| Thème(s) : |
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Physique/Physique des Hautes Energies - Expérience
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| Titre : |
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Search for contact interactions and large extra dimensions in dilepton events from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector |
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| Auteur : |
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G. Aad, S. Albrand1, M.L. Andrieux1, Q. Buat1, B. Clement1, J. Collot1, S. Crépé-Renaudin1, B. Dechenaux1, T. Delemontex1, P.A. Delsart1, M.H. Genest1, J.Y. Hostachy1, E. Laisne1, F. Ledroit-Guillon1, A. Lleres1, A. Lucotte1, F. Malek1, J. Stark1, X. Sun1, B. Trocmé1, J. Wang, C. Weydert1, C. Biscarat2, E. Cogneras2, G. Rahal2, S. Abdel Khalek3, H. Abreu3, N. Andari3, C. Arnault3, E. Augé3, P. Barrillon3, M. Benoit3, S. Binet3, C. Bourdarios3, C. de La Taille3, J.B. De Vivie De Regie3, L. Duflot3, M. Escalier3, L. Fayard3, D. Fournier3, J.-F. Grivaz3, S. Henrot-Versillé3, J. Hrivnac3, L. Iconomidou-Fayard3, J. Idarraga3, M. Kado3, N. Lorenzo Martinez3, A. Lounis3, N. Makovec3, P. Matricon3, F. Niedercorn3, L. Poggioli3, P. Puzo3, A. Renaud3, D. Rousseau3, G. Rybkin3, J.B. Sauvan3, J. Schaarschmidt3, A.C. Schaffer3, L. Serin3, S. Simion3, R. Tanaka3, M. Teinturier3, J.J. Veillet3, I. Vukotic3, F. Wicek3, D. Zerwas3, Z. Zhang3, D. Boumediene4, E. Busato4, D. Calvet4, S. Calvet4, R. Camacho Toro4, D. Cinca4, J. Donini4, R. Febbraro4, N. Ghodbane4, Ph. Gris4, C. Guicheney4, H. Liao4, D. Pallin4, D. Paredes Hernandez4, F. Podlyski4, C. Santoni4, F. Vazeille4, L. Aperio Bella5, B. Aubert5, N. Berger5, J. Colas5, M. Delmastro5, L. Di Ciaccio5, T.K.O. Doan5, S. Elles5, C. Goy5, T. Hryn'Ova5, S. Jézéquel5, M. Kataoka5, J. Labbe5, R. Lafaye5, J. Leveque5, V.P. Lombardo5, N. Massol5, P. Perrodo5, E. Petit5, H. Przysiezniak5, E. Richter-Was5, G. Sauvage5, E. Sauvan5, M. Schwoerer5, T. Todorov5, D. Tsionou5, I. Wingerter-Seez5, R. Zitoun5, F. Vannucci6, 7, S. Aoun8, C. P. Bee8, C. Bertella8, N. Bousson8, J. C. Clémens8, Y. Coadou8, F. Djama8, F. Etienne8, L. Feligioni8, D. Hoffmann8, F. Hubaut8, E. B. F. G. Knoops8, E. Le Guirriec8, B. Li8, J. Maurer8, E. Monnier8, J. Odier8, P. Pralavorio8, A. Rozanov8, M. Talby8, N. Tannoury8, E. Tiouchichine8, S. Tisserant8, J. Toth8, F. Touchard8, M. Ughetto8, L. Vacavant8 |
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| Laboratoire : |
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| équipe(s) de recherche : |
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APC - Neutrinos |
| Résumé : |
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A search for non-resonant new phenomena, originating from either contact interactions or large extra spatial dimensions, has been carried out using events with two isolated electrons or muons. These events, produced at the LHC in proton-proton collisions at sqrt(s) = 7 TeV, were recorded by the ATLAS detector. The data sample, collected throughout 2011, corresponds to an integrated luminosity of 4.9 and 5.0 fb-1 in the e+e- and mu+mu- channels, respectively. No significant deviations from the Standard Model expectation are observed. Using a Bayesian approach, 95% confidence limit lower limits ranging from 9.0 to 13.9 TeV are placed on the energy scale of llqq contact interactions in the left-left isoscalar model. Lower limits ranging from 2.3 to 3.9 TeV are also set on the string scale in large extra dimension models. After combination of these limits with results from a similar search in the diphoton channel, slightly more stringent limits are obtained. |
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| Collaboration/Projet : |
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ATLAS |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication
ou d'écriture : |
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2013 |
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| Nom du périodique : |
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| Physical Review D (Phys. Rev. D) |
| Publisher |
American Physical Society |
| ISSN |
1550-7998 (eISSN : 1550-2368) |
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| Volume : |
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87 |
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| Page/Article : |
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015010 |
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| Identifiant local : |
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LPSC12313 |
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| Commentaire : |
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See paper for full list of authors - 12 pages plus author list (25 pages in total), 3 figures, 8 tables, submitted to Phys.Rev.D, all figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2012-17/ |
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