TY - JOUR
TI - OBSERVATION OF DIRECT SOFT PHOTON PRODUCTION IN PI-P INTERACTIONS AT 280
GEV/C
AU - BANERJEE, S
AU - BARBERIS, D
AU - BELOGIANNI, A
AU - BEUSCH, W and
AU - BRODBECK, TJ
AU - FRENCH, BR
AU - GOLDSCHMIDTCLERMONT, Y
AU - GRABOWSKI, M
AU - and KERRES, U
AU - KNUDSON, K
AU - MORRIS, JAG
AU - PEREPELITSA, V and
AU - QUERCIGH, E
AU - SONDEREGGER, P
AU - SPYROPOULOUSTASSINAKI, M and
AU - SUBRAMANIAN, A
AU - VASSILIADIS, G
AU - VICHOU, I
AU - WEIGEND, A and
AU - WILSON, GW
JO - PHYSICS LETTERS B
PY - 1993
VL - 305
TODO - 1-2
SP - 182-186
PB - ELSEVIER SCIENCE BV
SN - 0370-2693
TODO - 10.1016/0370-2693(93)91126-8
TODO - null
TODO - The OMEGA spectrometer, equipped with a hydrogen target and two
electromagnetic calorimeters, was used to investigate the production of
soft gammas in hadronic collisions. The E(gamma) and P(T) distributions
of the measured gamma’s are compared with the corresponding
distributions of gamma’s arising from hadronic decays and of gamma’s
expected from QED inner bremsstrahlung. An excess of gammas by a factor
of 7.9 +/- 1.4 over the QED prediction is measured in the low energy
(0.2 < E(gamma) < 1.0 GeV) and low P(T) (< 10 MeV/c) kinematic region,
and confirms the original observation of a similar effect in a bubble
chamber experiment.
ER -