Skip to Main content Skip to Navigation
Journal articles

Measurement of the centrality dependence of J/{\psi} yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC

G. Aad B. Aubert 1 M. Aurousseau 1 N. Berger 1 J. Colas 1 L. Di Ciaccio 1 M. El Kacimi 1 S. Elles 1 P. Ghez 1 M. Gouanère 1 C. Goy 1 T. Guillemin 1 L. Helary 1 T. Hryn'Ova 1 P. Iengo 1 G. Ionescu 1 A. Jérémie 1 S. Jézéquel 1 J. Labbe 1 R. Lafaye 1 N. Massol 1 P. Perrodo 1 H. Przysiezniak 1 G. Sauvage 1 T. Todorov 1 D. Tsionou 1 I. Wingerter-Seez 1 R. Zitoun 1 Y. Zolnierowski 1 C. Biscarat 2 E. Cogneras 2 G. Rahal 2 H. Bachacou 3 F. Bauer 3 N. Besson 3 M. Boonekamp 3 L. Chevalier 3 F. Chevallier 3 J. Ernwein 3 A.I. Etienvre 3 A. Formica 3 L. Gauthier 3 F. Giraud 3 C. Guyot 3 S. Hassani 3 W. Kozanecki 3 E. Lancon 3 J.F. Laporte 3 E. Le Menedeu 3 M. Legendre 3 B. Lenzi 3 B. Mansoulie 3 J.-P. Meyer 3 N. Morange 3 R. Nicolaidou 3 A. Ouraou 3 D.M. Pomarede 3 B. Resende 3 C.R. Royon 3 Ph. Schune 3 J. Schwindling 3 M. Virchaux 3 S. Albrand 4 M.L. Andrieux 4 B. Clement 4 J. Collot 4 S. Crépé-Renaudin 4 P. de Saintignon 4 P.A. Delsart 4 J. Donini 4 D. Dzahini 4 J.Y. Hostachy 4 E. Laisne 4 F. Ledroit-Guillon 4 A. Lleres 4 A. Lucotte 4 F. Malek 4 P. Martin 4 F. Polci 4 J. Stark 4 X. Sun 4 B. Trocmé 4 T. Beau 5 S. Bordoni 5 G. Calderini 5 A. Camard 5 P. Cavalleri 5 E. Chareyre 5 S. de Cecco 5 F. Derue 5 D. Imbault 5 M.W. Krasny 5 D. Lacour 5 B. Laforge 5 O. Le Dortz 5 J. Lellouch 5 G. Marchiori 5 I. Nikolic-Audit 5 J. Ocariz 5 M. Ridel 5 L. Roos 5 Ph. Schwemling 5 Timothée Theveneaux-Pelzer 5 S. Trincaz-Duvoid 5 T.N. Trinh 5 F. Vannucci 6 S. Aoun 7 C. Bee 7 C. Benchouk 7 K. Bernardet 7 N. Bousson 7 C. Cerna 7 J. C. Clémens 7 Y. Coadou 7 S. Correard 7 P. Delpierre 7 F. Djama 7 F. Etienne 7 L. Feligioni 7 F. Henry Couannier 7 D. Hoffmann 7 F. Hubaut 7 M. Kuna 7 E. Le Guierrec 7 Jérémy Lévêque 7 B. Li 7 E. Monnier 7 J. Odier 7 E. Petit P. Pralavorio 7 Z. Qian 7 A. Rozanov 7 M. Talby 7 N. Tannoury 7 S. Tisserant 7 J. Toth 7 F. Touchard 7 L. Vacavant 7 Emmanuel Busato 8 D. Calvet 8 R. Camacho 8 Diane Cinca 9 R. Febbraro 8 N. Ghodbane 8 C. Guicheney 8 D. Pallin 8 F. Podlyski 8 C. Santoni 8 L. P. Says 8 F. Vazeille 8 S. Viret 8 H. Abreu 10 N. Andari 10 C. Arnault 10 E. Augé 10 P. Barrillon 10 M. Benoit 10 S. Binet 10 J.-B. Blanchard 10 C. Bourdarios 10 D. Breton 10 C. Collard 11 C. de la Taille 10 J.B. de Vivie de Regie 10 S. Diglio 10 L. Duflot 10 M. Escalier 10 A.C. Falou 10 L. Fayard 10 D. Fournier 10 J.-F. Grivaz 10 M. Heller 10 S. Henrot-Versillé 10 J. Hrivnac 10 L. Iconomidou-Fayard 10 J. Idarraga 10 M. Kado 10 A. Lounis 10 N. Makovec 10 P. Matricon 10 F. Niedercorn 10 L. Poggioli 10 P. Puzo 10 A. Renaud 10 D. Rousseau 10 X. Ruan 10, 12 G. Rybkin 10 J.B. Sauvan 10 J. Schaarschmidt 10 A.C. Schaffer 10 L. Serin 10 S. Simion 10 R. Tanaka 10 J.J. Veillet 10 I. Vukotic 10 F. Wicek 10 D. Zerwas 10 Zhen Zhang 10
Abstract : Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/{\psi} mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy \surd sNN = 2.76 TeV, corresponding to an integrated luminosity of about 6.7 {\mu}b^{-1}, J/{\psi} mesons are reconstructed via their decays to {\mu}+{\mu}- pairs. The measured J/{\psi} yield, normalized to the number of binary nucleon-nucleon collisions, is found to significantly decrease from peripheral to central collisions. The centrality dependence is found to be qualitatively similar to the trends observed at previous, lower energy experiments. The same sample is used to reconstruct Z bosons in the {\mu}+{\mu}- final state, and a total of 38 candidates are selected in the mass window of 66 to 116 GeV. The relative Z yields as a function of centrality are also presented, although no conclusion can be inferred about their scaling with the number of binary collisions, because of limited statistics. This analysis provides the first results on J/{\psi} and Z production in lead-lead collisions at the LHC.
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00554929
Contributor : Claudine Bombar <>
Submitted on : Tuesday, January 11, 2011 - 5:12:31 PM
Last modification on : Saturday, September 19, 2020 - 4:54:40 AM

Links full text

Identifiers

Citation

G. Aad, B. Aubert, M. Aurousseau, N. Berger, J. Colas, et al.. Measurement of the centrality dependence of J/{\psi} yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC. Physics Letters B, Elsevier, 2011, 697, pp.294-312. ⟨10.1016/j.physletb.2011.02.006⟩. ⟨in2p3-00554929⟩

Share

Metrics

Record views

764