Probing Pion Valence Quark Distribution with Beam-charge Asymmetry of Pion-induced $J/\psi$ Production

Wen-Chen Chang, Marco Meyer-Conde, Jen-Chieh Peng +2

We consider the beam-charge asymmetry of the $J/\psi$ production cross sections in ${\pi }^{-}$- versus ${\pi }^{+}$-induced reactions on proton or nuclear targets. We show that the $J/\psi$ productio…