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The feature study on the π and proton rapidity distributions at AGS, SPS and RHIC

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Abstract

The features of nuclear stopping power and multi-hadron production systematically are studied by making an analysis of rapidity distributions of pion and proton at AGS, SPS and RHIC in this work. It is found that nuclear stopping power increases linearly with project rapidity y p at AGS and SPS, but that is not liner at RHIC. It is argued that the average rapidity loss is saturated at central rapidity region at RHIC. For pion distribution, it is found that the phase space of pion distribution distributes uniformly in the longitudinal direction, and a linear relationship of 〈βγ〉L with log√s is given at AGS and SPS. Non-uniform flow model may explain the features of the distribution at AGS and SPS, but may not explain those of at RHIC.

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Authors and Affiliations

  1. College of Science, China Three Gorges University, Yichang, 443002, China

    ShengQin Feng & XianBao Yuan

  2. School of Physics and Technology, Wuhan University, Wuhan, 430072, China

    ShengQin Feng

  3. Institute of Particle Physics, Central China Normal University, Wuhan, 430070, China

    XianBao Yuan

Authors
  1. ShengQin Feng
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  2. XianBao Yuan
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Correspondence to ShengQin Feng.

Additional information

Supported by the Excellent Youth Foundation of Hubei Scientific Committee (Grant No. 2006ABB036), the Educational Commission of Hubei Province of China (Grant No. Z20081302), and the Natural Science Foundation of China Three Gorges University (Grant No. 2003C02)

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Feng, S., Yuan, X. The feature study on the π and proton rapidity distributions at AGS, SPS and RHIC. Sci. China Ser. G-Phys. Mech. Astron. 52, 198–206 (2009). https://doi.org/10.1007/s11433-009-0035-z

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  • DOI: https://doi.org/10.1007/s11433-009-0035-z

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