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Article Dans Une Revue Physical Review D Année : 2013

Search for long-lived stopped R-hadrons decaying out-of-time with pp collisions using the ATLAS detector

G. Aad , S. Albrand (1) , J. Brown (1) , Q. Buat (1) , B. Clement (1) , J. Collot (1) , S. Crépé-Renaudin (1) , B. Dechenaux (1) , T. Delemontex (1) , P.A. Delsart (1) , C. Gabaldon (1) , M.H. Genest (1) , J.Y. Hostachy (1) , E. Laisne (1) , B.T. Le (1) , F. Ledroit-Guillon (1) , A. Lleres (1) , A. Lucotte (1) , F. Malek (1) , C. Monini (1) , J. Stark (1) , X. Sun (1) , B. Trocmé (1) , G. Rahal (2) , D. Boumediene (3) , Emmanuel Busato (3) , D. Calvet (3) , S. Calvet (3) , J. Donini (3) , E. Dubreuil (3) , N. Ghodbane (3) , Ph. Gris (3) , C. Guicheney (3) , H. Liao (3) , D. Pallin (3) , Daniela Paredes Hernández (3) , F. Podlyski (3) , C. Santoni (3) , Timothée Theveneaux-Pelzer (3) , Loïc Valery (3) , F. Vazeille (3) , S. Abdel Khalek (4) , E. Augé (4) , A. Bassalat (4) , S. Binet (4) , C. Bourdarios (4) , C. de La Taille (4) , J.B. de Vivie de Regie (4) , L. Duflot (4) , M. Escalier (4) , L. Fayard (4) , D. Fournier (4) , J.-F. Grivaz (4) , T. Guillemin (4) , S. Henrot-Versillé (4) , J. Hrivnac (4) , L. Iconomidou-Fayard (4) , J. Idarraga (4) , M. Kado (4) , N. Lorenzo Martinez (4) , A. Lounis (4) , N. Makovec (4) , L. Poggioli (4) , P. Puzo (4) , A. Renaud (4) , D. Rousseau (4) , G. Rybkin (4) , J.B. Sauvan (4) , J. Schaarschmidt (4) , A.C. Schaffer (4) , E. Scifo (4) , L. Serin (4) , S. Simion (4) , R. Tanaka (4) , H.L. Tran (4) , D. Zerwas (4) , Zhiqing Zhang (4) , N. Berger (5) , J. Colas (5) , M. Delmastro (5) , L. Di Ciaccio (5) , T.K.O. Doan (5) , S. Elles (5) , C. Goy (5) , T. Hryn'Ova (5) , S. Jézéquel (5) , H. Keoshkerian (5) , R. Lafaye (5) , J. Leveque (5) , V.P. Lombardo (5) , M. Maeno (5) , N. Massol (5) , P. Perrodo (5) , E. Petit (5) , H. Przysiezniak (5) , G. Sauvage (5) , E. Sauvan (5) , M. Schwoerer (5) , T. Todorov (5) , I. Wingerter-Seez (5) , R. Zitoun (5) , L. Alio (6) , M. Barbero (6) , C.P. Bee (6) , C. Bertella (6) , N. Bousson (6) , J.C. Clémens (6) , Y. Coadou (6) , F. Djama (6) , F. Etienne (6) , L. Feligioni (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) , Y. Nagai (6) , J. Odier (6) , P. Pralavorio (6) , A. Rozanov (6) , T. Serre (6) , M. Talby (6) , N. Tannoury (6) , E. Tiouchichine (6) , S. Tisserant (6) , J. Toth (6) , F. Touchard (6) , M. Ughetto (6) , L. Vacavant (6)
G. Aad
S. Calvet
E. Augé
D. Rousseau
Zhiqing Zhang
  • Fonction : Auteur
  • PersonId : 829631
N. Berger
C. Goy
T. Hryn'Ova
Y. Coadou

Résumé

An updated search is performed for gluino, top squark, or bottom squark R-hadrons that have come to rest within the ATLAS calorimeter, and decay at some later time to hadronic jets and a neutralino, using 5.0 and 22.9 fb-1 of pp collisions at 7 and 8 TeV, respectively. Candidate decay events are triggered in selected empty bunch crossings of the LHC in order to remove pp collision backgrounds. Selections based on jet shape and muon-system activity are applied to discriminate signal events from cosmic ray and beam-halo muon backgrounds. In the absence of an excess of events, improved limits are set on gluino, stop, and sbottom masses for different decays, lifetimes, and neutralino masses. With a neutralino of mass 100 GeV, the analysis excludes gluinos with mass below 832 GeV (with an expected lower limit of 731 GeV), for a gluino lifetime between 10 microseconds and 1000 s in the generic R-hadron model with equal branching ratios for decays to qqbar+neutralino and gluino+neutralino. Under the same assumptions for the neutralino mass and squark lifetime, top squarks and bottom squarks in the Regge R-hadron model are excluded with masses below 379 and 344 GeV, respectively.
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Dates et versions

in2p3-00876570 , version 1 (21-09-2023)

Identifiants

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G. Aad, S. Albrand, J. Brown, Q. Buat, B. Clement, et al.. Search for long-lived stopped R-hadrons decaying out-of-time with pp collisions using the ATLAS detector. Physical Review D, 2013, 88, pp.112003. ⟨10.1103/PhysRevD.88.112003⟩. ⟨in2p3-00876570⟩
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