TY - JOUR
T1 - PHENIX study of the initial state with forward hadron measurements in 200 GeV p(d)+A and 3He+Au collisions
AU - Bryslawskyj, Jason
AU - Citron, Z.
AU - Dumancic, M.
AU - Fraenkel, Z.
AU - Kim, H. J.
AU - Makek, M.
AU - Milov, A.
AU - Ravinovich, I.
AU - Tarafdar, S.
AU - Tserruya, I.
N1 - Conference code: 27th
PY - 2019/2
Y1 - 2019/2
N2 - Forward hadron measurements in p(d)+A provide a signal to study nuclear shadowing, initial state energy loss and/or gluon saturation effects as a function of rapidity, centrality and energy. High p T identified π 0 measurements are an essential first step toward measuring prompt photon production. The π 0 measurements are enabled by the PHENIX MPC-EX detector, a Si-W preshower detector located in front of the Muon Piston Calorimeter (MPC), expanding the neutral pion reconstruction capabilities in the rapidity range 3.1 < η < 3.8 out to high energies, E < 80 GeV. Previous PHENIX measurements of punch-through charged hadrons in the muon arms in the rapidity range 1.4 < |η| < 2.2 were significantly improved through the capability of the forward silicon vertex detector (FVTX) to determine the transverse momentum and rapidity with high precision and reject background from secondary hadrons. PHENIX collected d+Au data with the MPC-EX in the 2016 run at s NN=200,62,39and19.6GeV; and p+p and p+Au(Al) data with the FVTX in 2015 at 200 GeV. In this talk, we will present first results for high p T π 0 production from the s NN=200GeV dataset, the status of the prompt photon measurement, as well as charged hadron nuclear modification factors in p+Au(Al) and 3He+Au.
AB - Forward hadron measurements in p(d)+A provide a signal to study nuclear shadowing, initial state energy loss and/or gluon saturation effects as a function of rapidity, centrality and energy. High p T identified π 0 measurements are an essential first step toward measuring prompt photon production. The π 0 measurements are enabled by the PHENIX MPC-EX detector, a Si-W preshower detector located in front of the Muon Piston Calorimeter (MPC), expanding the neutral pion reconstruction capabilities in the rapidity range 3.1 < η < 3.8 out to high energies, E < 80 GeV. Previous PHENIX measurements of punch-through charged hadrons in the muon arms in the rapidity range 1.4 < |η| < 2.2 were significantly improved through the capability of the forward silicon vertex detector (FVTX) to determine the transverse momentum and rapidity with high precision and reject background from secondary hadrons. PHENIX collected d+Au data with the MPC-EX in the 2016 run at s NN=200,62,39and19.6GeV; and p+p and p+Au(Al) data with the FVTX in 2015 at 200 GeV. In this talk, we will present first results for high p T π 0 production from the s NN=200GeV dataset, the status of the prompt photon measurement, as well as charged hadron nuclear modification factors in p+Au(Al) and 3He+Au.
UR - http://www.scopus.com/inward/record.url?scp=85060144176&partnerID=8YFLogxK
U2 - 10.1016/j.nuclphysa.2018.09.070
DO - 10.1016/j.nuclphysa.2018.09.070
M3 - مقالة
SN - 0375-9474
VL - 982
SP - 275
EP - 278
JO - Nuclear Physics A
JF - Nuclear Physics A
T2 - XXVIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions
Y2 - 13 May 2018 through 19 May 2018
ER -