A combined model for pseudorapidity distributions in p-pcollisions at center-of-mass energies from 23.6 to 7000 GeV

  • In p-p collisions, the charged particles produced consist of two leading particles and those frozen out from the hot and dense matter created in the collisions. The two leading particles are in the projectile and target fragmentation regions, respectively, which, in this paper, are conventionally supposed to have Gaussian rapidity distributions. The hot and dense matter is assumed to expand according to unified hydrodynamics, a hydrodynamic model which unifies the features of the Landau and Hwa-Bjorken models, and freeze out into charged particles from a space-like hypersurface with a fixed proper time of τFO. The rapidity distribution of these charged particles can be derived analytically. The combined contribution from both leading particles and unified hydrodynamics is then compared against experimental data from a now available center-of-mass energy region from 23.6 to 7000 GeV. The model predictions are consistent with experimental measurements.
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Get Citation
Zhi-Jin Jiang, Yan Huang and Jie Wang. A combined model for pseudorapidity distributions in p-pcollisions at center-of-mass energies from 23.6 to 7000 GeV[J]. Chinese Physics C, 2016, 40(7): 074104. doi: 10.1088/1674-1137/40/7/074104
Zhi-Jin Jiang, Yan Huang and Jie Wang. A combined model for pseudorapidity distributions in p-pcollisions at center-of-mass energies from 23.6 to 7000 GeV[J]. Chinese Physics C, 2016, 40(7): 074104.  doi: 10.1088/1674-1137/40/7/074104 shu
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Received: 2015-10-26
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    Supported by Hujiang Foundation of China (B14004) and Shanghai Key Lab of Modern Optical System

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A combined model for pseudorapidity distributions in p-pcollisions at center-of-mass energies from 23.6 to 7000 GeV

    Corresponding author: Zhi-Jin Jiang,
  • 1. College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
Fund Project:  Supported by Hujiang Foundation of China (B14004) and Shanghai Key Lab of Modern Optical System

Abstract: In p-p collisions, the charged particles produced consist of two leading particles and those frozen out from the hot and dense matter created in the collisions. The two leading particles are in the projectile and target fragmentation regions, respectively, which, in this paper, are conventionally supposed to have Gaussian rapidity distributions. The hot and dense matter is assumed to expand according to unified hydrodynamics, a hydrodynamic model which unifies the features of the Landau and Hwa-Bjorken models, and freeze out into charged particles from a space-like hypersurface with a fixed proper time of τFO. The rapidity distribution of these charged particles can be derived analytically. The combined contribution from both leading particles and unified hydrodynamics is then compared against experimental data from a now available center-of-mass energy region from 23.6 to 7000 GeV. The model predictions are consistent with experimental measurements.

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