Study of the strong coupling constants αs(q2) of π- mesons and protons from p+p interactions at 205 GeV/c

Authors

  • Baatar Tseepeldorj Laboratory of Particle Physics, Department of High Energy Physics, Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia https://orcid.org/0009-0003-9397-7506
  • Batgerel Baatar Laboratory of Particle Physics, Department of High Energy Physics, Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia https://orcid.org/0009-0007-0760-1174
  • Alexander Malakhov Joint Institute for Nuclear Research, Dubna, Russia https://orcid.org/0000-0001-8569-8409
  • Khishigbuyan Narankhuu Laboratory of Particle Physics, Department of High Energy Physics, Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia https://orcid.org/0000-0001-8888-8515
  • Otgongerel Baatar Laboratory of Particle Physics, Department of High Energy Physics, Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia https://orcid.org/0000-0001-5907-3317
  • Sharkhuu Gombojav Laboratory of Particle Physics, Department of High Energy Physics, Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia https://orcid.org/0009-0009-3005-373X
  • Sovd Maamuu Laboratory of Particle Physics, Department of High Energy Physics, Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia https://orcid.org/0000-0002-1459-6955
  • Urangua Murdorj Laboratory of Particle Physics, Department of High Energy Physics, Institute of Physics and Technology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia https://orcid.org/0000-0003-1909-912X

Keywords:

high-energy physics, cut parameter, running coupling constant

Abstract

This paper presents an analysis of the strong coupling constant αs (q2) for π- mesons and protons produced in p+p interactions at 205 GeV/c. It is well known that the precise value of the cut parameter ΛQCD is instrumental in obtaining correct values of the strong coupling constant αs (q2). In this paper, we have attempted to determine the value of the cut parameter ΛQCD of αs (q2) . Our analysis showed that the square of the cut parameter Λ_QCD of the running coupling constant can be determined by the following formula, Λ2QCD=(cℏ)2  GeV2=0.0388 GeV2 or ΛQCD=√(0.0388 GeV2 )=0.197 GeV. The values of αs (q2) with this new cut parameter, as obtained in this paper, are compared with the corresponding LO QCD calculations and resultatively, a good agreement between the experimental results and theory was observed. Thus, the procedure used in this paper provides the possibility of obtaining the exact value of the cut parameter ΛQCD of the running coupling constant αs (q2).

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References

1. D. H. Perkins, Introduction to High Energy Physics, 4th ed., Cambridge University Press, Cambridge, UK, 2000.

2. D .I. Blokhintsev, "On the Fluctuations of Nuclear Matter," Sov. Phys. JETP 6 (1958) pp. 995–999.

3. A. M. Baldin, "Physics of Relativistic Nuclei," Particles and Nuclei 8 (1977) pp. 429–477.

4. W. Greiner and S. Schramm, Quantum Chromodynamics, Springer, Berlin, 2002. https://doi.org/10.1007/978-3-662-04707-1.

5. Ts. Baatar, B. Otgongerel, M. Sovd, G. Sharkhuu, A.I. Malakhov, and T. Tulgaa, "Cumulative proton production in π⁻+C interactions at 40 GeV/c and the uncertainty principle," JINR Preprint E1-2019-21, Dubna, 2019.

6. D. J. Gross and F. Wilczek, "Ultraviolet Behavior of Non-Abelian Gauge Theories," Phys. Rev. Lett. 30, pp. 1343–1346 (1973). https://doi.org/10.1103/PhysRevLett.30.1343

7. S. Bethke, "World Summary of α_s (2012)," arXiv:1210.0325, 2012; based on J. Beringer et al. (Particle Data Group), "Review of Particle Physics," Phys. Rev. D 86, 010001 (2012).

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Published

2026-06-19

How to Cite

Tseepeldorj, B., Baatar, B., Malakhov, A., Narankhuu, K., Baatar, O., Gombojav, S., Maamuu, S., & Murdorj, U. (2026). Study of the strong coupling constants αs(q2) of π- mesons and protons from p+p interactions at 205 GeV/c. Proceedings of the Mongolian Academy of Sciences, 66(02), 24-32. https://doi.org/10.5564/pmas.v66i02.5673

Issue

Vol. 66 No 02 (258) 2026

Section

Articles

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Copyright (c) 2026 Baatar Tseepeldorj, Batgerel Baatar, Alexander Malakhov, Khishigbuyan Narankhuu, Otgongerel Baatar, Sharkhuu Gombojav, Sovd Maamuu, Urangua Murdorj

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How to Cite

Tseepeldorj, B., Baatar, B., Malakhov, A., Narankhuu, K., Baatar, O., Gombojav, S., Maamuu, S., & Murdorj, U. (2026). Study of the strong coupling constants αs(q2) of π- mesons and protons from p+p interactions at 205 GeV/c. Proceedings of the Mongolian Academy of Sciences, 66(02), 24-32. https://doi.org/10.5564/pmas.v66i02.5673