Heavy quarkonium photoproduction in ultrarelativistic heavy ion collisions

Yu Gong-Ming; Cai Yang-Bing; Li Yun-DeWang Jian-Song

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Heavy quarkonium photoproduction in ultrarelativistic heavy ion collisions

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Based on the factorization formalism of nonrelativistic quantum chromodynamics (NRQCD), we calculate the production cross section for the charmonium J/Psi,Psi(2S), chi(cJ), eta(c), and h(c) and the bottomonium gamma(nS), chi(bJ), eta(b), and h(b) produced by the hard photoproduction processes and fragmentation processes in relativistic heavy ion collisions. It is shown that the existing experimental data on heavy quarkonium production at the Large Hadron Collider (LHC) can be described in the framework of the NRQCD formalism, and the phenomenological values of matrix elements for color-singlet and color-octet components give the main contribution. The numerical results of photoproduction processes and fragmentation processes for the heavy quarkonium production become prominent in p-p collisions and Pb-Pb collisions at LHC energies.

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《Physical review, C》 |2017年第1期|共13页
作者
Yu Gong-Ming; Cai Yang-Bing; Li Yun-DeWang Jian-Song;
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作者单位

Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China;

Yunnan Univ, Dept Phys, Kunming 650091, Peoples R China;

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正文语种英语
中图分类原子核物理学、高能物理学;
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Heavy quarkonium photoproduction in ultrarelativistic heavy ion collisions

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