Speaker
Dr
Guo-Liang Ma
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, P.O. Box 800-204, Shanghai 201800, China)
Description
Within the AMPT Monte Carlo model, fluctuations in the initial transverse parton density are shown to lead to harmonic flows. The net back-to-back dihadron azimuthal correlation after subtraction of contributions from harmonic flows still has a double peak that is independent of the initial geometric triangularity and unique to the jet-induced Mach cone and expanding hot spots distorted by radial flow. The longitudinal structure of hot spots also leads to a near-side ridge in dihadron correlation with a large rapidity gap. By successively randomizing the azimuthal angle of the transverse momenta and positions of initial partons, one can isolate the effects of jet-induced medium excitation and expanding hot spots on the dihadron azimuthal correlation. The double peaks in the net dihadron and $\gamma$-hadron correlation are quantitatively different since the later is caused only by jet-induced Mach cone.
Reference:
[1] Guo-Liang Ma and Xin-Nian Wang, arXiv:1011.5249
Primary authors
Dr
Guo-Liang Ma
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, P.O. Box 800-204, Shanghai 201800, China)
Dr
Xin-Nian Wang
(Nuclear Science Division MS 70R0319, Lawrence Berkeley National Laboratory, Berkeley, California 94720)
