Jet-like correlations with direct-photon and neutral-pion triggers at $\sqrt{s_{NN}}=200$ GeV
| Pub type: | Article |
| Citation: | Adamczyk2016PhysLettB689 |
| Status: | Published |
| Journal: | Physics Letters B |
| Volume: | 760 |
| Number: | "" |
| Year: | 2016 |
| Month: | July |
| Pages: | 689 - 696 |
| Note: | "" |
| ISSN: | 0370-2693 |
| URL: | http://www.sciencedirect.com/s... |
| DOI: | 10.1016/j.physletb.2016.07.046 |
| Abstract: | Abstract Azimuthal correlations of charged hadrons with direct-photon ( γ d i r ) and neutral-pion ( π 0 ) trigger particles are analyzed in central Au+Au and minimum-bias p + p collisions at s N N = 200 GeV in the \{STAR\} experiment. The charged-hadron per-trigger yields at mid-rapidity from central Au+Au collisions are compared with p + p collisions to quantify the suppression in Au+Au collisions. The suppression of the away-side associated-particle yields per γ d i r trigger is independent of the transverse momentum of the trigger particle ( p T trig ), whereas the suppression is smaller at low transverse momentum of the associated charged hadrons ( p T assoc ). Within uncertainty, similar levels of suppression are observed for γ d i r and π 0 triggers as a function of z T ( ≡ p T assoc / p T trig ). The results are compared with energy-loss-inspired theoretical model predictions. Our studies support previous conclusions that the lost energy reappears predominantly at low transverse momentum, regardless of the trigger energy. |
| Month_val: | 7 |
| Authors: | |
| Added by: | [DGM] |
| Total mark: | 0 |
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