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Here, this technical note provides supplemental material for the archival publication of the measure- ments of polarization transfer observables in elastic e → p → e→p scattering from the GEp-III and GEp-2γ experiments in Jefferson Lab's Hall C.
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Measurements and calculations of the air activation at a high-energy proton accelerator are described. The quantity of radionuclides released outdoors depends on operation scenarios including details of the air exchange inside the facility. To improve the prediction of the air activation levels, the MARS15 Monte Carlo code radionuclide production model was modified to be used for these studies. Measurements were done to benchmark the new model and verify its use in optimization studies for the new DUNE experiment at the Long Baseline Neutrino Facility (LBNF) at Fermilab. The measured production rates for the most important radionuclides – 11 C, 13 N, 15 O and 41 Ar – are in a good agreement with those calculated with the improved MARS15 code.
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In these proceedings, we present the latest Υ measurements with the STAR experiment. The production cross-section in p+p and the nuclear modification factor R p A in p+Au collisions at $\sqrt{s}$$_ {NN}$ = 200GeV are obtained via the dielectron channel. These measurements provide a p+p reference with significantly improved precision and quantification of the cold nuclear matter effects for Υ measurements in heavy-ion collisions at RHIC. The nuclear modification factor R AA in Au+Au collisions at $\sqrt{s}$$_ {NN}$ = 200GeV is obtained via both the dimuon and dielectron channels. The centrality and transverse momentum dependences of Υ(1S) and Υ(2S+3S) R AA are reported and compared to those at the LHC and theoretical calculations.
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The STAR Collaboration reports measurements of differential jet shapes and semi-inclusive jet fragmentation functions in Au+Au collisions at with the STAR detector at RHIC. Additionally, jet shapes, which represent the radial distribution of momentum carried by constituents, are measured differentially for (1) the charged particles transverse momentum and (2) the jet azimuthal angle relative to the second-order event plane. Based on the semi-inclusive population of jets recoiling from a high transverse momentum trigger hadron, jet fragmentation functions in 40-60% central heavy-ion collisions are measured, and compared to those in PYTHIA simulations for pp collisions.
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