Title：Measurement of nucleon GPDs with pion beams at J-PARC
Time：2023/11/06 (Mon.) 12:30
Place：R517, New Physics Building, NTU

Abstract：
We propose to measure the pion-induced exclusive Drell-Yan process $\pi^- p \to \gamma^* n \to \mu^+\mu^- n$ using the E50 high-resolution spectrometer in the high-momentum beamline of Hadron Hall at J-PARC. The cross sections of this novel reaction will provide interesting information about the proton generalized parton distributions (GPDs) and the pion distribution amplitudes (DAs) through a timelike approach. The strategies and road maps for carrying out this measurement will be sketched.