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Search for decays of stopped, long-lived particles from 7 TeV pp collisions with the ATLAS detector

G. Aad S. Albrand 1 M.L. Andrieux 1 B. Clement 1 J. Collot 1 S. Crépé-Renaudin 1 P.A. Delsart 1 J. Donini 1 J.Y. Hostachy 1 E. Laisne 1 F. Ledroit-Guillon 1 A. Lleres 1 A. Lucotte 1 F. Malek 1 P. Martin 1 F. Polci 1 J. Stark 1 X. Sun 1 B. Trocmé 1 J. Wang 1 C. Weydert 1 C. Biscarat 2 E. Cogneras 2 G. Rahal 2 Emmanuel Busato 3 D. Calvet 3 S. Calvet 3 Reina Coromoto Camacho Toro 3 Diane Cinca 4 R. Febbraro 3 N. Ghodbane 3 C. Guicheney 3 H. Liao 3 D. Pallin 3 F. Podlyski 3 C. Santoni 3 L. P. Says 3 F. Vazeille 3 H. Abreu 5 N. Andari 5 C. Arnault 5 E. Augé 5 P. Barrillon 5 M. Benoit 5 S. Binet 5 J.-B. Blanchard 5 C. Bourdarios 5 D. Breton 5 C. Collard 5 C. de la Taille 5 J.B. de Vivie de Regie 5 S. Diglio 5 L. Duflot 5 M. Escalier 5 A.C. Falou 5 L. Fayard 5 D. Fournier 5 J.-F. Grivaz 5 M. Heller 5 S. Henrot-Versillé 5 J. Hrivnac 5 L. Iconomidou-Fayard 5 J. Idarraga 5 M. Kado 5 A. Lounis 5 N. Makovec 5 P. Matricon 5 F. Niedercorn 5 L. Poggioli 5 P. Puzo 5 A. Renaud 5 D. Rousseau 5 X. Ruan 5 G. Rybkin 5 J.B. Sauvan 5 J. Schaarschmidt 5 A.C. Schaffer 5 L. Serin 5 S. Simion 5 R. Tanaka 5 J.J. Veillet 5 I. Vukotic 5 F. Wicek 5 D. Zerwas 5 Z. Zhang 5 S. Aoun 6 C. P. Bee 6 C. Benchouk 6 C. Bertella 6 N. Bousson 6 J. C. Clémens 6 Y. Coadou 6 F. Djama 6 F. Etienne 6 L. Feligioni 6 F. Henry-Couannier 6 D. Hoffmann 6 F. Hubaut 6 E.B. F. G. Knoops 6 E. Le Guirriec 6 B. Li 6 J. Maurer 6 E. Monnier 6 J. Odier 6 P. Pralavorio 6 Z. Qian 6 A. Rozanov 6 M. Talby 6 N. Tannoury 6 S. Tisserant 6 J. Toth 6 F. Touchard 6 L. Vacavant 6 P. Delpierre 6 E. Petit 6 L. Aperio Bella 7 B. Aubert 7 N. Berger 7 J. Colas 7 L. Di Ciaccio 7 T.K.O. Doan 7 S. Elles 7 P. Ghez 7 C. Goy 7 L. Helary 7 T. Hryn'Ova 7 A. Jérémie 7 S. Jézéquel 7 M. Kataoka 7 J. Labbe 7 R. Lafaye 7 J. Leveque 7 V.P. Lombardo 7 N. Massol 7 P. Perrodo 7 H. Przysiezniak 7 E. Richter-Was 7 G. Sauvage 7 E. Sauvan 7 T. Todorov 7 D. Tsionou 7 I. Wingerter-Seez 7 R. Zitoun 7 Y. Zolnierowski 7
Abstract : New metastable massive particles with electric and colour charge are features of many theories beyond the Standard Model. A search is performed for long-lived gluino-based R-hadrons with the ATLAS detector at the LHC using a data sample corresponding to an integrated luminosity of 31 pb^-1. We search for evidence of particles that have come to rest in the ATLAS detector and decay at some later time during the periods in the LHC bunch structure without proton-proton collisions. No significant deviations from the expected backgrounds are observed, and a cross-section limit is set. It can be interpreted as excluding gluino-based R-hadrons with masses less than 341 GeV at the 95% C.L., for lifetimes from 10^-5 to 10^3 seconds and a neutralino mass of 100 GeV.
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Submitted on : Friday, January 27, 2012 - 9:24:57 AM
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G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, et al.. Search for decays of stopped, long-lived particles from 7 TeV pp collisions with the ATLAS detector. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2012, 72, pp.1965. ⟨10.1140/epjc/s10052-012-1965-6⟩. ⟨in2p3-00663421⟩

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