# Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2018 Impact factor 0.961

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (9): 136

• NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH •

### Multiplicity dependence of charged particle, ? meson, and multi-strange particle productions in p+p collisions at √s= 200 GeV from PYTHIA simulation

Sheng-Hui Zhang, Long Zhou, Yi-Fei Zhang, Ming-Wei Zhang, Cheng Li, Ming Shao, Yong-Jie Sun, Ze-Bo Tang

1. University of Science and Technology of China, Hefei 230026, China
• Contact: Yi-Fei Zhang E-mail:ephy@ustc.edu.cn
• Supported by:

This work was supported by the Major State Basic Research Development Program in China (No. 2014CB845400), the National Natural Science Foundation of China (No. 11375184), the Youth Innovation Promotion Association Fund of CAS (No. CX2030040079), the Ministry of Science and Technology (MoST) of China (No. 2016YFE0104800), and the Science and Technological Fund of Anhui Province for Outstanding Youth (No. 1808085J02).

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Sheng-Hui Zhang, Long Zhou, Yi-Fei Zhang, Ming-Wei Zhang, Cheng Li, Ming Shao, Yong-Jie Sun, Ze-Bo Tang. Multiplicity dependence of charged particle, ? meson, and multi-strange particle productions in p+p collisions at √s= 200 GeV from PYTHIA simulation.Nuclear Science and Techniques, 2018, 29(9): 136

Abstract:

We report the multiplicity dependence of charged particle production for the π±, K±, p, \bar{p}, and / mesons at |y|<1.0 in p+ p collisions at \sqrt{s}=200 GeV from a PYTHIA simulation. The impact of multiple parton interactions and gluon contributions is studied and found to be a possible source of the splitting of the particle yields as a function of pT with respect to the multiplicity. No obvious particle species dependence of the splitting is observed. The multiplicity dependence of the ratios K, K++, \bar{p}/π,  p/π+, and K$_s^0$ at mid-rapidity in p+p collisions is found to follow a tendency similar to that in Au þ Au collisions at \sqrt{s_{NN}} = 200 GeV at the Relativistic Heavy Ion Collider, indicating similar underlying initial production mechanisms despite the differences in the initial colliding systems.