Abstract
Photons produced in pp interactions at 450 GeV/c were detected by reconstructing the e(+)e(-) 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 +/- 0. 8 times the inner bremsstrahlung prediction was observed in the forward rapidity region (y(c.m.s). greater than or equal to 1.2), thus extending the domain of the anomalous soft photon effect seen already in K(+)p, pi(+) p and pi(-) p interactions. (C) 2002 Elsevier Science B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 129-139 |
Number of pages | 11 |
Journal | Physics Letters B |
Volume | 548 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 21 Nov 2002 |
Keywords
- Bremsstrahlung
- photon excess
- soft photons
- pp interactions