Nuclear Physics Seminar
"New surprises from RHIC-Spin: forward neutron transverse single spin asymmetry from p+A collisions from PHENIX"
Presented by Alexander Bazilevsky, BNL
Tuesday, December 15, 2015, 11:00 am — Small Seminar Room, Bldg. 510
A surprisingly large transverse single spin asymmetry (A_N) in forward neutron production was discovered during the first polarized proton RHIC run in 2002. It was immediately utilized for monitoring proton beam polarization in experimental collision regions at RHIC. Later it was shown that one pion exchange model for forward neutron production was successful to describe both cross section and A_N. RHIC new data from polarized proton on nucleus collisions from RHIC 2015 run brought new surprise - a strong dependence of the asymmetry on nucleus size (or charge). Results also were found to strongly depend on particle production in other rapidity regions, indicating that there might be multiple neutron production mechanisms generating single spin asymmetry.
Hosted by: Oleg Eyser
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