TY  - JOUR
AU  - Hidalgo-Duque, C.
AU  - Llanes-Estrada, F. J.
PY  - 2015
DA  - 2015//
TI  - Soft interactions in jet quenching
T2  - Int. J. Mod. Phys. A
JO  - International Journal of Modern Physics A
SP  - 1550067
EP  - 25pp
VL  - 30
IS  - 13
PB  - World Scientific Publ Co Pte Ltd
KW  - Jet quenching parameter
KW  - Regge phenomenology
KW  - particle correlations and fluctuations
KW  - hard and soft scattering
KW  - relativistic heavy ion collisions
AB  - We study the collisional aspects of jet quenching in a high-energy nuclear collision, especially in the final state pion gas. The jet has a large energy, and acquires momentum transverse to its axis more effectively by multiple soft collisions than by few hard scatterings (as known from analogous systems such as J/psi production at Hera). Such regime of large E and small momentum transfer corresponds to Regge kinematics and is characteristically dominated by the pomeron. From this insight we estimate the jet quenching parameter in the hadron medium (largely a pion gas) at the end of the collision, which is naturally small and increases with temperature in line with the gas density and compare it to the jet quenching parameter obtained within the quark-gluon plasma (QGP) phase in widely known perturbative approximations. The physics in the quark-gluon plasma/liquid phase is less obvious, and here we revisit a couple of simple estimates that suggest indeed that the pomeron-mediated interactions are very relevant and should be included in analysis of the jet quenching parameter. Finally, since the occasional hard collisions produce features characteristic of a Levy flight in the q(perpendicular to)(2) plane perpendicular to the jet axis, we suggest one- and two-particle q perpendicular to correlations as interesting experimental probes sensitive to the nature (softness versus hardness) of the interactions of a jet inside the QGP.
SN  - 0217-751x
UR  - http://arxiv.org/abs/1309.7211
UR  - https://doi.org/10.1142/S0217751X15500670
DO  - 10.1142/S0217751X15500670
LA  - English
N1  - WOS:000353955400007
ID  - Hidalgo-Duque+Llanes-Estrada2015
ER  -