26th International Symposium on Spin Physics (SPIN2025)

Polarized sold target for possible future AMBER program at CERN

Not scheduled

20m

Oral Polarized ion and lepton sources and targets Parallel

Speaker

Norihiro DOSHITA (Yamagata University)

Description

Recently COMPASS showed an interesting result on the d-quark Sivers TMD PDF via SIDIS process with muon beam and the polarized deuteron polarized target. It showed that the d-quark Sivers asymmetry had almost twice larger than u-quark at high-x region.

In order to understand the d-quark OAM contribution on the nucleon spin structure, further measurements via other processes like a Drell-Yan are required. The COMPASS collaboration measured the azimuthal asymmetries which relates to the Sivers TMD PDF via DY process with a negative pion beam and with a proton solid target in 2015 and 2018. We plan to use a positive pion beam and a polarized proton target to obtain a larger asymmetry on the Sivers TMD PDF.

Here I will discuss on the future possible polarized target for this program.