The Scalar Photon Light-Cone Distribution Amplitude in the Instanton Vacuum Model of QCD

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2014,（4）
• 页码范围: 22-25
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/31/4/041102

摘要

Based on the principle of the Lorentz covariance,the transition matrix elements from an off-shell photon state to the vacuum are parameterized by the light-cone photon distribution amplitudes (DAs).Both the scalar off-shell photon light-cone DA and the corresponding coupling are calculated in the instanton vacuum model of quantum chromodynamics (QCD),and their explicit analytical expressions and the numerical results are given.The results for the other chiral-odd light-cone photon DAs and their couplings are presented as well.