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J/ψ and γ Photoproduction at Relativistic Heavy-Ion Collider |
| LI Yun-de1;XU Xiao-mei2;LIU Lian-shou3 |
| 1Department of Physics, Yunnan University, Kunming 650091
2Department of Physics, Yunnan Normal University, Kunming 650092
3Institute of Particle Physics, Huazhong Normal University, Wuhan 430070
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| Cite this article: |
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LI Yun-de, XU Xiao-mei, LIU Lian-shou 1999 Chin. Phys. Lett. 16 798-799 |
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Abstract Hard photoproduction of J /ψ and γ at the Relativistic Heavy-Ion Collider Au-Au, I-I, Cu-Cu, Si-Si, and 0-0 collisions is discussed in the process A+A → A+ J/ψ ( γ ) + X . It shows that in the rang of transverse momentum Pt < 4GeV the hard photoproduction process can be used to test the gluon distribution in the nucleus. So the process also provides a new way of testing the EMC effects. The large Pt heavy quark Qc and gluon fragmantizing into J /ψ are also studied in the range of 4 < Pt < 10 GeV.
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| Keywords:
25.20.-x
25.20.Lj
25.75.-q
25.85.+p
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Published: 01 November 1999
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| PACS: |
25.20.-x
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(Photonuclear reactions)
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25.20.Lj
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(Photoproduction reactions)
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25.75.-q
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(Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))
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25.85.+p
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