Search for light scalar top quark pair production in final states with two leptons with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions

G. Aad; S. Aoun; C. P. Bee; C. Bertella; N. Bousson; J. C. Clémens; Y. Coadou; F. Djama; F. Etienne; L. Feligioni; D. Hoffmann; F. Hubaut; E. B. F. G. Knoops; E. Le Guirriec; B. Li; J. Maurer; E. Monnier; J. Odier; P. Pralavorio; A. Rozanov; M. Talby; N. Tannoury; S. Tisserant; J. Toth; F. Touchard; L. Vacavant; L. Aperio Bella; B. Aubert; N. Berger; J. Colas; M. Delmastro; L. Di Ciaccio; T.K.O. Doan; S. Elles; C. Goy; T. Hryn'Ova; S. Jézéquel; M. Kataoka; J. Labbe; R. Lafaye; J. Leveque; V.P. Lombardo; N. Massol; P. Perrodo; E. Petit; H. Przysiezniak; G. Sauvage; E. Sauvan; M. Schwoerer; T. Todorov; D. Tsionou; I. Wingerter-Seez; R. Zitoun; S. Albrand; M.L. Andrieux; Q. Buat; B. Clement; J. Collot; S. Crépé-Renaudin; B. Dechenaux; T. Delemontex; P.A. Delsart; M.H. Genest; J.Y. Hostachy; E. Laisne; F. Ledroit-Guillon; A. Lleres; A. Lucotte; F. Malek; J. Stark; X. Sun; B. Trocmé; J. Wang; C. Weydert; F. Vannucci; S. Abdel Khalek; H. Abreu; N. Andari; C. Arnault; E. Augé; P. Barrillon; M. Benoit; S. Binet; C. Bourdarios; C. De La Taille; J.B. De Vivie de Regie; L. Duflot; M. Escalier; L. Fayard; D. Fournier; J.-F. Grivaz; S. Henrot-Versillé; J. Hrivnac; L. Iconomidou-Fayard; J. Idarraga; M. Kado; N. Lorenzo Martinez; A. Lounis; N. Makovec; P. Matricon; F. Niedercorn; L. Poggioli; P. Puzo; A. Renaud; D. Rousseau; G. Rybkin; J.B. Sauvan; J. Schaarschmidt; A.C. Schaffer; L. Serin; S. Simion; R. Tanaka; M. Teinturier; J.J. Veillet; I. Vukotic; F. Wicek; D. Zerwas; Zhen Zhang; D. Boumediene; Emmanuel Busato; D. Calvet; S. Calvet; Reina Coromoto Camacho Toro; Diane Cinca; J. Donini; R. Febbraro; N. Ghodbane; C. Guicheney; H. Liao; D. Pallin; Daniela Paredes Hernández; F. Podlyski; C. Santoni; F. Vazeille

doi:10.1140/epjc/s10052-012-2237-1

Search for light scalar top quark pair production in final states with two leptons with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions

