تقرير
Constraining kaon PDFs from Drell-Yan and $J/\psi$ production
| العنوان: | Constraining kaon PDFs from Drell-Yan and $J/\psi$ production |
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| المؤلفون: | Chang, Wen-Chen, Peng, Jen-Chieh, Platchkov, Stephane, Sawada, Takahiro |
| المصدر: | Phys. Lett. B 855, 138820 (2024) |
| سنة النشر: | 2024 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment, Nuclear Experiment, Nuclear Theory |
| الوصف: | The kaon parton distribution functions (PDFs) are poorly known due to paucity of kaon-induced Drell-Yan data. Nevertheless, these Drell-Yan data suggest a softer valence $u$ quark distribution of kaon than that of pion. We discuss the opportunity to constrain kaon PDFs utilizing existing kaon-induced $J/\psi$ production data. We compare the $K^- / \pi^-$ and $K^+ / \pi^+$ cross-section ratio data with calculations based on two global-fit parametrizations and two recent theoretical predictions for the kaon and pion PDFs, and test the results with two quarkonium production models. The $K^- / \pi^-$ cross-section ratio for $J/\psi$ production provides independent evidence of different valence quark distributions in pion and kaon. The $K^+ / \pi^+$ $J/\psi$ data are found to be sensitive to the gluon distribution in kaon. We show that these $J/\psi$ production data provide valuable constraints for evaluating the adequacy of currently available sets of kaon PDFs. Comment: 7 pages, 5 figures; published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.physletb.2024.138820 |
| URL الوصول: | http://arxiv.org/abs/2402.02860 |
| رقم الأكسشن: | edsarx.2402.02860 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.physletb.2024.138820 |
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