Nuclear Physics Seminar

"Probing the Low-x Structure of the Nucleus with the PHENIX Detector"

Presented by Mickey Chiu, Brookhaven National Laboratory

Tuesday, January 24, 2012, 11:00 am — Small Seminar Room, Bldg. 510

One of the fundamental goals of the PHENIX experiment is to understand the structure of cold nuclear matter, since this serves as the initial state for heavy-ion collisions. Knowing the initial state is vital for interpreting measurements of the sQGP from heavy-ion collisions. Moreover, the structure of the cold nucleus by itself is interesting since it is a test-bed for our understanding of QCD, and there is the possibility of studying novel QCD effects such as gluon saturation at low-x in the nucleus. At RHIC we can probe the structure of cold nuclear matter down to Bjorken x as low as ~10^{-3} in the Au nucleus
using d+Au collisions. We will present recent results from PHENIX of forward di-hadron correlations in d+Au collisions which show a large suppression of di-hadron pairs at forward rapidities [1], which might show that at RHIC energies one already reaches a region of interesting
effects at low-x in the nucleus. We will also briefly comment on other measurements by PHENIX, such as J/Psi production in d+Au and ultra-peripheral Au+Au collisions, which are excellent and complementary probes of cold nuclear matter at low-x.

Hosted by: Peter Steinberg

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