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Akdogan, T; Antonelli, M; Aoki, M; Arik, M; Arutinov, D; Åsman, B; Assamagan, K; Axen, D; Beck, H P; Bednyakov, V A; Benitez Garcia, J A; Bhimji, W; Biglietti, M; Blazek, T; Boonekamp, M; Bressler, S; Bruni, A; Bussey, P; Carvalho, J; Castaneda-Miranda, E; Castro, N F; Cavalli-Sforza, M; Chang, P; Chekulaev, S V; Chikovani, L; Christidi, I A; Citron, Z H; Coniavitis, E; Constantinescu, S; Conta, C; Cooper, B D; Cooper-Sarkar, A M; Corriveau, F; Cox, B E; Crépé-Renaudin, S; Dawe, E; Del Peso, J; Demichev, M; Dressnandt, N; Ehrenfeld, W; Ernst, M; Errede, S; Fedorko, W; Friedrich, C; Gallop, B J; Giorgi, F M; Giovannini, P; Gladilin, L K; Gorišek, A; Groth-Jensen, J; Gul, U; Guo, J; Hartert, J; Haug, S; Haywood, S J; Hernandez, C M; Hsu, P J; Huegging, F; Jakobs, K; Jovin, T; Khomich, A; Klingenberg, R; Klinger, J A; Klioutchnikova, T; Köneke, K; Korolkova, E V; Korotkov, V A; Kourkoumelis, C; La Rotonda, L; Lefebvre, M; Liang, Z; Lie, K; Limosani, A; Livermore, S S A; Loebinger, F K; Lorenzo Martinez, N; Lu, F; Majewski, S; Makida, Y; Makovec, N; Maleev, V P; Manning, P M; Martinez Outschoorn, V; Masik, J; McCubbin, N A; Melachrinos, C; Meng, Z; Messina, A; Nagasaka, Y; Negri, G; Negrini, M; Neusiedl, A; Orlando, N; Paganis, E; Pauly, T; Penning, B; Perez, K; Popeneciu, G A; Poulard, G; Pozdnyakov, V
New journal of physics, 04/2013, Letnik: 15, Številka: 4Journal Article
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).
