| Thème(s) : |
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Physique/Physique des Hautes Energies - Expérience
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| Titre : |
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Search for extra dimensions in diphoton events from proton-proton collisions at $\sqrt {s} = 7$ TeV in the ATLAS detector at the LHC |
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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, L. Aperio Bella3, B. Aubert3, N. Berger3, J. Colas3, M. Delmastro3, L. Di Ciaccio3, T.K.O. Doan3, S. Elles3, C. Goy3, T. Hryn'Ova3, S. Jézéquel3, M. Kataoka3, J. Labbe3, R. Lafaye3, J. Leveque3, V.P. Lombardo3, N. Massol3, P. Perrodo3, E. Petit3, H. Przysiezniak3, E. Richter-Was3, G. Sauvage3, E. Sauvan3, M. Schwoerer3, T. Todorov3, D. Tsionou3, I. Wingerter-Seez3, R. Zitoun3, S. Abdel Khalek4, H. Abreu4, N. Andari4, C. Arnault4, E. Augé4, P. Barrillon4, M. Benoit4, S. Binet4, C. Bourdarios4, C. de La Taille4, J.B. De Vivie De Regie4, L. Duflot4, M. Escalier4, L. Fayard4, D. Fournier4, J.-F. Grivaz4, S. Henrot-Versillé4, J. Hrivnac4, L. Iconomidou-Fayard4, J. Idarraga4, M. Kado4, N. Lorenzo Martinez4, A. Lounis4, N. Makovec4, P. Matricon4, F. Niedercorn4, L. Poggioli4, P. Puzo4, A. Renaud4, D. Rousseau4, G. Rybkin4, J.B. Sauvan4, J. Schaarschmidt4, A.C. Schaffer4, L. Serin4, S. Simion4, R. Tanaka4, M. Teinturier4, J.J. Veillet4, I. Vukotic4, F. Wicek4, D. Zerwas4, Z. Zhang4, D. Boumediene5, E. Busato5, D. Calvet5, S. Calvet5, R. Camacho Toro5, D. Cinca5, J. Donini5, R. Febbraro5, Ph. Gris5, N. Ghodbane5, C. Guicheney5, H. Liao5, D. Pallin5, D. Paredes Hernandez5, F. Podlyski5, C. Santoni5, F. Vazeille5, 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, S. Tisserant8, J. Toth8, F. Touchard8, 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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The large difference between the Planck scale and the electroweak scale, known as the hierarchy problem, is addressed in certain models through the postulate of extra spatial dimensions. A search for evidence of extra spatial dimensions in the diphoton channel has been performed using the full set of proton-proton collisions at sqrt(s) = 7 TeV recorded in 2011 with the ATLAS detector at the CERN Large Hadron Collider. This dataset corresponds to an integrated luminosity of 4.9 /fb. The diphoton invariant mass spectrum is observed to be in good agreement with the expected Standard Model background. 95% confidence level lower limits of between 2.52 TeV and 3.92 TeV are set on the Ms scale in the context of the model proposed by Arkani-Hamed, Dimopoulos and Dvali, depending on the number of extra dimensions and the theoretical formalism used. In the context of the Randall--Sundrum model, a lower limit of 1.00 (2.06) TeV at 95% confidence level is set on the mass of the lightest graviton for couplings of k/Mpl = 0.01 (0.1). Combining with the ATLAS dilepton searches based on the 2011 data, the 95% confidence level limit on the Randall--Sundrum graviton mass is further tightened to 1.03 (2.23) TeV for k/Mpl = 0.01 (0.1). |
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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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| Volume : |
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15 |
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| Page/Article : |
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043007 |
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| Identifiant local : |
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LPSC12310 |
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| Commentaire : |
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See paper for full list of authors - 9 pages plus author list (22 pages total), 4 figures, 4 tables, submitted to Physics Letters B All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2012-06/ |
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