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Jan Kapitán for the STAR Collaboration



Full jet reconstruction in heavy-ion collisions is a promising tool for quantitative study of properties of the dense medium produced at RHIC. Measurements of d+Au collisions are important to disentangle initial state nuclear effects from medium-induced kT broadening and jet quenching. We report measurements of mid-rapidity (|η jet|<0.4|) di-jet correlations in d+Au using high-statistics run 8 RHIC data at √ sNN = 200 GeV. 1. Jet reconstruction Recently reported results on full jet reconstruction in heavy-ion collisions [1, 2] provide new insights into parton energy loss in hot QCD matter. Baseline measurements in smaller collision systems are needed to better interpret these results. In particular, measurement of the nuclear kT broadening [3], the transverse momentum of a jet pair, in d+Au collisions is important. The present analysis is based on √ sNN = 200 GeV d+Au run 8 data from the STAR experiment. The Beam Beam Counter detector in the Au nucleus fragmentation region is used to select the 20 % highest multiplicity events. In addition to the minimally biased trigger (MB) two high tower triggers (HT) were used, requiring one tower in the Barrel Electromagnetic Calorimete

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