Freiburg 2008 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 27: QCD IV

T 27.7: Vortrag

Freitag, 7. März 2008, 15:35–15:50, KGI-HS 1021

Exclusive dilepton production with CMS at the LHC — Jonathan Hollar¹, Severine Ovyn², •Xavier Rouby², Jerome de Favereau², Yanwen Liu², Jeffrey Gronberg¹, Monika Grothe³, and Krzysztof Piotrzkowski² — ¹Livermore National Laboratory (LLNL), USA — ²Universite Catholique de Louvain (UCL), Belgium — ³University of Wisconsin, Madison, USA

Exclusive dimuon and dielectron production with no significant additional activity in the CMS detector occurs with high cross section in gamma-mediated processes at the LHC. The pure QED process gamma gamma -> ll provides a high-statistics calibration sample, e.g. for luminosity measurements. Photoproduction of Upsilon mesons is another copious source of exclusive dileptons. Already in 100pb-1 of integrated luminosity, the three Upsilon resonances will be clearly visible and their cross sections may be measured. We report about the results of Monte-Carlo studies on selecting exclusively produced dileptons with CMS.