Inclusive e+e− pair production in p+p and p+Nb collisions at Ekin = 3.5 GeV

M Weber ,T Liu,A Blanco ,A Kożuch ,A Krása ,A Mangiarotti ,A Schmah ,B Kämpfer ,C Müntz ,Christian Sturm ,D González-Díaz ,E Epple ,F Křížek ,H Ströbele ,I Fröhlich ,I Köenig ,J A Garzón ,J Siebenson ,J Wüstenfeld ,K Lapidus ,L Fabbietti ,L Lopes ,M Böhmer ,M Jurkovič ,M Pałka ,P Fonte ,P K Kurilkin ,P Tlustý ,R Krücken ,R Kötte ,R Trębacz ,W Kühn ,А Куглер ,P Finocchiaro ,A Rustamov ,B Kolb ,J Stroth ,M Traxler ,R Holzmann ,S Lang ,S Yurevich ,V Pechenov ,W Koenig ,L Naumann ,A Belyaev ,A Ierusalimov ,A Kurilkin ,G Agakishiev ,O Fateev ,S Chernenko ,T Vasiliev ,V P Ladygin ,A Tarantola ,J Markert ,J Michel ,J Pietraszko ,K Teilab ,M Lorenz ,O Pechenova ,T Galatyuk ,Y Pachmayer ,J Friese ,L Maier ,P Huck ,V Metag ,A Dybczak ,B Michalska ,G Korcyl ,H Kuc ,P Salabura ,W Przygoda ,A Ivashkin ,A Kurepin ,A Reshetin ,A Sadovsky ,F Guber ,M Golubeva ,T Karavicheva ,H Tsertos ,Y Parpottas ,B Ramstein ,M Gumberidze ,T Hennino ,V Wagner ,Yu G Sobolev ,D Belver ,G Kornakov ,P Cabanelas ,S Spataro ,Y Zanevsky

doi:10.1088/1742-6596/316/1/012007

Inclusive e+e− pair production in p+p and p+Nb collisions at Ekin = 3.5 GeV

M Weber , T Liu + Show 88 more

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https://doi.org/10.1088/1742-6596/316/1/012007

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Journal: Journal of Physics: Conference Series	Publication Date: Sep 16, 2011
Citations: 3	License type: cc-iop-open

Affiliation: Technical University of Munich, University of Paris-Sud, GSI Helmholtz Centre for Heavy Ion Research, Joint Institute for Nuclear Research, Goethe University Frankfurt, University of Giessen, Jagiellonian University, Russian Academy of Sciences, University of Santiago de Compostela

#Nb Collisions #Proton Nucleus Collisions + Show 8 more

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Abstract

We report on recent data of e+e− pair emission in proton nucleus collisions at energies above the light vector meson production thresholds. Invariant mass distributions for the p+Nb system at Ekin = 3.5 GeV are compared to data from elementary p+p reactions at the same beam energy. We observe a constant π0/ω yield ratio for both systems but an excess in the mass region above the π0 mass. Furthermore we present here the normalization procedure that was applied to p+Nb collisions by measuring the production of negative pions in the HADES acceptance.

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