Extracting Kinetic Freeze-Out Properties in High-Energy Collisions Using a Multisource Thermal Model

Fu-Hu Liu (State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China) ; Khusniddin K. Olimov (Laboratory of High Energy Physics, Physical-Technical Institute of Uzbekistan Academy of Sciences, Chingiz Aytmatov Str. 2b, Tashkent 100084, Uzbekistan; Department of Natural Sciences, National University of Science and Technology MISIS (NUST MISIS), Almalyk Branch, Almalyk 110105, Uzbekistan) ; Jia-Yu Chen (State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China) ; Mai-Ying Duan (State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China)

We study the transverse momentum (pT) spectra of neutral pions and identified charged hadrons produced in proton–proton (pp), deuteron–gold (d–Au), and gold–gold (Au–Au) collisions at the center of mass energy sNN=200 GeV. The study is made in the framework of a multisource thermal model used in the partonic level. It is assumed that the contribution to the pT-value of any hadron comes from two or three partons with an isotropic distribution of the azimuthal angle. The contribution of each parton to the pT-value of a given hadron is assumed to obey any one of the standard (Maxwell-Boltzmann, Fermi-Dirac, and Bose-Einstein) distributions with the kinetic freeze-out temperature and average transverse flow velocity. The pT spectra of the final-state hadrons can be fitted by the superposition of two or three components. The results obtained from our Monte Carlo method are used to fit the experimental results of the PHENIX and STAR Collaborations. The results of the present work serve as a suitable reference baseline for other experiments and simulation studies.

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  "abstracts": [
    {
      "source": "Hindawi", 
      "value": "We study the transverse momentum (<math id=\"M1\"><msub><mrow><mi>p</mi></mrow><mrow><mi>T</mi></mrow></msub></math>) spectra of neutral pions and identified charged hadrons produced in proton\u2013proton (pp), deuteron\u2013gold (d\u2013Au), and gold\u2013gold (Au\u2013Au) collisions at the center of mass energy <math id=\"M2\"><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mtext>NN</mtext></mrow></msub></mrow></msqrt><mo>=</mo><mn>200</mn></math> GeV. The study is made in the framework of a multisource thermal model used in the partonic level. It is assumed that the contribution to the <math id=\"M3\"><msub><mrow><mi>p</mi></mrow><mrow><mi>T</mi></mrow></msub></math>-value of any hadron comes from two or three partons with an isotropic distribution of the azimuthal angle. The contribution of each parton to the <math id=\"M4\"><msub><mrow><mi>p</mi></mrow><mrow><mi>T</mi></mrow></msub></math>-value of a given hadron is assumed to obey any one of the standard (Maxwell-Boltzmann, Fermi-Dirac, and Bose-Einstein) distributions with the kinetic freeze-out temperature and average transverse flow velocity. The <math id=\"M5\"><msub><mrow><mi>p</mi></mrow><mrow><mi>T</mi></mrow></msub></math> spectra of the final-state hadrons can be fitted by the superposition of two or three components. The results obtained from our Monte Carlo method are used to fit the experimental results of the PHENIX and STAR Collaborations. The results of the present work serve as a suitable reference baseline for other experiments and simulation studies."
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Published on:
25 March 2024
Publisher:
Hindawi
Published in:
Advances in High Energy Physics (2024)

DOI:
https://doi.org/10.1155/2024/9938669
arXiv:
2309.05923
Copyrights:
Copyright © 2024 Jia-Yu Chen et al.
Licence:
CC-BY-3.0

Fulltext files: