SCALE-VIOLATION EFFECTS IN LARGE-PT DIRECT PHOTON PRODUCTION

被引：42

作者：

CONTOGOURIS, AP ^{[1
]}

PAPADOPOULOS, S ^{[1
]}

HONGOH, M ^{[1
]}

机构：

[1] UNIV MONTREAL,CTR RECH MATE,MONTREAL H3C 3J7,QUEBEC,CANADA

来源：

PHYSICAL REVIEW D | 1979年 / 19卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.19.2607

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The contribution of the quantum-chromodynamic (QCD) perturbation diagrams q+g→γ+q and q+q̄→γ+g (where q,g,q̄ denote quark, gluon, antiquark) to large-pT direct γ production is studied in detail. It is shown that inclusion of QCD scale violations in the q, g, and q̄ distributions reduces the predicted yield for p+p→γ+X by one order of magnitude. At s=53 GeV and pT10 GeV, with the experimental inclusive cross section Edσ(p+p→π0+X)d3p∼10-36 cm2 GeV-2, the contribution of these diagrams if found to give a ratio of γ to π0 of 5-15%. © 1979 The American Physical Society.

引用

页码：2607 / 2611

页数：5

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