tune the prefactor of the twist-six contribution. Using a combined fit to all available data below 3.1 GeV2, we are able to determine all nonperturbative scale parameters and a few Gegenbauer coefficients entering the calculation of the form factor. Employing these ingredients, we determine a pion distribution amplitude with conformal coefficients (b(2), b(4)) that agree at the 1s level with the data for Q(2) <= 3.1 GeV2 and fulfill at the same time the lattice constraints on b(2) at (NLO)-L-3 together with the constraints from QCD sum rules with nonlocal condensates. The form-factor prediction calculated herewith reproduces the data below 1 GeV2 significantly better than analogous predictions based on a fixed-order power-series expansion in the strong coupling constant.
资助项目	Heisenberg-Landau Program 2020 ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB34000000] ; President's International Fellowship Initiative (PIFI)[2019PM0036] ; Ministry of Science and Higher Education of the Russian Federation[0852-2020-0032] ; Ministry of Science and Higher Education of the Russian Federation[BAZ0110/20-3-07IF]
WOS关键词	ANALYTIC PERTURBATION-THEORY ; DISTRIBUTION AMPLITUDES ; EVOLUTION KERNELS ; PION
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000649438300006
资助机构	Heisenberg-Landau Program 2020 ; Strategic Priority Research Program of the Chinese Academy of Sciences ; President's International Fellowship Initiative (PIFI) ; Ministry of Science and Higher Education of the Russian Federation
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137355]
专题	中国科学院近代物理研究所
通讯作者	Mikhailov, S., V; Pimikov, A., V; Stefanis, N. G.
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 2.JINR, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia 3.Ruhr Univ Bochum, Fak Phys & Astron, Inst Theoret Phys 2, D-44780 Bochum, Germany 4.Southern Fed Univ, Res Inst Phys, Rostov Na Donu 344090, Russia
推荐引用方式 GB/T 7714	Mikhailov, S., V,Pimikov, A., V,Stefanis, N. G.. Extending the application of the light-cone sum rules method to low momenta using QCD renormalization-group summation: Theory and phenomenology[J]. PHYSICAL REVIEW D,2021,103(9):14.
APA	Mikhailov, S., V,Pimikov, A., V,&Stefanis, N. G..(2021).Extending the application of the light-cone sum rules method to low momenta using QCD renormalization-group summation: Theory and phenomenology.PHYSICAL REVIEW D,103(9),14.
MLA	Mikhailov, S., V,et al."Extending the application of the light-cone sum rules method to low momenta using QCD renormalization-group summation: Theory and phenomenology".PHYSICAL REVIEW D 103.9(2021):14.