Observation of a soft photon signal in excess of QED expectations in pp interactions

Photons produced in pp interactions at 450 GeV/c were detected by reconstructing the e/sup +/e/sup -/ pairs of photon conversions in a 1 mm thick lead sheet placed in front of the MWPCs of the OMEGA spectrometer at CERN. A soft photon signal 4.1 +or- 0.8 times the inner bremsstrahlung prediction was...

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Detalles Bibliográficos
Autores principales: Belogianni, A, Beusch, Werner, Brodbeck, T J, Dzheparov, F S, French, Bernard R, Ganoti, P, Kinson, J B, Kirk, A, Lenti, V, Minashvili, I A, Perepelitsa, V F, Rusakovitch, N A, Singovsky, A V, Sonderegger, P, Spyropoulou-Stassinaki, M, Villalobos Baillie, O
Lenguaje:eng
Publicado: 2002
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(02)02837-X
http://cds.cern.ch/record/623230
Descripción
Sumario:Photons produced in pp interactions at 450 GeV/c were detected by reconstructing the e/sup +/e/sup -/ pairs of photon conversions in a 1 mm thick lead sheet placed in front of the MWPCs of the OMEGA spectrometer at CERN. A soft photon signal 4.1 +or- 0.8 times the inner bremsstrahlung prediction was observed in the forward rapidity region (y/sub c.m.s/. >or= 1.2), thus extending the domain of the anomalous soft photon effect seen already in K/sup +/p, pi /sup +/ p and pi /sup -/ p interactions. (34 refs).

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