Measurement of Inclusive Jet Charged-Particle Fragmentation Functions in pb + pb Collisions at √{S_{NN}} = 2.76 TeV with the ATLAS Detector

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Measurement of Inclusive Jet Charged-Particle Fragmentation Functions in pb + pb Collisions at √{S_{NN}} = 2.76 TeV with the ATLAS Detector

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Title: Measurement of Inclusive Jet Charged-Particle Fragmentation Functions in pb + pb Collisions at √{S_{NN}} = 2.76 TeV with the ATLAS Detector
Author(s):
Aad, G.;
Abbott, B.;
Abdallah, J.;
Abdel Khalek, S.;
Abdinov, O.;
Aben, R.;
Abi, B.;
Izen, Joseph M.;
Leyton, Michael;
Lou, Xinchou;
Namasivayam, Harisankar;
Reeves, Kendall;
ATLAS Collaboration
Date Created: 2014-11-04
Format: Text
Item Type: Article
Keywords: Show Keywords
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 √{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-k_t 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} > 100 GeV. Commensurate minimum p_T 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 less than or similar to 0.04. A smaller, less significant enhancement is observed at large z and large p_T in central collisions.
Publisher: Elsevier
ISSN: 0370-2693
Source: Physics Letters B
Link to Related Resource: http://dx.doi.org/10.1016/j.physletb.2014.10.065
Persistent Link: http://hdl.handle.net/10735.1/4306
Bibliographic Citation: Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, et al. 2014. "Measurement of inclusive jet charged-particle fragmentation functions in pb + pb collisions at √{S_{NN}} = 2.76 TeV with the ATLAS detector." Physics Letters B 739, doi:10.1016/j.physletb.2014.10.065
Terms of Use: CC BY 3.0 (Attribution)
© 2014 Elsevier B.V. or its licensors or contributors

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CC BY 3.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 3.0 (Attribution)