Space- and time-like kaon electromagnetic form factors in perturbative QCD  

作　　者：金丹 杨亚东 

机构地区：[1]Institute of Particle Physics, Huazhong Normal University [2]Key Laboratory of Quark & Lepton Physics, Ministry of Education

出　　处：《Chinese Physics C》2012年第10期941-946,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10735080, 11075059)

摘　　要：We present a phenomenological analysis of the space- and time-like charged kaon electromagnetic form factors in factorized perturbative QCD （pQCD） by employing an analytic model for αs （Q2 ） and an infrared （IR） finite gluon propagator. In the space-like region, due to the lack of available experimental data above Q2 ～ 0.2 GeV2 , we only give our results for intermediate energies and make no comparison. In the time-like region, our results agree reasonably well with the available experimental data at moderate energies, including the CLEO data and the J/ψ result.We present a phenomenological analysis of the space- and time-like charged kaon electromagnetic form factors in factorized perturbative QCD （pQCD） by employing an analytic model for αs （Q2 ） and an infrared （IR） finite gluon propagator. In the space-like region, due to the lack of available experimental data above Q2 ～ 0.2 GeV2 , we only give our results for intermediate energies and make no comparison. In the time-like region, our results agree reasonably well with the available experimental data at moderate energies, including the CLEO data and the J/ψ result.

关 键 词：electromagnetic form factor perturbative QCD analytical running coupling twist-3 corrections IR finite gluon propagator 

分 类 号：O572.243[理学—粒子物理与原子核物理]