Quarkonium photoproduction at next-to-leading order

被引：60

作者：

Maltoni, F ^{[1
]}

Mangano, ML

Petrelli, A

机构：

[1] CERN, Div TH, CH-1211 Geneva, Switzerland

[2] Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy

[3] Univ Pisa, Dipartimento Fis, Pisa, Italy

来源：

NUCLEAR PHYSICS B | 1998年 / 519卷 / 1-2期

关键词：

quarkonium; radiative corrections; photoproduction; HERA;

D O I：

10.1016/S0550-3213(98)00048-0

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 present the calculation of O(alpha(s)(2) alpha(em)) corrections to heavy-quarkonium total photoproduction cross sections. Results are given for the colour-octet component of S and P waves. The calculation is performed using covariant projectors in dimensional regularization. A phenomenological study of the results, including a discussion of the high-energy behaviour of the cross sections, is presented. For gamma p energies up to few hundred GeV the NLO corrections significantly reduce the scale dependence of the production rates relative to the Born-level results. Large small-x corrections arise at higher energies, making the predictions strongly dependent on the shape of the gluon density and on the choice of factorization scale, (C) 1998 Elsevier Science B.V.

引用

页码：361 / 393

页数：33

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