Search for extra dimensions in diphoton events using proton-proton collisions recorded at √s = 7 TeV with the ATLAS detector at the LHC

0424587 - FZÚ 2014 RIV DE eng J - Journal Article
Aad, G. - Abajyan, T. - Abbott, B. - Böhm, Jan - Chudoba, Jiří - Gallus, Petr - Gunther, Jaroslav - Jakoubek, Tomáš - Juránek, Vojtěch - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Marčišovský, Michal - Mikeštíková, Marcela - Myška, Miroslav - Němeček, Stanislav - Růžička, Pavel - Schovancová, Jaroslava - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Tic, Tomáš - Valenta, J. - Vrba, Václav - Zeman, Martin … Total 2905 authors
Search for extra dimensions in diphoton events using proton-proton collisions recorded at √s = 7 TeV with the ATLAS detector at the LHC.
New Journal of Physics. Roč. 15, č. 4 (2013), "043007-1"-"043007-9". ISSN 1367-2630. E-ISSN 1367-2630
R&D Projects: GA MŠMT LA08032
Institutional support: RVO:68378271
Keywords : higher-dimensional * photon photon * mass spectrum * measured * final state * two-photon * graviton * mass * upper limit * scattering * ATLAS * CERN LHC
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.671, year: 2013

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 Standard Model expectation. In the context of the model proposed by Arkani-Hamed, Dimopoulos and Dvali, 95% confidence level lower limits of between 2.52 TeV and 3.92 TeV are set on the ultraviolet cutoff scale Ms depending on the number of extra dimensions and the theoretical formalism used.
Permanent Link: http://hdl.handle.net/11104/0230649