Valence Quark and Gluon Distributions of Kaon from J/Psi Production

Abstract

The only experimental information on the parton distribution of kaons was obtained from the scarce kaon-induced Drell-Yan cross section data. From these data, evidence for a valence $u$ quark distribution of kaon softer than that of pion was found. We study the feasibility to extract kaon's valence quark distribution via the existing kaon-induced J/psi production data. We compare the NA3 data on the K- / pi- and K+ / pi+ ratios for J/psi production on a platinum target with theoretical calculations based on the color-evaporation model. We show that the NA3 data on J/psi production provide an independent evidence for a valence $u$ quark distribution softer in kaon than in pion. The data also suggest different gluon distributions for kaon and pion.

arXiv comment5 pages, 4 figures

Cited by in corpus (5)

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• Pion and kaon valence-quark quasiparton distributions
• Statistical approach of pion parton distributions from Drell-Yan process
• A New Extraction of Pion Parton Distributions in the Statistical Model
• Kaon Structure in the confining Nambu-Jona-Lasino Model