Further analysis of a direct soft photon excess in π⁻ p interactions at 280 GeV/c

A Belogianni; David Evans; John Kinson; Andrew Kirk; Orlando Villalobos Baillie

doi:10.1016/S0370-2693(02)02836-8

Further analysis of a direct soft photon excess in π⁻ p interactions at 280 GeV/c

A Belogianni, David Evans, John Kinson, Andrew Kirk, Orlando Villalobos Baillie

Physics and Astronomy

Research output: Contribution to journal › Article

16 Citations (Scopus)

Abstract

In this Letter we present additional experimental characteristics of anomalous soft photon radiation observed in pi(-)p interactions at 280 GeV/c in the CERN experiment WA91, together with a re-calculated ratio of the observed direct soft photon signal to the expected level of the hadronic inner bremsstrahlung, which is found to be 5.3 +/- 1.0. The other presented characteristics, energy dependence and angular distributions of direct soft photons, show the similarity of the observed signal to the expected hadronic bremsstrahlung behaviour. (C) 2002 Elsevier Science B.V. All rights reserved.

Original language	English
Pages (from-to)	122-128
Number of pages	7
Journal	Physics Letters B
Volume	548
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(02)02836-8
Publication status	Published - 21 Nov 2002

Keywords

Bremsstrahlung
photon excess
pi(-)p interactions
soft photons

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10.1016/S0370-2693(02)02836-8

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title = "Further analysis of a direct soft photon excess in π⁻ p interactions at 280 GeV/c",

abstract = "In this Letter we present additional experimental characteristics of anomalous soft photon radiation observed in pi(-)p interactions at 280 GeV/c in the CERN experiment WA91, together with a re-calculated ratio of the observed direct soft photon signal to the expected level of the hadronic inner bremsstrahlung, which is found to be 5.3 +/- 1.0. The other presented characteristics, energy dependence and angular distributions of direct soft photons, show the similarity of the observed signal to the expected hadronic bremsstrahlung behaviour. (C) 2002 Elsevier Science B.V. All rights reserved.",

keywords = "Bremsstrahlung, photon excess, pi(-)p interactions, soft photons",

author = "A Belogianni and David Evans and John Kinson and Andrew Kirk and {Villalobos Baillie}, Orlando",

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T1 - Further analysis of a direct soft photon excess in π⁻ p interactions at 280 GeV/c

AU - Belogianni, A

AU - Evans, David

AU - Kinson, John

AU - Kirk, Andrew

AU - Villalobos Baillie, Orlando

PY - 2002/11/21

Y1 - 2002/11/21

N2 - In this Letter we present additional experimental characteristics of anomalous soft photon radiation observed in pi(-)p interactions at 280 GeV/c in the CERN experiment WA91, together with a re-calculated ratio of the observed direct soft photon signal to the expected level of the hadronic inner bremsstrahlung, which is found to be 5.3 +/- 1.0. The other presented characteristics, energy dependence and angular distributions of direct soft photons, show the similarity of the observed signal to the expected hadronic bremsstrahlung behaviour. (C) 2002 Elsevier Science B.V. All rights reserved.

AB - In this Letter we present additional experimental characteristics of anomalous soft photon radiation observed in pi(-)p interactions at 280 GeV/c in the CERN experiment WA91, together with a re-calculated ratio of the observed direct soft photon signal to the expected level of the hadronic inner bremsstrahlung, which is found to be 5.3 +/- 1.0. The other presented characteristics, energy dependence and angular distributions of direct soft photons, show the similarity of the observed signal to the expected hadronic bremsstrahlung behaviour. (C) 2002 Elsevier Science B.V. All rights reserved.

KW - Bremsstrahlung

KW - photon excess

KW - pi(-)p interactions

KW - soft photons

UR - http://www.scopus.com/inward/record.url?scp=0037153117&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(02)02836-8

DO - 10.1016/S0370-2693(02)02836-8

M3 - Article

VL - 548

SP - 122

EP - 128

JO - Physics Letters B

JF - Physics Letters B

IS - 3-4

ER -

Further analysis of a direct soft photon excess in π⁻ p interactions at 280 GeV/c

Abstract

Keywords

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