Further analysis of a direct soft photon excess in $\pi^{-} p$ interactions at 280 GeV/c

In this Letter we present additional experimental characteristics of anomalous soft photon radiation observed in pi /sup -/ p interactions at 280 GeV/c in the CERN experiment WA91, together with a re- calculated ratio of the observed direct soft photon signal to the expected level of the hadronic in...

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Detalles Bibliográficos
Autores principales: Belogianni, A, Beusch, Werner, Brodbeck, T J, Evans, D, French, Bernard R, Ganoti, P, Jacholkowski, A, Kinson, J B, Kirk, A, Lenti, V, Loconsole, R A, Manzari, V, Minashvili, I A, Perepelitsa, V F, Rusakovitch, N A, Sonderegger, P, Spyropoulou-Stassinaki, M, Tchlatchidze, G A, Vassiliadis, G, Vichou, I, Villalobos Baillie, O
Lenguaje:eng
Publicado: 2002
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(02)02836-8
http://cds.cern.ch/record/623231
Descripción
Sumario:In this Letter we present additional experimental characteristics of anomalous soft photon radiation observed in pi /sup -/ p interactions at 280 GeV/c in the CERN experiment WA91, together with a re- calculated ratio of the observed direct soft photon signal to the expected level of the hadronic inner bremsstrahlung, which is found to be 5.3 +or- 1.0. The other presented characteristics, energy dependence and angular distributions of direct soft photons, show the similarity of the observed signal to the expected hadronic bremsstrahlung behaviour. (15 refs).

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