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Title: Mach Cone Induced by {gamma}-Triggered Jets in High-Energy Heavy-Ion Collisions

Medium excitation by jet shower propagation inside a quark-gluon plasma is studied within a linear Boltzmann transport and a multiphase transport model. Contrary to the naive expectation, it is the deflection of both the jet shower and the Mach-cone-like excitation in an expanding medium that is found to give rise to a double-peak azimuthal particle distribution with respect to the initial jet direction. Such a deflection is the strongest for hadron-triggered jets which are often produced close to the surface of a dense medium due to trigger bias and travel against or tangential to the radial flow. Without such trigger bias, the effect of deflection on {gamma}-jet showers and their medium excitation is weaker. Comparative study of hadron and {gamma}-triggered particle correlations can therefore reveal the dynamics of jet-induced medium excitation in high-energy heavy-ion collisions.
Authors:
; ;  [1] ;  [2] ;  [1] ;  [3]
  1. Institute of Particle Physics, Hua-Zhong Normal University, Wuhan 430079 (China)
  2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, P.O. Box 800-204, Shanghai 201800 (China)
  3. (United States)
Publication Date:
OSTI Identifier:
21532224
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 106; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevLett.106.012301; (c) 2011 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BOLTZMANN EQUATION; CORRELATIONS; DISTRIBUTION; ELEMENTARY PARTICLES; EXCITATION; GLUONS; HADRONS; HEAVY ION REACTIONS; JETS; QUARK MATTER; SHOWERS BOSONS; DIFFERENTIAL EQUATIONS; ELEMENTARY PARTICLES; ENERGY-LEVEL TRANSITIONS; EQUATIONS; INTEGRO-DIFFERENTIAL EQUATIONS; KINETIC EQUATIONS; MATTER; NUCLEAR REACTIONS; PARTIAL DIFFERENTIAL EQUATIONS