Skip to Main content Skip to Navigation
Journal articles

Measurement of charged jet suppression n Pb-Pb collisions at sqrt(sNN)=2.76TeV

B. Abelev Laurent Aphecetche 1 Y.W. Baek 2 V. Barret 2 N. Bastid 2 Guillaume Batigne 1 A.A.E. Bergognon 1 M. Bregant 1 C. Cheshkov 3 B. Cheynis 3 P. Crochet 2 H. Delagrange 1 L. Ducroux 3 P. Dupieux 2 B. Erazmus 1 Magali Estienne 1 Marie Germain 1 J.-Y. Grossiord 3 M. Guilbaud 3 B. Hippolyte 4 J.-C. Ianigro 3 C. Kuhn 4 A. Lardeux 1 S. Li 2 X. Lopez 2 A. Maire 4 F. Manso 2 M. Marchisone 2 Gines Martinez Garcia 1 J. Martin Blanco 1 A. Mas 1 L. Massacrier 1 L. Molnar 4 A. Morreale 1 Philippe Pillot 1 S. Porteboeuf-Houssais 2 L. Ronflette 1 P. Rosnet 2 C. Roy 1 X. Sanchez Castro 4 Y. Schutz 1 Alexandre Shabetai 1 Diego Stocco 1 R. Tieulent 3 A. Uras 3 L. Valencia Palomo 2 R. Vernet 5 B. Vulpescu 2 M. Wang 1 X. Zhang 2 Y. Zoccarato 3 N. Arbor 6 G. Conesa Balbastre 6 J. Faivre 6 C. Furget 6 R. Guernane 6 S. Kox 6 J.S. Real 6 C. Silvestre 6 Z. Conesa Del Valle 7 I. Das 7 B. Espagnon 7 C. Hadjidakis 7 I. Lakomov 7 C. Suire 7 J. D. Tapia Takaki 7 L. Valencia Palomo 7 Alberto Baldisseri 8 Herve Borel 8 Javier Castillo 9, 8 Jean-Luc Charvet 8 Hugo Pereira da Costa 8 A Rakotozafindrabe 9, 8
1 SUBATECH - Laboratoire SUBATECH Nantes
2 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
3 IPNL - Institut de Physique Nucléaire de Lyon
4 IPHC - Institut Pluridisciplinaire Hubert Curien
5 CC-IN2P3 - Centre de Calcul de l'IN2P3
6 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7 IPNO - Institut de Physique Nucléaire d'Orsay
8 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
9 DPHN - Département de Physique Nucléaire (ex SPhN)
Abstract : A measurement of the transverse momentum spectra of jets in Pb-Pb collisions at sqrt(sNN)=2.76TeV is reported. Jets are reconstructed from charged particles using the anti-k_T jet algorithm with jet resolution parameters R of 0.2 and 0.3 in pseudo-rapidity |eta|<0.5. The transverse momentum p_T of charged particles is measured down to 0.15 GeV/c which gives access to the low p_T fragments of the jet. Jets found in heavy-ion collisions are corrected event-by-event for average background density and on an inclusive basis (via unfolding) for residual background fluctuations and detector effects. A strong suppression of jet production in central events with respect to peripheral events is observed. The suppression is found to be similar to the suppression of charged hadrons, which suggests that substantial energy is radiated at angles larger than the jet resolution parameter R=0.3 considered in the analysis. The fragmentation bias introduced by selecting jets with a high p_T leading particle, which rejects jets with a soft fragmentation pattern, has a similar effect on the jet yield for central and peripheral events. The ratio of jet spectra with R=0.2 and R=0.3 is found to be similar in Pb-Pb and simulated PYTHIA pp events, indicating no strong broadening of the radial jet structure in the reconstructed jets with R<0.3.
Document type :
Journal articles
Complete list of metadatas
http://hal.in2p3.fr/in2p3-00879847
Contributor : Sylvie Flores <>
Submitted on : Tuesday, November 5, 2013 - 7:42:38 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:24 PM

Links full text

arxiv

Identifiers

Collections

IN2P3 | IPHC | DRS-IPHC | IPNL | LPC-CLERMONT | SUBATECH | UNIV-NANTES | LPSC | CNRS | UGA | PRES_CLERMONT | IPNO | CEA | DSM-IRFU | UNIV-LYON1 | CEA-DRF | SITE-ALSACE | IMT-ATLANTIQUE | SUBATECH-PLASMA | IP2I | UDL | GEPI

Citation

B. Abelev, Laurent Aphecetche, Y.W. Baek, V. Barret, N. Bastid, et al.. Measurement of charged jet suppression n Pb-Pb collisions at sqrt(sNN)=2.76TeV. Journal of High Energy Physics, Springer, 2014, 3, pp.013. ⟨10.1007/JHEP03(2014)013⟩. ⟨in2p3-00879847⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

713