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Search for pair production of first or second generation leptoquarks in proton-proton collisions at sqrt(s)=7 TeV using the ATLAS detector at the LHC

By G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, S. Crépé-Renaudin, P. De Saintignon, P.A. Delsart, J. Donini, D. Dzahini, J.Y. Hostachy, E. Laisne, F. Ledroit-Guillon, A. Lleres, A. Lucotte, F. Malek, P. Martin, F. Polci, J. Stark, X. Sun, B. Trocmé, H. Bachacou, F. Bauer, N. Besson, N.M. Bolnet, M. Boonekamp, L. Chevalier, J. Ernwein, A.I. Etienvre, A. Formica, L. Gauthier, F. Giraud, C. Guyot, S. Hassani, W. Kozanecki, E. Lancon, J.F. Laporte, E. Le Menedeu, M. Legendre, B. Lenzi, B. Mansoulie, J.-P. Meyer, N. Morange, R. Nicolaidou, A. Ouraou, D.M. Pomarede, B. Resende, C.R. Royon, Ph. Schune, J. Schwindling, O. Simard, M. Virchaux, J. Yu, C. Biscarat, E. Cogneras, G. Rahal, C. Bee, C. Benchouk, K. Bernardet, N. Boussons, J. C. Clèmens, Y. Coadou, P. Delpierre, F. Djama, F. Etienne, L. Feligioni, F. Henry- Couannier, D. Hoffmann, F. Hubaut, E. B. F. G. Knoops, E. Le Guirriec, B. Li, E. Monnier, J. Odier, E. Petit, P. Pralavorio, Z. Qian, A. Rozanov, M. Talby, N. Tannoury, S. Tisserant, J. Toth, F. Touchard, L. Vacavant, S. Aoun, Emmanuel Busato, D. Calvet, S. Calvet, Reina Coromoto Camacho Toro, Diane Cinca, P.-O. Defay, R. Febbraro, N. Ghodbane, P. Gris, C. Guicheney, D. Pallin, F. Podlyski, C. Santoni, L. P. Says, F. Vazeille, S. Viret, T. Beau, S. Bordoni, G. Calderini, A. Camard, P. Cavalleri, E. Chareyre, S. De Cecco, F. Derue, D. Imbault, M.W. Krasny, D. Lacour, B. Laforge, O. Le Dortz, J. Lellouch, G. Marchiori, I. Nikolic-Audit, J. Ocariz, M. Ridel, L. Roos, Ph. Schwemling, Timothée Theveneaux-Pelzer, S. Trincaz-Duvoid, T.N. Trinh, F. Vannucci, L. Aperio-Bella, B. Aubert, N. Berger, J. Colas, L. Di Ciaccio, T.K.O. Doan, M. El Kacimi, S. Elles, P. Ghez, M. Gouanère, C. Goy, T. Guillemin, L. Helary, T. Hryn'Ova, P. Iengo, G. Ionescu, A. Jérémie, S. Jézéquel, M. Kataoka, J. Labbe, R. Lafaye, J. Levêque, N. Massol, P. Perrodo, H. Przysiezniak, G. Sauvage, T. Todorov, D. Tsionou, I. Wingerter-Seez, R. Zitoun, Y. Zolnierowski, H. Abreu, C. Arnault, E. Augé, P. Barrillon, M. Benoit, S. Binet, J.-B. Blanchard, C. Bourdarios, D. Breton, C. Collard, C. De La Taille, J.B. De Vivie De Regie, S. Diglio, F. Dudziak, L. Duflot, M. Escalier, A.C. Falou, L. Fayard, D. Fournier, J.-F. Grivaz, M. Heller, S. Henrot-Versillé, J. Hrivnac, L. Iconomidou-Fayard, J. Idarraga, M. Kado, A. Lounis, N. Makovec, P. Matricon, Y. Nakahama, F. Niedercorn, L. Poggioli, P. Puzo, A. Renaud, D. Rousseau, X. Ruan, G. Rybkin, J.B. Sauvan, J. Schaarschmidt, A.C. Schaffer, L. Serin, S. Simion, R. Tanaka, D. Varouchas, J.J. Veillet, I. Vukotic, F. Wicek, D. Zerwas, Zhen Zhang, M. Kuna and Sandrine LAPLACE

Abstract

See paper for full list of authors - 14 pages plus author list (26 pages total), 6 figures, 6 tables, submitted to Phys. Rev. DThis paper describes searches for the pair production of first or second generation scalar leptoquarks using 35/pb of proton-proton collision data recorded by the ATLAS detector at sqrt(s)=7 TeV. Leptoquarks are seached in events with two oppositely charged muons or electrons and at least two jets, and in events with one muon or electron, missing transverse momentum and at least two jets. After event selection, the observed yields are consistent with the predicted backgrounds. Leptoquark production is excluded at the 95% CL for masses mLQ<376 (319) GeV and mLQ<422 (362) GeV for first and second generation scalar leptoquarks, respectively, when assuming the branching fraction of a leptoquark to a charged lepton is equal to 1.0 (0.5)

Topics: [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: American Physical Society
Year: 2011
DOI identifier: 10.1103/PhysRevD.83.112006
OAI identifier: oai:HAL:in2p3-00590607v1
Provided by: Hal-Diderot
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