Article ID Journal Published Year Pages File Type
1835825 Nuclear Physics A 2014 7 Pages PDF
Abstract

We present azimuthal angular correlations between charged hadrons and energy deposited in calorimeter towers in central d+Au and minimum bias p+p   collisions at sNN=200 GeV. The charged hadron is measured at mid-rapidities |η|<0.35|η|<0.35, and the energy is measured at two separate large rapidity (−3.7<η<−3.1−3.7<η<−3.1, Au-going direction and 3.1<η<3.93.1<η<3.9, d-going direction). An enhanced near-side angular correlation across |Δη|>|Δη|> 2.75 is observed in d  +Au collisions. Using the event-plane method applied to the Au-going energy distribution, we extract the anisotropy strength v2v2 for inclusive charged hadrons at mid-rapidity up to pT=4.5 GeV/cpT=4.5 GeV/c. We also present the measurement of v2v2 for identified π±π± and (anti)protons in central d+Au collisions, and observe a mass-ordering pattern similar to that seen in A+A heavy ion collisions. These results are compared with measurements from p  +Pb at sNN=5.02 TeV.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Nuclear and High Energy Physics
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