Analysis of the virtual meson production in a (1+1)-dimensional scalar field model

Jul 21, 2022, 11:10 AM
Classroom 512 (APCTP)

Classroom 512


Asia Pacific Center for Theoretical Physics, Pohang, Gyeongbuk 37673, Korea


Yongwoo Choi (Korea University, Inha University)


We discuss the deeply virtual meson production in the (1+1)-dimensional scalar field model. To describe the scattering process, two approaches, the one-loop approximation and the leading twist of the scalar loop, are considered for the scalar meson production off the charged scalar target, e.g., $\gamma^{*} + {}^{4}{\rm He} \to f_{0}(980) + {}^{4}{\rm He}$. We particularly focus on the significance of the cat’s ears contribution and the discrepancy of the Compton form factors obtained from two approaches in JLab kinematic regions. It will provide a criterion for how much higher twist contributions are required for hard exclusive processes in specific kinematic regions.

Primary author

Yongwoo Choi (Korea University, Inha University)


Ho-Meoyng Choi (Kyungpook National University) Chueng-Ryong Ji (North Carolina State University) Yongseok Oh (Kyungpook National University)

Presentation materials