Leading/nonleading charm production asymmetry in Σ^-p interactions

1999/04/01 by O. I. Piskounova, Olga Piskounova, Piskounova, Olga
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9904208

7 pages LaTeX with english text revised, 3 eps-figures, talk given at the Annual Session of Nucl.Phys.Department of RAN (Moscow, Russia, November 16-20,1998)

openalex publication_date 1999/04/01 · arxiv created 1999/04/08 · arxiv updated 2009/11/30 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28

Abstract

The asymmetries between the spectra of leading and nonleading charmed mesons measured in Σ^-A interactions at p_L= 340 GeV/c in the WA89 experiment are described in the framework of Quark-Gluon String Model. There are two versions of the model under consideration: one of them includes the sea charm quark-antiquark pairs and the other one does not. It's shown that the asymmetries between D^- and D⁺-meson spectra and between D_s^- and D⁺_s- meson spectra can be fitted by QGSM curves obtained with the same parameters as charm asymmetry in π^-A experiments described in previous studies. The QGSM results are compared with the calculations in the next-to-leading approximation of perturbative QCD approach carried out by the other authors.

Related

• Charmed sea contribution to the inclusive hadroproduction of the mesons with open charm in the Quark -- Gluon String Model
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• Measurement of production asymmetries
• Determination of light-flavor asymmetry in the Σ^± sea by the Drell-Yan process