Confirmation of a soft photon signal in excess of Q.E.D. expectations in pi p interactions at 280 GeV/c

Abstract

Photons produced in pi p interactions at 280 GeV/c were detected by reconstructing the e+e- pairs produced via the materialisation of the photons in a 1 mm thick lead sheet placed in front of the MWPCs of the OMEGA spectrometer at CERN. A soft photon signal 7.8 +/- 1.5 times the Q.E.D. inner bremsstrahlung prediction was observed confirming the results of a previous experiment.

11 pages, Latex, 3 Figures plus layout figure

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