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Search for signatures of extra dimensions in the diphoton mass spectrum at the large hadron colliderTumasyan, A; Frühwirth, R; Knapitsch, A; Lellouch, J; Caudron, J; De Jesus Damiao, D; Lelas, D; Kovac, M; Fedi, G; Voutilainen, M; Sillou, D; Salerno, R; Juillot, P; Mercier, D; Bondu, O; Chasserat, J; Chierici, R; El Mamouni, H; Mirabito, L; Edelhoff, M; Sprenger, D; Lingemann, J; Teyssier, D; Oehler, A; Nishu, N; Manna, N; Buontempo, S; Carrillo Montoya, C A; Meneguzzo, A T; Ligabue, F; Serban, A T; Spagnolo, P; Arcidiacono, R; Costa, M; Montanino, D; Chung, J; Petrov, P; Qazi, S; Pela, J; Volodko, A; Dudko, L; Kodolova, O; Bayshev, I; Uzunian, A; Milosevic, J; Aguilar-Benitez, M; Puerta Pelayo, J; Vizan Garcia, J M; Munoz Sanchez, F J; Dupont-Sagorin, N; Pimiä, M; Sibille, J; Freudenreich, K; Sanchez, A K; Theofilatos, K; Li, S W; Lin, W; Williams, T; Ball, G; Della Negra, M; Virdee, T; Wardrope, D; Martin, W; Hatakeyama, K; Ferapontov, A; Sharma, V; Sudano, E; Campagnari, C; Geffert, P; Duarte, J; Carroll, R; Jang, D W; Alexander, J; Sun, W; Bakken, J A; Gutsche, O; Maruyama, S; Yang, F; Prosper, H; Bai, Y; Callner, J; Strom, D; Ozok, F; Guo, Z J; Rossato, K; Bauer, G; Cali, I A; Luckey, P D; Paus, C; Stöckli, F; Rusack, R; Summers, D; Avdeeva, E; Ofierzynski, R A; Zuranski, A; Hollingsworth, M; Yang, Z C; Velkovska, J; Sakharov, A; Weinberg, M
Physical review letters, 03/2012, Volume: 108, Issue: 11Journal Article
A search for signatures of extra spatial dimensions in the diphoton invariant-mass spectrum has been performed with the CMS detector at the LHC. No excess of events above the standard model expectation is observed using a data sample collected in proton-proton collisions at √s=7 TeV corresponding to an integrated luminosity of 2.2 fb(-1). In the context of the large-extra-dimensions model, lower limits are set on the effective Planck scale in the range of 2.3-3.8 TeV at the 95% confidence level. These limits are the most restrictive bounds on virtual-graviton exchange to date. The most restrictive lower limits to date are also set on the mass of the first graviton excitation in the Randall-Sundrum model in the range of 0.86-1.84 TeV, for values of the associated coupling parameter between 0.01 and 0.10.
