SOFT PHOTON PRODUCTION IN 450-GEV C P-BE COLLISIONS/

Authors
ANTOS J BEKER H BRONS S BUSSMANN K DAGAN S DREES A ERD C ESTEN MJ FABJAN CW GLASSEL P GOERLACH U HEDBERG V LISSAUER D MAZZONI MA MCCUBBIN NA NEUBERT M NEVSKI P OLSEN L PFEIFFER A RAY A SCHUKRAFT J SHAPIRA D SOLTANI J SPECHT HJ STUMER I THOMPSON J VEENHOF RJ WILLIS WJ WOODY C
Citation
J. Antos et al., SOFT PHOTON PRODUCTION IN 450-GEV C P-BE COLLISIONS/, Zeitschrift fur Physik. C, Particles and fields, 59(4), 1993, pp. 547-553
Citations number
30
Categorie Soggetti
Physics, Particles & Fields
Journal title
Zeitschrift fur Physik. C, Particles and fields → ACNP
ISSN journal
01709739
Volume
59
Issue
4
Year of publication
1993
Pages
547 - 553
Database
ISI
SICI code
0170-9739(1993)59:4<547:SPPI4C>2.0.ZU;2-G
Abstract
We have measured the inclusive p(T) spectra of soft photons produced a t central and backward rapidities in 450 GeV/c p-Be collisions down to 1 MeV/c in transverse momentum. In the region 1 < p(T) < 20 MeV/c an excess of photons over those expected from hadronic decays is observed . This excess is comparable, within systematic errors, with estimates of direct photons produced via hadronic bremsstrahlung. An upper limit is derived on the presence of additional sources of direct photons at small transverse momentum.