DIS2023: XXX International Workshop on Deep-Inelastic Scattering and Related Subjects

Future Experiments of Coherent J/ψ Electro-production off 4He

29 Mar 2023, 09:20

20m

106 (MSU Kellogg center)

Parallel talk WG2: Small-x, Diffraction and Vector Mesons WG6

Speakers

Dr Chao Peng (Argonne National Laboratory) Chao Peng (Argonne National Laboratory) Chao Peng

Description

Coherent electro-production of $J/\psi$ on ${}^4$He offers a unique opportunity to explore the gluonic component of its matter distribution directly. The gluonic matter form factor of ${}^4$He can be experimentally accessed by performing a measurement of the reaction ${}^{4}He(e,e^{\prime 4}He)J/\psi$ where the $J/\psi$ is reconstructed via missing mass. Such measurement requires the coincidence detection of both scattered electrons and recoiling nuclei, and novel tagging detectors will be needed to reconstruct the recoiling ${}^4$He momentum starting at low kinetic energies. The measured differential cross sections over a wide range of $t$ will answer critical questions regarding the gluonic structure of ${}^4$He: Will gluonic matter clump identically and form a similar diffractive structure in the matter form factor? Will the gluonic matter have diffractive minima as it charge form factor at the same values of Q2, if any at all? In this talk, we will discuss the possible future experiments with a fixed target as well as similar studies at EIC.

Presentation materials

Jpsi_He4_DIS2023_Chao.pdf