skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at √ sNN = 2.76 TeV with the ATLAS detector

Abstract

In this study, measurements of charged-particle fragmentation functions of jets produced in ultra-relativistic nuclear collisions can provide insight into the modification of parton showers in the hot, dense medium created in the collisions. ATLAS has measured jets in √s NN = 2.76 TeV Pb+Pb collisions at the LHC using a data set recorded in 2011 with an integrated luminosity of 0.14 nb –1. Jets were reconstructed using the anti-kt algorithm with distance parameter values R = 0.2, 0.3, and 0.4. Distributions of charged-particle transverse momentum and longitudinal momentum fraction are reported for seven bins in collision centrality for R=0.4 jets with p T jet. Commensurate minimum p T values are used for the other radii. The ratios of fragment distributions in each centrality bin to those measured in the most peripheral bin are presented. These ratios show a reduction of fragment yield in central collisions relative to peripheral collisions at intermediate z values, 0.04≲z≲0.2, and an enhancement in fragment yield for z≲0.04. A smaller, less significant enhancement is observed at large z and large p T in central collisions.

Authors:
 [1];  [2];  [3];  [4]
  1. Aix-Marseille Univ., and CNRS/IN2P3, Marseille (France)
  2. Univ. of Oklahoma, Norman, OK (United States)
  3. Academia Sinica, Taipei (Taiwan)
  4. Univ. Paris-Sud and CNRS/IN2P3, Orsay (France). et. al.
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
ATLAS Collaboration
OSTI Identifier:
1213870
Alternate Identifier(s):
OSTI ID: 1223124; OSTI ID: 1223266; OSTI ID: 1223267; OSTI ID: 1223343
Grant/Contract Number:  
AC02-06CH11357; AC02-05CH11231; SC00112704; AC03-76SF00515
Resource Type:
Journal Article: Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 739; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Aad, G., Abbott, B., Abdallah, J., and Khalek, S. Abdel. Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at √sNN = 2.76 TeV with the ATLAS detector. United States: N. p., 2014. Web. doi:10.1016/j.physletb.2014.10.065.
Aad, G., Abbott, B., Abdallah, J., & Khalek, S. Abdel. Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at √sNN = 2.76 TeV with the ATLAS detector. United States. doi:10.1016/j.physletb.2014.10.065.
Aad, G., Abbott, B., Abdallah, J., and Khalek, S. Abdel. Tue . "Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at √sNN = 2.76 TeV with the ATLAS detector". United States. doi:10.1016/j.physletb.2014.10.065.
@article{osti_1213870,
title = {Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at √sNN = 2.76 TeV with the ATLAS detector},
author = {Aad, G. and Abbott, B. and Abdallah, J. and Khalek, S. Abdel},
abstractNote = {In this study, measurements of charged-particle fragmentation functions of jets produced in ultra-relativistic nuclear collisions can provide insight into the modification of parton showers in the hot, dense medium created in the collisions. ATLAS has measured jets in √sNN = 2.76 TeV Pb+Pb collisions at the LHC using a data set recorded in 2011 with an integrated luminosity of 0.14 nb–1. Jets were reconstructed using the anti-kt algorithm with distance parameter values R = 0.2, 0.3, and 0.4. Distributions of charged-particle transverse momentum and longitudinal momentum fraction are reported for seven bins in collision centrality for R=0.4 jets with pTjet. Commensurate minimum pT values are used for the other radii. The ratios of fragment distributions in each centrality bin to those measured in the most peripheral bin are presented. These ratios show a reduction of fragment yield in central collisions relative to peripheral collisions at intermediate z values, 0.04≲z≲0.2, and an enhancement in fragment yield for z≲0.04. A smaller, less significant enhancement is observed at large z and large pT in central collisions.},
doi = {10.1016/j.physletb.2014.10.065},
journal = {Physics Letters. Section B},
issn = {0370-2693},
number = C,
volume = 739,
place = {United States},
year = {2014},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.physletb.2014.10.065

Citation Metrics:
Cited by: 65 works
Citation information provided by
Web of Science

Save / Share: