| Autor: |
Cao, Zehua, Ruan, Lijuan, Tang, Zebo, Xu, Zhangbu, Yang, Chi, Yang, Shuai, Zha, Wangmei |
| Rok vydání: |
2018 |
| Předmět: |
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| DOI: |
10.48550/arxiv.1810.10685 |
| Popis: |
Recently, significant enhancements of J/$��$ production at very low transverse momenta were observed by the ALICE and STAR collaboration in peripheral hadronic A+A collisions. The anomaly excesses point to evidence of coherent photon-nucleus interactions in violent hadronic heavy-ion collisions, which were conventionally studied only in ultra-peripheral collisions. Assuming that the coherent photoproduction is the underlying mechanism which is responsible for the excess observed in peripheral A+A collisions, its contribution in p+p collisions with nuclear overlap, i.e. non-single-diffractive collisions, is of particular interest. In this paper, we perform a calculation of exclusive J/$��$ photoproduction in non-single-diffractive p+p collisions at RHIC and LHC energies base on the pQCD motivated parametrization from world-wide experimental data, which could be further employed to improve the precision of phenomenal calculations for photoproduction in A+A collisions. The differential rapidity and transverse momentum distributions of J/$��$ from photoproduction are presented. In comparison with the J/$��$ production from hadronic interactions, we find that the contribution of photoproduction is negligible. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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