Direct rho(L) meson production in proton-proton and proton-antiproton collisions


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AYDIN C., UZUN O., Ahmadov A.

INTERNATIONAL JOURNAL OF MODERN PHYSICS A, vol.37, no.08, 2022 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 37 Issue: 08
  • Publication Date: 2022
  • Doi Number: 10.1142/s0217751x22500427
  • Journal Name: INTERNATIONAL JOURNAL OF MODERN PHYSICS A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Environment Index, INSPEC, zbMATH
  • Keywords: Higher twist, leading twist, rho meson distribution amplitudes, QCD SUM-RULES, PION FORM-FACTOR, DISTRIBUTION AMPLITUDES, ASYMPTOTIC-BEHAVIOR, EXCLUSIVE PROCESSES, DISTRIBUTIONS, PHOTONS
  • Karadeniz Technical University Affiliated: Yes

Abstract

We have investigated the contribution of the Higher Twist (HT) Feynman diagrams to the large-p(T) inclusive rho(L) meson production cross-section in proton-proton and proton-antiproton collisions and we discuss the phenomenological consequences of possible HT contributions to cross-sections. To extract HT subprocesses from Leading Twist (LT) background, we use various rho(L) meson distribution amplitudes (DAs). In the numerical calculations, the dependencies of the HT contribution on the transverse momentum and the rapidity are discussed with special emphasis on DAs. Analysis of our results shows that HT contributions decrease more rapidly than LT contributions with increasing p(T). The preceding results demonstrate that HT contributions must be considered especially in the region of low p(T) and the HT contribution to the cross-section depends on the choice of the meson DAs.