RELATIVISTIC CORRECTIONS TO PHOTOPRODUCTION OF J/PSI

被引：43

作者：

JUNG, H ^{[1
]}

KRUCKER, D ^{[1
]}

GREUB, C ^{[1
]}

WYLER, D ^{[1
]}

机构：

[1] UNIV ZURICH,INST THEORET PHYS,CH-8001 ZURICH,SWITZERLAND

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1993年 / 60卷 / 04期

关键词：

D O I：

10.1007/BF01558402

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We consider various models for photoproduction of J/psi on protons, based on the well-known photon-gluon fusion mechanism. We show that relativistic corrections to the J/psi bound state lead to a better description of the EMC and NMC data, especially in the high z region (z > 0.8) where the naive (nonrelativistic) colour singlet model breaks down (z is E(J/psi)/E(gamma) in the proton rest frame). As most of the events are expected in this domain, these corrections are important for extracting the gluon distribution function from the data. We also discuss diffractive J/psi production and a heuristic model for elastic production.

引用

页码：721 / 729

页数：9

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