2023   01   en   p.03-13 M.R. Alizada, A.I. Ahmadov,
Thermal photons production in proton-proton collisions at high energies. Part I. Differential cross-sections of processes, calculated without and taking into account formfactor of mesons		  pdf 

ABSTRACT

Thermal photons produced in following processes: π+π - → γρ0, π±ρ0 → γπ±, ρ0 → γπ+π-, π+π- → γη, π ±η → γπ±, π+π- → γγ are considered Feynman diagrams of processes and matrix elements has been wrote. Differential cross-sections of processes has been calculated without and taking account formfactor of mesons. The dependencies of differential cross-sections of processes of production thermal photons on energy of colliding mesons (√s ), transverse momentum (pT) and on cosine of scattering angle of photons has been determined and has been comparised.

Keywords: proton-proton collision, mesons, thermal photons, Feynman diagram, differential cross-section.
PACS: 13.75. Lb; 13.30.Eg; 13.20.Cz; 13.25.Cq

DOI:-

Received: 14.12.2022

AUTHORS & AFFILIATIONS

Department of Theoretical Physics, Baku State University, 23, Z. Khalilov str., Baku, Az-1148, Azerbaijan
E-mail: mohsunalizade@gmail.com

Graphics and Images

              

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 REFERENCIES

[1]   P. Aurenche, R. Baier, M. Fontannaz. Phys.Rev. D 42, 1440 (1990). DOI:https://doi.org/10.1103.
[2]   T. Becher, C. Lorentzen, M.D. Schwartz. Phys. Rev. D 86, 054026 (2012). https://doi.org/10.1103/PhysRevD.86.054026, arXiv:1206.6115 [hep-ph].
[3]   https://doi.org/10.48550/arXiv.1206.6115.
[4]   J. Kapusta, P. Lichard, D. Seibert. High energy photons from quark-gluon plasma versus hot hadronic gas. Nuclear Physics A 544, 1992, 485.
[5]   J. Kapusta, P. Lichard, D. Seibert. High-energy photons from quark-gluon plasma versus hot hadronic gas. Phys.Rew. D 44, 2774 (1991).
[6]   P. Arnold, G.D. Moore, L.G. Yaffe. Photon emission from ultrarelativistic plasmas. JHEP 11, 2011, 057.
[7]   B. Krusche1. Photoproduction of mesons off nuclei Electromagnetic excitations of the neutron and meson-nucleus interactions. arXiv:1110.0192v1
[nucl-ex] 2 Oct (2011).
[8]   E. Byckling, K. Kajantie. John Wiley and Sons, London, New York, Sydney, Toronto, 1973.