5–10 Sept 2021
Online
Europe/Lisbon timezone

Back-to-back di-π0 correlations at STAR

5 Sept 2021, 16:23
15m
Online

Online

Talk QCD, spin physics and chiral dynamics QCD, spin physics and chiral dynamics

Speaker

Xiaoxuan Chu (BNL)

Description

Two-particle azimuthal correlation has been proposed to be one of the most direct and sensitive channels to access the nonlinear gluon dynamics in nuclei. Color Glass Condensate (CGC) predicts a suppression of back-to-back correlation in p(d)+A collisions compared to p+p collisions. In d+A collisions, the double-parton scattering (DPS) can be an alternative explanation of the suppression \cite{Strikman:2010bg}. A comparison of suppression in d+A and p+A with the same kinematics provides an opportunity to study the impact of DPS. During the 2015 and 2016 RHIC runs, STAR collected data with the Forward Meson Spectrometer (FMS, 2.6 η 4.0) in p+p, p+Al, p+Au and d+Au collisions at sNN=200 GeV, which enables the measurements of azimuthal correlations of neutral pions in the forward region. In this talk, we will present the preliminary results on forward di-π0 correlations as a function of event activity and π0's transverse momenta in p+p, p+Al and p+Au collisions, together with an analysis update of the same measurements in d+Au collisions.

\bibitem{Strikman:2010bg}
M. Strikman and W. Vogelsang, Phys. Rev. D \textbf{83}, 034029 (2011), 1009.6123.

Primary author

Presentation materials