Two-particle Bose-Einstein correlations in $pp$ collisions at $\mathbf {\sqrt{s} =}$ 0.9 and 7 TeV measured with the ATLAS detector

G. Aad 1 S. Albrand 2 J. Brown 2 J. Collot 2 S. Crépé-Renaudin 2 B. Dechenaux 2 P.A. Delsart 2 C. Gabaldon 2 M.H. Genest 2 J.Y. Hostachy 2 F. Ledroit-Guillon 2 A. Lleres 2 A. Lucotte 2 F. Malek 2 C. Monini 2 J. Stark 2 B. Trocmé 2 M. Wu 2 G. Rahal 3 Z. Barnovska 4 N. Berger 4 M. Delmastro 4 L. Di Ciaccio 4 S. Elles 4 C. Goy 4 T. Hryn’ova 4 S. Jézéquel 4 I. Koletsou 4 R. Lafaye 4 J. Leveque 4 N. Massol 4 G. Sauvage 4 E. Sauvan 4 O. Simard 4 T. Todorov 4 I. Wingerter-Seez 4 S. Abdel Khalek 5 A. Bassalat 5 C. Becot 5 S. Binet 5 C. Bourdarios 5 D. Charfeddine 5 J.B. de Vivie De Regie 5 L. Duflot 5 M. Escalier 5 L. Fayard 5 D. Fournier 5 E.L. Gkougkousis 5 J.-F. Grivaz 5 T. Guillemin 5 F. Hariri 5 S. Henrot-Versillé 5 J. Hrivnac 5 L. Iconomidou-Fayard 5 M. Kado 5 A. Lounis 5 N. Makovec 5 C. Nellist 5 L. Poggioli 5 P. Puzo 5 A. Renaud 5 D. Rousseau 5 G. Rybkin 5 A.C. Schaffer 5 E. Scifo 5 L. Serin 5 S. Simion 5 R. Tanaka 5 H.L. Tran 5 D. Zerwas 5 Zhen Zhang 5 D. Boumediene 6 Emmanuel Busato 6 D. Calvet 6 S. Calvet 6 J. Donini 6 E. Dubreuil 6 N. Ghodbane 6 G. Gilles 6 Ph. Gris 6 C. Guicheney 6 H. Liao 6 D. Pallin 6 Daniela Paredes Hernández 6 F. Podlyski 6 C. Santoni 6 Timothée Theveneaux-Pelzer 6 Loïc Valery 6 F. Vazeille 6 L. Alio 1 M. Barbero 1 C. Bertella 1 Y. Coadou 1 S. Diglio 1 F. Djama 1 L. Feligioni 1 J. Gao 1 D. Hoffmann 1 F. Hubaut 1 E. B. F. G. Knoops 1 E. Le Guirriec 1 B. Li D. Madaffari 1 K. Mochizuki 1 E. Monnier 1 S. Muanza 1 Y. Nagai 1 E. Tiouchichine 1 S. Tisserant 1 J. Toth 1 Touchard F. 1 M. Ughetto 1 L. Vacavant 1
Abstract : The paper presents studies of Bose-Einstein Correlations (BEC) for pairs of like-sign charged particles measured in the kinematic range $p_{\rm T}>$ 100 MeV and $|\eta|<$ 2.5 in proton--proton collisions at centre-of-mass energies of 0.9 and 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. The integrated luminosities are approximately 7 $\mu$b$^{-1}$, 190 $\mu$b$^{-1}$ and 12.4 nb$^{-1}$ for 0.9 TeV, 7 TeV minimum-bias and 7 TeV high-multiplicity data samples, respectively. The multiplicity dependence of the BEC parameters characterizing the correlation strength and the correlation source size are investigated for charged-particle multiplicities of up to 240. A saturation effect in the multiplicity dependence of the correlation source size is observed using the high-multiplicity 7 TeV data sample. The dependence of the BEC parameters on the average transverse momentum of the particle pair is also investigated.
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European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2015, 75, pp.466. 〈10.1140/epjc/s10052-015-3644-x〉
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Soumis le : lundi 2 mars 2015 - 08:45:29
Dernière modification le : mardi 22 mai 2018 - 21:48:09

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G. Aad, S. Albrand, J. Brown, J. Collot, S. Crépé-Renaudin, et al.. Two-particle Bose-Einstein correlations in $pp$ collisions at $\mathbf {\sqrt{s} =}$ 0.9 and 7 TeV measured with the ATLAS detector. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2015, 75, pp.466. 〈10.1140/epjc/s10052-015-3644-x〉. 〈in2p3-01121521〉

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