Systematic estimation of theoretical uncertainties in the calculation of the pion-photon transition form factor using light-cone sum rules

被引：34
作者：
Mikhailov, S. V. [1 ]
Pimikov, A. V. [1 ,2 ]
Stefanis, N. G. [3 ]
机构：
[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, Univ Str 150, D-44780 Bochum, Germany
来源：
PHYSICAL REVIEW D | 2016年 / 93卷 / 11期
基金：
中国国家自然科学基金; 俄罗斯基础研究基金会;
关键词：
EVOLUTION KERNELS; WAVE-FUNCTION; QCD;
D O I：
10.1103/PhysRevD.93.114018
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We consider the calculation of the pion-photon transition form factor F-gamma*(gamma pi 0)(Q(2)) within light-cone sum rules focusing attention to the low-mid region of momenta. The central aim is to estimate the theoretical uncertainties which originate from a wide variety of sources related to (i) the relevance of next-to-next-to-leading order radiative corrections (ii) the influence of the twist-four and the twist-six term (iii) the sensitivity of the results on auxiliary parameters, like the Borel scale M-2, (iv) the role of the phenomenological description of resonances, and (v) the significance of a small but finite virtuality of the quasireal photon. Predictions for F-gamma*(gamma pi 0)(Q(2)) are presented which include all these uncertainties and found to comply within the margin of experimental error with the existing data in the Q(2) range between 1 and 5 GeV2, thus justifying the reliability of the applied calculational scheme. This provides a solid basis for confronting theoretical predictions with forthcoming data bearing small statistical errors.
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页数：14
相关论文
共 54 条
[21]   2-LOOP CONTRIBUTION TO THE EVOLUTION OF THE PION WAVEFUNCTION [J].
DITTES, FM ;
RADYUSHKIN, AV .
PHYSICS LETTERS B, 1984, 134 (05) :359-362
[22]   Rare Decay pi(0) -> e(+) e(-) as a Test of Standard Model [J].
Dorokhov, A. E. .
PHYSICS OF PARTICLES AND NUCLEI LETTERS, 2010, 7 (04) :229-234
[23]  
EFREMOV AV, 1980, THEOR MATH PHYS+, V42, P97, DOI 10.1007/BF01032111
[24]   Decay constants of heavy-light vector mesons from QCD sum rules (vol 88, 014015, 2013) [J].
Gelhausen, P. ;
Khodjamirian, A. ;
Pivovarov, A. A. ;
Rosenthal, D. .
PHYSICAL REVIEW D, 2015, 91 (09)
[25]   Decay constants of heavy-light vector mesons from QCD sum rules (vol 88, 014015, 2013) [J].
Gelhausen, P. ;
Khodjamirian, A. ;
Pivovarov, A. A. ;
Rosenthal, D. .
PHYSICAL REVIEW D, 2014, 89 (09)
[26]   Decay constants of heavy-light vector mesons from QCD sum rules [J].
Gelhausen, P. ;
Khodjamirian, A. ;
Pivovarov, A. A. ;
Rosenthal, D. .
PHYSICAL REVIEW D, 2013, 88 (01)
[27]   Measurements of the meson-photon transition form factors of light pseudoscalar mesons at large momentum transfer [J].
Gronberg, J ;
Hill, TS ;
Kutschke, R ;
Lange, DJ ;
Menary, S ;
Morrison, RJ ;
Nelson, HN ;
Nelson, TK ;
Qiao, C ;
Richman, JD ;
Roberts, D ;
Ryd, A ;
Witherell, MS ;
Balest, R ;
Behrens, BH ;
Ford, WT ;
Park, H ;
Roy, J ;
Smith, JG ;
Alexander, JP ;
Bebek, C ;
Berger, BE ;
Berkelman, K ;
Bloom, K ;
Cassel, DG ;
Cho, HA ;
Coffman, DM ;
Crowcroft, DS ;
Dickson, M ;
Drell, PS ;
Ecklund, KM ;
Ehrlich, R ;
Elia, R ;
Foland, AD ;
Gaidarev, P ;
Galik, RS ;
Gittelman, B ;
Gray, SW ;
Hartill, DL ;
Heltsley, BK ;
Hopman, PI ;
Kandaswamy, J ;
Kim, PC ;
Kreinick, DL ;
Lee, T ;
Liu, Y ;
Ludwig, GS ;
Masui, J ;
Mevissen, J ;
Mistry, NB .
PHYSICAL REVIEW D, 1998, 57 (01) :33-54
[28]   Dispersive analysis of the pion transition form factor [J].
Hoferichter, M. ;
Kubis, B. ;
Leupold, S. ;
Niecknig, F. ;
Schneider, S. P. .
EUROPEAN PHYSICAL JOURNAL C, 2014, 74 (11)
[29]   Form factors of γ*ρ→π and γ*γ→π0 transitions and light-cone sum rules [J].
Khodjamirian, A .
EUROPEAN PHYSICAL JOURNAL C, 1999, 6 (03) :477-484
[30]   Transition form factors and mixing of pseudoscalar mesons from anomaly sum rule [J].
Klopot, Yaroslav ;
Oganesian, Armen ;
Teryaev, Oleg .
PHYSICAL REVIEW D, 2013, 87 (03)
123456