Transverse mass distributions in central heavy-ion collisions at high energies

  • The transverse mass spectra of protons, pions, kaons, Lambda and Antilambda produced in central nucleus-nucleus collisions at high energies are described by using one-temperature and two-temperature emission pictures. The calculated results are compared and found to be in good agreement with the experimental data of the E895, E866 and E917 Collaborations measured in central Au-Au collisions at the Alternating Gradient Synchrotron (AGS) energies and the NA49 Collaboration measured in central Pb-Pb collisions at the Super Proton Synchrotron (SPS) energies. It is demonstrated that the transverse mass distributions of protons, kaons, Lambda and Antilambda, except for Lambda hyperons produced in central Pb-Pb collisions at 158 A GeV, can be described by using the one-temperature emission picture, and for pions, we need to use the two-temperature emission picture.
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XIE Wen-Jie, YANG De, WANG Cui-Ping and WANG Zhi-Gang. Transverse mass distributions in central heavy-ion collisions at high energies[J]. Chinese Physics C, 2011, 35(4): 355-362. doi: 10.1088/1674-1137/35/4/007
XIE Wen-Jie, YANG De, WANG Cui-Ping and WANG Zhi-Gang. Transverse mass distributions in central heavy-ion collisions at high energies[J]. Chinese Physics C, 2011, 35(4): 355-362.  doi: 10.1088/1674-1137/35/4/007 shu
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Received: 2010-08-05
Revised: 2010-10-15
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Transverse mass distributions in central heavy-ion collisions at high energies

Abstract: The transverse mass spectra of protons, pions, kaons, Lambda and Antilambda produced in central nucleus-nucleus collisions at high energies are described by using one-temperature and two-temperature emission pictures. The calculated results are compared and found to be in good agreement with the experimental data of the E895, E866 and E917 Collaborations measured in central Au-Au collisions at the Alternating Gradient Synchrotron (AGS) energies and the NA49 Collaboration measured in central Pb-Pb collisions at the Super Proton Synchrotron (SPS) energies. It is demonstrated that the transverse mass distributions of protons, kaons, Lambda and Antilambda, except for Lambda hyperons produced in central Pb-Pb collisions at 158 A GeV, can be described by using the one-temperature emission picture, and for pions, we need to use the two-temperature emission picture.

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