The ρ-meson time-like form factors in sub-leading pQCD

被引：11

作者：

de Melo, J. P. B. C. ^{[1
]}

Ji, Chueng-Ryong ^{[2
]}

Frederico, T. ^{[3
]}

机构：

[1] Univ Cruzeiro Sul, LFTC, BR-01506000 Sao Paulo, Brazil

[2] North Carolina State Univ, Dept Phys, Box 8202, Raleigh, NC 27695 USA

[3] DCTA, Inst Tecnol Aeronaut, BR-12228900 Sao Jose Dos Campos, Brazil

来源：

PHYSICS LETTERS B | 2016年 / 763卷

基金：

巴西圣保罗研究基金会;

关键词：

Perturbative QCD; rho-meson; Electromagnetic form factors; LIGHT-FRONT DYNAMICS; ELECTROMAGNETIC CURRENT; DEUTERON; COVARIANT; REGION; SCATTERING; HADRONS;

D O I：

10.1016/j.physletb.2016.10.018

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The annihilation/production process e(+) + e(-) -> rho(+) + rho(-) is studied with respect to the universal perturbative QCD (pQCD) predictions. Sub-leading contributions are considered together with the universal leading pQCD amplitudes such that the matrix elements of the rho-meson electromagnetic current satisfy the constraint from the light-front angular condition. The data from the BaBar collaboration for the time-like rho-meson form factors at root s = 10.58 GeV puts a stringent test to the onset of asymptotic pQCD behavior. The e(+) + e(-) -> rho(+) + rho(-) cross-section for s between 60 GeV2 and 160 GeV2 is predicted where the sub-leading contributions are still considerable. (C) 2016 The Author(s). Published by Elsevier B.V.

引用

页码：87 / 93

页数：7

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