CFNS seminar

"Signature of gluon saturation: from STAR to EIC"

Presented by Dr. Xiaoxuan Chu, BNL

Thursday, October 15, 2020, 4:00 pm —

Abstract: The gluon parton distribution function (PDF) grows with lower and lower x very fast. As the total scattering cross section is bound by quantum mechanics, the raise of the gluon density has to be tamed. A definitive discovery of non-linear effects in QCD and as such the saturation regime would significantly improve our understanding of the proton structure and of nuclear interactions at high energy. Data recorded during the 2015 RHIC run with the STAR Forward Meson Spectrometer (FMS, 2.6 ≤ η ≤ 4.0), allow to measure the azimuthal correlation between two particles, which has been proposed to be one of the most direct and sensitive channels to access the underlying nonlinear gluon dynamics. In this talk, we will present new results for di-hadron correlations as a function of A and transverse momenta in p+p, p+Au and p+Al collisions at STAR. New opportunities for measurements with the STAR forward upgrade and future EIC to study non-linear effects in QCD will also be discussed.

Hosted by: Jinlong Zhang

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