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High Energy Physics - Phenomenology

arXiv:1503.05683 (hep-ph)
[Submitted on 19 Mar 2015 (v1), last revised 31 Aug 2015 (this version, v3)]

Title:Anomalous pion production induced by nontrivial topological structure of QCD vacuum

Authors:Nikolai Kochelev, Hee-Jung Lee, Baiyang Zhang, Pengming Zhang
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Abstract:A new mechanism for the pion production in the high energy reactions is suggested. It is related to the possibility for direct production of the pions induced by instantons, topologically nontrivial gluonic excitations of QCD vacuum. This mechanism does not require any fragmentation functions for production of pseudoscalar mesons in high energy reactions with hadrons. We calculate the contribution of a new mechanism to the inclusive $\pi^0$-meson production in high energy proton-proton collision. It is shown that it gives the dominated contribution to the inclusive cross-sections in the few GeV region for the transverse momentum of final pion. We discuss the possible application of a new mechanism to the phenomenon of the large spin effects observed in the numerous high energy reactions.
Comments: 5 pages, 4 figures, final version published in Phys.Rev.D92,034025 (2015)
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1503.05683 [hep-ph]
  (or arXiv:1503.05683v3 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1503.05683
Journal reference: Phys. Rev. D 92, 034025 (2015)
Related DOI: https://doi.org/10.1103/PhysRevD.92.034025

Submission history

From: Kochelev Nikolai Innokentevich [view email]
[v1] Thu, 19 Mar 2015 09:52:43 UTC (154 KB)
[v2] Fri, 20 Mar 2015 23:58:11 UTC (154 KB)
[v3] Mon, 31 Aug 2015 07:32:35 UTC (156 KB)
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