Speaker
Description
In the high-energy polarized p+p collisions, transverse single-spin asymmetries TSSA of very forward particles produced at pseudorapidity larger than 6 allow us to study the spin-involved diffractive particle production mechanisms. In June 2017, the RHICf Collaboration installed an electromagnetic calorimeter in the zero-degree area of the STAR detector at the Relativistic Heavy Ion Collider, and measured TSSA of very forward particles. We, for the first time, have measured the TSSA of very forward neutral pion to study a possible diffractive contribution to the neutral pion TSSA. We have extended the previous measurements of neutron TSSA in the transverse momentum range of p_T < 0.4 GeV/c up to 1.0 GeV/c to study the kinematic dependence of the neutron TSSA in more detail. In this talk, we will introduce the RHICf experiment. Analysis results and future prospects will also be presented.
