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Multiplicity dependence of charged particle,? meson, and multistrange particle productions in p + p collisions at s~(1/2) = 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  
【摘要】:We report the multiplicity dependence of charged particle production for the n~±, K~±, p, , and ? mesons at |y|1:0 in p + p collisions at s~(1/2) = 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 p_T with respect to the multiplicity. No obvious particle species dependence of the splitting is observed.The multiplicity dependence of the ratios Kˉ/πˉ, K~+/π~+,/πˉ, p/π~+, and K_s~0 at mid-rapidity in p+ p collisions is found to follow a tendency similar to that in Au t Au collisions at (s_(NN))~(1/2) = 200 GeV at the Relativistic Heavy Ion Collider, indicating similar underlying initial production mechanisms despite the differences in the initial colliding systems.

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