Double Diffractive Process Factorization from ηc and γ Associated Production at Tevatron and LHC
We present a study of associated ηc and γ double diffractive production in p-p collision based on Ingelman-Schlein model, and the framework of non-relativistic QCD factorization formalism for quarkonia production. The predic-tion of ηc and γ is more reliable than J/ψ production, because the associated ηc and γ production is a pure color-octetprocess, and the dominant contribution comes from color octet 1So(8) subprocess, which is related to the color octet matrixelement of 1So(8) of J/ψ by the heavy quark spin symmetry and the large PT J/ψ production data. We find that the ratioof diffractive to inclusive cross sections is independent of the values of color octet matrix elements, but is sensitive to thegluon factor of the Pomeron and renormalized Pomeron flux factors. So experimental measurement of this ratio can giveus more information of the nature of Pomeron and test the assumption of hard diffractive factorization in hadron-hadron collisions.
作 者： YAN Zhan-Yuan LI Zhi-wen DUAN Chun-Gui 作者单位： YAN Zhan-Yuan(Department of Applied Physics, North China Electric Power University, Baoding 071003, China)LI Zhi-wen(Chengde Teachers' College for Nationalities, Chengde 067000, China)
DUAN Chun-Gui(Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100039, China;Department of Physics, Hebei Teachers' University, Shijiazhuang 050016, China;CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China)
刊 名： 理论物理通讯(英文版) ISTIC SCI 英文刊名： COMMUNICATIONS IN THEORETICAL PHYSICS 年，卷(期)： 2004 42(9) 分类号： 关键词： diffractive Pomeron color-octet factorization