G. Aad S. Aoun ¹ C. P. Bee ¹ C. Bertella ¹ N. Bousson ¹ J. C. Clémens ¹ Y. Coadou ¹ F. Djama ¹ F. Etienne ¹ L. Feligioni ¹ D. Hoffmann ¹ F. Hubaut ¹ E. B. F. G. Knoops ¹ E. Le Guirriec ¹ B. Li ¹ J. Maurer ¹ E. Monnier ¹ J. Odier ¹ P. Pralavorio ¹ A. Rozanov ¹ M. Talby ¹ N. Tannoury ¹ S. Tisserant ¹ J. Toth ¹ F. Touchard ¹ L. Vacavant ¹ L. Aperio Bella ² B. Aubert ² N. Berger ² J. Colas ² M. Delmastro ² L. Di Ciaccio ² T.K.O. Doan ² S. Elles ² C. Goy ² T. Hryn'Ova ² S. Jézéquel ² M. Kataoka ² J. Labbe ² R. Lafaye ² J. Leveque ² V.P. Lombardo ² N. Massol ² P. Perrodo ² E. Petit ² H. Przysiezniak ² G. Sauvage ² E. Sauvan ² M. Schwoerer ² T. Todorov ² D. Tsionou ² I. Wingerter-Seez ² R. Zitoun ² S. Albrand ³ M.L. Andrieux ³ Q. Buat ³ B. Clement ³ J. Collot ³ S. Crépé-Renaudin ³ B. Dechenaux ³ T. Delemontex ³ P.A. Delsart ³ M.H. Genest ³ J.Y. Hostachy ³ E. Laisne ³ F. Ledroit-Guillon ³ A. Lleres ³ A. Lucotte ³ F. Malek ³ J. Stark ³ X. Sun ³ B. Trocmé ³ J. Wang ³ C. Weydert ³ F. Vannucci ⁴ S. Abdel Khalek ⁵ H. Abreu ⁵ N. Andari ⁵ C. Arnault ⁵ E. Augé ⁵ P. Barrillon ⁵ M. Benoit ⁵ S. Binet ⁵ C. Bourdarios ⁵ C. De La Taille ⁵ J.B. De Vivie de Regie ⁵ L. Duflot ⁵ M. Escalier ⁵ L. Fayard ⁵ D. Fournier ⁵ J.-F. Grivaz ⁵ S. Henrot-Versillé ⁵ J. Hrivnac ⁵ L. Iconomidou-Fayard ⁵ J. Idarraga ⁵ M. Kado ⁵ N. Lorenzo Martinez 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 G. Rybkin ⁵ J.B. Sauvan ⁵ J. Schaarschmidt ⁵ A.C. Schaffer ⁵ L. Serin ⁵ S. Simion ⁵ R. Tanaka ⁵ M. Teinturier ⁵ J.J. Veillet ⁵ I. Vukotic ⁵ F. Wicek ⁵ D. Zerwas ⁵ Zhen Zhang ⁵ D. Boumediene ⁶ Emmanuel Busato ⁶ D. Calvet ⁶ S. Calvet ⁶ Reina Coromoto Camacho Toro ⁶ Diane Cinca ⁷ J. Donini ⁶ R. Febbraro ⁶ N. Ghodbane ⁶ C. Guicheney ⁶ H. Liao ⁶ D. Pallin ⁶ Daniela Paredes Hernández ⁶ F. Podlyski ⁶ C. Santoni ⁶ F. Vazeille ⁶

1 CPPM - Centre de Physique des Particules de Marseille

2 LAPP - Laboratoire d'Annecy-le-Vieux de Physique des Particules

3 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

4 APC - Neutrinos

APC - UMR 7164 - AstroParticule et Cosmologie, LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies

5 LAL - Laboratoire de l'Accélérateur Linéaire

6 LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]

7 Laboratoire de Physique Corpusculaire

LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]

Abstract : A search is presented for the pair production of light scalar top quarks in sqrt(s) = 7 TeV proton-proton collisions recorded with the ATLAS detector at the Large Hadron Collider. This analysis uses the full data sample collected during 2011 that corresponds to a total integrated luminosity of 4.7 fb-1. Light scalar top quarks are searched for in events with two opposite-sign leptons (e, mu), large missing transverse momentum and at least one jet in the final state. No excess over Standard Model expectations is found, and the results are interpreted under the assumption that the light scalar top decays to a b-quark in addition to an on-shell chargino whose decay occurs through a virtual W boson. If the chargino mass is 106 GeV, light scalar top quark masses up to 130 GeV are excluded for neutralino masses below 70 GeV.

Document type :

Journal articles

European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2012, 72, pp.2237. <10.1140/epjc/s10052-012-2237-1>

Domain :

Physics [physics] / High Energy Physics - Experiment [hep-ex]

http://hal.in2p3.fr/in2p3-00724634
Contributor : Danielle Cristofol <>
Submitted on : Wednesday, August 22, 2012 - 8:32:10 AM
Last modification on : Wednesday, September 28, 2016 - 4:13:58 PM

Search for light scalar top quark pair production in final states with two leptons with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions

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