Constraining kaon PDFs from Drell-Yan and $J/\psi$ production

Wen-Chen Chang, Jen-Chieh Peng, Stephane Platchkov +1

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…