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oai:ebyu-rdlopen.rawdatalibrary.net:ebyu/157162026-10-18T20:30:33Zopenairedrivercom_ebyu_10000col_ebyu_10001

Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at √s=7 TeVChatrchyan, S.Khachatryan, V.Sirunyan, A.M.Tumasyan, A.Adam, W.Aguilo, E.Bergauer, T.Dragicevic, M.Erö, J.Fabjan, C.Friedl, M.Frühwirth, R.Ghete, V.M.Hammer, J.Hörmann, N.Hrubec, J.Jeitler, M.Kiesenhofer, W.Knünz, V.Krammer, M.Krätschmer, I.Liko, D.Mikulec, I.Pernicka, M.Rahbaran, B.Rohringer, C.Rohringer, H.Schöfbeck, R.Strauss, J.Taurok, A.Waltenberger, W.Walzel, G.Widl, E.Wulz, C.-E.Mossolov, V.Shumeiko, N.Gonzalez, J. SuarezBansal, M.Bansal, S.Cornelis, T.De Wolf, E.A.Janssen, X.Luyckx, S.Mucibello, L.Ochesanu, S.Roland, B.Rougny, R.Selvaggi, M.Staykova, Z.Van Haevermaet, H.Hadron-Hadron ScatteringA search is performed for long-lived neutral particles decaying into a photon and invisible particles. An example of such a signature is the decay of the lightest neutralino with nonzero lifetime into a gravitino and a photon in gauge-mediated supersymmetry, with the neutralino as the next-to-lightest supersymmetric particle and the gravitino as the lightest. The search uses events containing photons, missing transverse energy, and jets. The impact parameter of the photon relative to the beam-beam collision point can be reconstructed using converted photons. The method is sensitive to lifetimes of the order of 0.1 to 1 ns. The data sample corresponds to an integrated luminosity of 2.23 fb-1 in pp collisions at √s=7 TeV, recorded in the first part of 2011 by the CMS experiment at the LHC. Cross-section limits are presented on pair production for such particles, each of which decays into a photon and invisible particles. The observed 95% confidence level limits vary between 0.11 and 0.21 pb, depending on the neutral particle lifetime.[Figure not available: see fulltext.] © 2012 CERN for the benefit of the CMS collaboration.Springer Verlag2012Articlehttps://rdlopen.rawdatalibrary.net/r/ebyu/15716https://doi.org/10.1007/jhep11(2012)1721126-6708enJournal of High Energy Physicsinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://ebyu-rdlopen.rawdatalibrary.net/tr/items/ebyu/15716