Details

Autor(en) / Beteiligte

• Adare, A

Titel

Measurement of Long-Range Angular Correlation and Quadrupole Anisotropy of Pions and (Anti)Protons in Central d+Au Collisions at sNN=200 GeV

Ist Teil von

• Physical review letters, 2015-05, Vol.114 (19)

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2015

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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 midrapidity |[eta]|<0.35, and the energy is measured at large rapidity (-3.7<[eta]< -3.1, Au-going direction). An enhanced near-side angular correlation across | Delta [eta]|>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 v2 for inclusive charged hadrons at midrapidity up to pT=4.5 GeV/c. We also present the measurement of v2 for identified [pi]+ or - and (anti)protons in central d+Au collisions, and observe a mass-ordering pattern similar to that seen in heavy-ion collisions. These results are compared with viscous hydrodynamic calculations and measurements from p+Pb at sNN=5.02 TeV. The magnitude of the mass ordering in d+Au is found to be smaller than that in p+Pb collisions, which may indicate smaller radial flow in lower energy d+Au collisions.