SEARCH FOR DIRECT PHOTON PRODUCTION IN 200 AND 300 GEV-C PROTON-BERYLLIUM INTERACTIONS

被引：29

作者：

BALTRUSAITIS, RM ^{[1
]}

BINKLEY, M ^{[1
]}

COX, B ^{[1
]}

KONDO, T ^{[1
]}

MURPHY, CT ^{[1
]}

YANG, W ^{[1
]}

ETTLINGER, L ^{[1
]}

GOODMAN, MS ^{[1
]}

MATTHEWS, JAJ ^{[1
]}

NAGY, J ^{[1
]}

机构：

[1] JOHNS HOPKINS UNIV,DEPT PHYS,BALTIMORE,MD 21218

来源：

PHYSICS LETTERS B | 1979年 / 88卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(79)90489-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search has been made for direct photon production in pBe interactions at 200 and 300 GeV/c over the kinematic region 1.5 < P⊥ < 4.0 GeV/c and -0.7 < XF < 0 (90° < θcms < 160°). An excess of single photons above that which is predicted from the measured π0 and η0 production is observed. Theratio of γ/π0 production is calculated assuming that the excess arises from direct photon production. We find that this ratio averages 0.070 ± 0.025 (including systematic errors) in this region of XF and P⊥ for our 200 and 300 GeV/c data. We have used our measured value of the η/π0 ratio of 0.47 ± 0.10 in the determination of the γ/π0 ratio. The variation of γ/π0 with XF, P⊥, XR and θcms presented. © 1979.

引用

页码：372 / 378

页数：7

共 21 条

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