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

被引：25
作者：
Belogianni, A
Beusch, W
Brodbeck, TJ
Evans, D
French, BR
Ganoti, P
Jacholkowski, A
Kinson, JB
Kirk, A
Lenti, V
Loconsole, RA
Manzari, V
Minashvili, I
Perepelitsa, VF [1 ]
Russakovich, N
Sonderegger, P
Spyropoulou-Stassinaki, M
Tchlatchidze, G
Vassiliadis, G
Vichou, I
Baillie, OV
机构：
[1] CERN, Div EP, CH-1211 Geneva 23, Switzerland
[2] Univ Athens, Dept Phys Nucl, Athens, Greece
[3] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland
[4] Univ Lancaster, Dept Phys, Lancaster, England
[5] Univ Birmingham, Dept Phys, Birmingham B15 2TT, W Midlands, England
[6] Univ Bari, Dipartimento Fis, Bari, Italy
[7] Sezione INFN, Bari, Italy
[8] JINR, Dubna, Russia
[9] ITEP, Moscow, Russia
来源：
PHYSICS LETTERS B | 2002年 / 548卷 / 3-4期
关键词：
soft photons; pi(-)p interactions; Bremsstrahlung; photon excess;
D O I：
10.1016/S0370-2693(02)02836-8
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
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收藏
页码：122 / 128
页数：7
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