Color-octet contributions to J/psi photoproduction

被引：154

作者：

Cacciari, M

Kramer, M

机构：

[1] Deutsches Elektronen-Synchrotron DESY, Hamburg

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.76.4128

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have calculated the leading color-octet contributions to the production of J/psi particles in photon-proton collisions. Using the values for the color-octet matrix elements extracted from fits to prompt J/psi data at the Fermilab Tevatron, we demonstrate that distinctive color-octet signatures should be visible in J/psi photoproduction. However, these predictions appear at variance with recent experimental data obtained at HERA, indicating that the phenomenological importance of the color-octet contributions is smaller than expected from theoretical considerations and suggested by the Fermilab Tevatron fits.

引用

页码：4128 / 4131

页数：4

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