作者
Serguei Chatrchyan, Vardan Khachatryan, Albert M Sirunyan, Armen Tumasyan, Wolfgang Adam, Thomas Bergauer, Marko Dragicevic, Janos Erö, Christian Fabjan, Markus Friedl, R Frühwirth, VM Ghete, J Hammer, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, D Liko, I Mikulec, M Pernicka, B Rahbaran, C Rohringer, H Rohringer, R Schöfbeck, J Strauss, A Taurok, P Wagner, W Waltenberger, G Walzel, E Widl, C-E Wulz, N Shumeiko, S Bansal, T Cornelis, EA De Wolf, X Janssen, S Luyckx, T Maes, L Mucibello, S Ochesanu, B Roland, R Rougny, M Selvaggi, Z Staykova, H Van Haevermaet, P Van Mechelen, A Van Spilbeeck, F Blekman, S Blyweert, J D’Hondt, R Gonzalez Suarez, A Kalogeropoulos, M Maes, A Olbrechts, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, B Clerbaux, G De Lentdecker, V Dero, APR Gay, T Hreus, A Léonard, PE Marage, T Reis, L Thomas, C Vander Velde, P Vanlaer, J Wang, V Adler, K Beernaert, A Cimmino, S Costantini, G Garcia, M Grunewald, B Klein, J Lellouch, A Marinov, J Mccartin, AA Ocampo Rios, D Ryckbosch, N Strobbe, F Thyssen, M Tytgat, L Vanelderen, P Verwilligen, S Walsh, E Yazgan, N Zaganidis, S Basegmez, G Bruno, R Castello, A Caudron, L Ceard, C Delaere, T du Pree, D Favart, L Forthomme, A Giammanco, J Hollar, V Lemaitre, J Liao, O Militaru, C Nuttens, D Pagano, L Perrini, A Pin, K Piotrzkowski, N Schul, N Beliy, T Caebergs, E Daubie, GH Hammad, GA Alves, M Correa Martins, D De Jesus Damiao, T Martins, ME Pol, MHG Souza, WL Aldá, W Carvalho, A Custódio, EM Da Costa, C De Oliveira Martins, S Fonseca De Souza, D Matos Figueiredo, L Mundim, H Nogima, V Oguri, WL Prado Da Silva, A Santoro, L Soares Jorge, A Sznajder, CA Bernardes, FA Dias, TR Fernandez Perez Tomei, EM Gregores, C Lagana, F Marinho, PG Mercadante, SF Novaes, Sandra S Padula, V Genchev, P Iaydjiev, S Piperov, M Rodozov, S Stoykova
发表日期
2012/11
期刊
Journal of High Energy Physics
卷号
2012
期号
11
页码范围
1-35
出版商
Springer-Verlag
简介
A search for exclusive or semi-exclusive γγ production, pp→ p (*)+ γγ+ p (*)(where p* stands for a diffractively-dissociated proton), and the observation of exclusive and semi-exclusive e+ e− production, pp→ p (*)+ e+ e−+ p (*), in proton-proton collisions at TeV, are presented. The analysis is based on a data sample corresponding to an integrated luminosity of 36 pb− 1 recorded by the CMS experiment at the LHC at low instantaneous luminosities. Candidate γγ or e+ e− events are selected by requiring the presence of two photons or a positron and an electron, each with transverse energy E T> 5. 5 GeV and pseudorapidity| η|< 2. 5, and no other particles in the region| η|< 5. 2. No exclusive or semi-exclusive diphoton candidates are found in the data. An upper limit on the cross section for the reaction pp→ p (*)+ γγ+ p (*), within the above kinematic selections, is set at 1.18 pb at 95% confidence level …
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