Extraction of Kaon Partonic Distribution Functions from Drell-Yan and $J/\psi$ Production Data

Claude Bourrely; Franco Buccella; Wen-Chen Chang; Jen-Chieh Peng

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arXiv · 2305.18117

Extraction of Kaon Partonic Distribution Functions from Drell-Yan and $J/\psi$ Production Data

Claude Bourrely·Franco Buccella·Wen-Chen Chang·Jen-Chieh Peng

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Abstract

We present an analysis to extract kaon parton distribution functions (PDFs) for the first time using meson-induced Drell-Yan and quarkonium production data. Starting from the statistical model first developed for determining the partonic structure of spin-1/2 nucleon and later applied to the spin-0 pion, we have extended this approach to perform a global fit to existing kaon-induced Drell-Yan and $J/\psi$ production data. These data are well described by the statistical model, allowing a first extraction of the kaon PDFs. We find that both the Drell-Yan and the $J/\psi$ data favor a harder valence distribution for strange quark than for up quark in kaon. The kaon gluon distribution is further constrained by the $J/\psi$ production data. In particular, the momentum fraction carried by gluons is found to be similar for pion and kaon.

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Claude Bourrely, Franco Buccella, Wen-Chen Chang, Jen-Chieh Peng. 2023-05-29. Extraction of Kaon Partonic Distribution Functions from Drell-Yan and $J/\psi$ Production Data. https://arxiv.org/abs/2305.18117

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