期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
ηcandγAssociated Production in Hard DiffractiveπpCollision
摘要/Abstract
利用硬衍射产生过程的因子化方案与重夸克偶素的色八重态产生机制,计算了π介子与质子的衍射过程中ηc与γ协同产生的微分截面与总截面,在NRQCD理论框架下,ηc的产生是一个纯色八重态过程,在大pT区域,ηc+γ产生的贡献主要来自于|c(1S0(8))〉,而它的长程矩阵元的数值更为可靠,进而计算得到ηc的产生结果较为可靠.计算结果显示,微分截面dσ/d y随着y的增加而下降.用3套Pomeron中胶子的分布函数计算得到的总截面相差明显.
The differential cross section and total cross section of associatedηcandγproduction in harddiffractiveπpcollision are calculated based on ingelman-schlein model and heavy quarkonium color-octetproduction mechanism.In the framework of NRQCD factorization formalism,the productionofηcis a purecolor-octet process,the main contribution comes from|cc珋（1S （8）0）〉state,whose long distance matrix ele-ments are more reliable.The result shows a decline of dσ/dy with the increasein y.An remarkable differ-ence for total cross sectionσare obtainedby three sets of gluon distribution functions in Pomeron.Furthermeasurement of the process in experiments will test the assumption of hard diffractive factorization in had-ron-hadron collisions and gluon distribution function of Pomeron.