en
Scientific article
Open access
English

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

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 739, p. 320-342
Collection
  • Open Access - SCOAP3
Publication date2014
Abstract

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>100 GeV . Commensurate minimum pT values are used for the other radii. 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.

Citation (ISO format)
ATLAS Collaboration. Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at √sNN=2.76 TeV with the ATLAS detector. In: Physics letters. B, 2014, vol. 739, p. 320–342. doi: 10.1016/j.physletb.2014.10.065
Main files (1)
Article (Published version)
Identifiers
ISSN of the journal0370-2693
442views
131downloads

Technical informations

Creation04/27/2015 10:30:58 AM
First validation04/27/2015 10:30:58 AM
Update time03/14/2023 11:13:15 PM
Status update03/14/2023 11:13:15 PM
Last indexation02/12/2024 11:20:47 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack