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Title: Solving the q ˆ puzzle with x and scale dependence

Abstract

Here we present here a possible resolution of the jet quenching parameter q ˆ puzzle by exploring the momentum fraction x and scale Q 2 dependence of q ˆ , in addition to temperature dependence. We explore the momentum broadening of the jet due to Glauber gluon exchange with the quark-gluon plasma (QGP). This has led us to define the momentum fraction x for the partons in the QGP. We also show here, for the first time, possible forms of the parton distribution function (PDF) of the QGP. The QGP-PDF as input in q ˆ has been used to fit the PHENIX and CMS data simultaneously. We observe that the scale evolution of the QGP-PDF and the energy of the jet are the missing ingredients responsible for the enhancement of q ˆ at the same temperature in RHIC collisions compared to LHC collisions.

Authors:
 [1];  [1];  [2];  [1];  [3];  [4]
  1. Wayne State Univ., Detroit, MI (United States)
  2. Arizona State Univ., Tempe, AZ (United States)
  3. China Normal Univ., Wuhan (China); Wayne State Univ., Detroit, MI (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Wayne State Univ., Detroit, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1502361
Grant/Contract Number:  
[SC0013460]
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Physics. A
Additional Journal Information:
[ Journal Volume: 967; Journal Issue: C]; Journal ID: ISSN 0375-9474
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Transverse momentum broadening; Scale evolution of ˆq; Quark-gluon plasma PDF; Factorization

Citation Formats

Kumar, Amit, Bianchi, Evan, Elledge, Jacob, Majumder, Abhijit, Qin, Guang -You, and Shen, Chun. Solving the qˆ puzzle with x and scale dependence. United States: N. p., 2017. Web. doi:10.1016/j.nuclphysa.2017.05.015.
Kumar, Amit, Bianchi, Evan, Elledge, Jacob, Majumder, Abhijit, Qin, Guang -You, & Shen, Chun. Solving the qˆ puzzle with x and scale dependence. United States. doi:10.1016/j.nuclphysa.2017.05.015.
Kumar, Amit, Bianchi, Evan, Elledge, Jacob, Majumder, Abhijit, Qin, Guang -You, and Shen, Chun. Mon . "Solving the qˆ puzzle with x and scale dependence". United States. doi:10.1016/j.nuclphysa.2017.05.015. https://www.osti.gov/servlets/purl/1502361.
@article{osti_1502361,
title = {Solving the qˆ puzzle with x and scale dependence},
author = {Kumar, Amit and Bianchi, Evan and Elledge, Jacob and Majumder, Abhijit and Qin, Guang -You and Shen, Chun},
abstractNote = {Here we present here a possible resolution of the jet quenching parameter qˆ puzzle by exploring the momentum fraction x and scale Q2 dependence of qˆ, in addition to temperature dependence. We explore the momentum broadening of the jet due to Glauber gluon exchange with the quark-gluon plasma (QGP). This has led us to define the momentum fraction x for the partons in the QGP. We also show here, for the first time, possible forms of the parton distribution function (PDF) of the QGP. The QGP-PDF as input in qˆ has been used to fit the PHENIX and CMS data simultaneously. We observe that the scale evolution of the QGP-PDF and the energy of the jet are the missing ingredients responsible for the enhancement of qˆ at the same temperature in RHIC collisions compared to LHC collisions.},
doi = {10.1016/j.nuclphysa.2017.05.015},
journal = {Nuclear Physics. A},
number = [C],
volume = [967],
place = {United States},
year = {2017},
month = {9}
}

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Figures / Tables:

Fig. 1 Fig. 1: Evaluating . (a) Jet propagating through a nucleus interact via exchange of Glauber gluon emitted from a parton inside nucleon B. (b) DGLAP evolution of PDF. (c) Scale evolution of in rest frame of nucleon B for the process shown in figure 1(a) and PDF (figure 1(b))more » as input.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.