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Search for Direct Gamma Production at Low Transverse Momentum in 63-GeV pp Collisions

Åkesson, T. LU orcid ; Almehed, Sverker LU ; Hedberg, V. LU ; Jarlskog, Göran LU ; Kulka, Karin ; Lörstad, Bengt LU and Willis, W. J. (1987) In Physical Review D 36(9). p.2615-2623
Abstract
We have searched for direct photons of low PT (≤1.0 GeV/c) at θc.m.=90° in pp collisions at √s =63 GeV. We used two independent methods: direct detection in NaI crystals and conversion to e+e− pairs. No signal is observed; the photon spectrum is well described by the decay of hadrons. The result is consistent with a direct low-PT photon signal reported at √s =12 GeV, but excludes a rapid growth of soft-photon production with √s .
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author
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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D
volume
36
issue
9
pages
2615 - 2623
publisher
American Physical Society
external identifiers
  • scopus:4243906452
ISSN
2470-0010
DOI
10.1103/PhysRevD.36.2615
language
English
LU publication?
yes
id
dfe1c8a3-bfb7-4675-a5b6-79fedcc902f7
date added to LUP
2019-05-17 10:17:08
date last changed
2025-10-14 11:41:23
@article{dfe1c8a3-bfb7-4675-a5b6-79fedcc902f7,
  abstract     = {{We have searched for direct photons of low PT (≤1.0 GeV/c) at θc.m.=90° in pp collisions at √s =63 GeV. We used two independent methods: direct detection in NaI crystals and conversion to e+e− pairs. No signal is observed; the photon spectrum is well described by the decay of hadrons. The result is consistent with a direct low-PT photon signal reported at √s =12 GeV, but excludes a rapid growth of soft-photon production with √s .}},
  author       = {{Åkesson, T. and Almehed, Sverker and Hedberg, V. and Jarlskog, Göran and Kulka, Karin and Lörstad, Bengt and Willis, W. J.}},
  issn         = {{2470-0010}},
  language     = {{eng}},
  number       = {{9}},
  pages        = {{2615--2623}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review D}},
  title        = {{Search for Direct Gamma Production at Low Transverse Momentum in 63-GeV pp Collisions}},
  url          = {{http://dx.doi.org/10.1103/PhysRevD.36.2615}},
  doi          = {{10.1103/PhysRevD.36.2615}},
  volume       = {{36}},
  year         = {{1987}},
}