Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (10): 100519-100519.doi: 10.11889/j.0253-3219.2014.hjs.37.100519


Full jet in a multi-phase transport model

NIE Maowu1,2 MA Guoliang1   

  1. 1(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China) 2(University of Chinese Academy of Sciences, Beijing 100049, China)
  • Received:2014-05-30 Revised:2014-09-22 Online:2014-10-10 Published:2014-10-16

Abstract: Background: Jet, produced by initial quantum chromodynamics QCD hard scatterings, is one of the important probes to study the properties of strongly-interacting matter because it interacts with the QCD medium and loses its energy when it passes through the QCD medium. Purpose: To understand the mechanism of jet quenching, a complementary study on fully reconstructed jet is essential. Methods: In this work, a multiphase transport model is utilized to study the dijet asymmetry, jet fragmentation function and jet shape. Results: The A Multi-Phase Transport model (AMPT) simulation results can basically describe the experimental data. Jet loses energy significantly for strong interactions between jets and partonic matter. Conclusion: Final dijet asymmetry is driven by both initial dijet asymmetry and partonic jet energy loss. Jet fragmentation function can be decomposed into fragmentation and coalescence parts. Compared with leading jet, the subleading jet shows a larger medium modification for its shapes, especially in central Pb+Pb collisions with a larger dijet asymmetry.

Key words: Heavy-ion collisions, A Multi-Phase Transport model (AMPT), Full jet, Fragmentation function, Jet shape