Instanton-induced Semi-hard Parton Interactions and Phenomenology of High Energy Hadron Collisions

Abstract

We phenomenologically study whether partonic collisions responsible for the growth of hadron-hadron cross sections at high energy can be ascribed to instanton-induced processes. Although non-perturbative in nature, these interactions occur at the semi-hard scale $Q\sim 1-2$ GeV, and should therefore be described using information from deep inelastic leptonic scattering on the partonic constituents in nucleons, pions, and photons. After considering shadowing corrections in nucleon-nucleon scattering, we fix a free instanton tail suppression parameter and determine the effective quark-quark cross section. The resulting contributions to $NN$, $\pi N$, $\gamma N$, and $\gamma \gamma$ cross sections all $increase$ with energy differently, but in reasonable agreement with experimental data. We then proceed to an estimate of the number of such processes present in high energy Au-Au collisions at RHIC, finding that the amount of entropy produced by instanton/sphaleron events matches the observed amount.

7 pages RevTeX4, 1 .eps figure

References in corpus (5)

• Hadron production in nuclear collisions at RHIC and high density QCD
• Coherent gluon production in very high energy heavy ion collisions
• Instanton-induced Inelastic Collisions in QCD
• The Instanton/Sphaleron Mechanism of Prompt Gluon Production in High Energy Heavy Ion Collisions at RHIC
• Inelastic diffractive scattering in nonperturbative QCD

Cited by in corpus (6)

• Forced Tunneling and Turning State Explosion in Pure Yang-Mills Theory
• Jet Quenching in High Energy Heavy Ion Collisions by QCD Synchrotron-like Radiation
• Semiclassical Double-Pomeron Production of Glueballs and ${\eta }^{\prime }$
• Toward the Semiclassical Theory of the High Energy Heavy Ion Collisions
• Heisenberg's Universal (lns)**2 Increase of Total Cross Sections
• High energy QCD Lipatov's effective action in Euclidean space