J/ψ pair production at the Tevatron with s^(1/2)=1.96TeV  

作　　者：乔从丰 孙立平 

机构地区：[1]College of Physical Sciences,University of Chinese Academy of Sciences [2]Theoretical Physics Center for Science Facilities (TPCSF),Chinese Academy of Sciences

出　　处：《Chinese Physics C》2013年第3期34-36,共3页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10935012, 10821063, 11175249)

摘　　要：We study the J/ψ pair production issue at the Fermilab Tevatron Run II with a center-of-mass energy of s^（1/2）=1.96TeV. Both the color-singlet and color-octet production mechanisms are considered. Our results show that the transverse momentum （pT） scaling behaviors of the double J/ψ differential cross-sections in the color-singlets and color-octets deviate distinctively from each other while pT is larger than 8GeV, and with a luminosity of 5fb^-1 , the J/ψ pair events from the color-singlet scheme are substantially measurable in the Tevatron experiments, even with a certain lower transverse momentum cut. Hence the Tevatron is still a possible platform to check the heavy quarkonium production mechanism.We study the J/ψ pair production issue at the Fermilab Tevatron Run II with a center-of-mass energy of s^（1/2）=1.96TeV. Both the color-singlet and color-octet production mechanisms are considered. Our results show that the transverse momentum （pT） scaling behaviors of the double J/ψ differential cross-sections in the color-singlets and color-octets deviate distinctively from each other while pT is larger than 8GeV, and with a luminosity of 5fb^-1 , the J/ψ pair events from the color-singlet scheme are substantially measurable in the Tevatron experiments, even with a certain lower transverse momentum cut. Hence the Tevatron is still a possible platform to check the heavy quarkonium production mechanism.

关 键 词：color-singlet scheme color-octet scheme POLARIZATION 

分 类 号：O572.211[理学—粒子物理与原子核物理]