The NLO inclusive forward hadron production in pA collisions

被引：1

作者：

Chirilli, Giovanni ^{[1
]}

Xiao, Bo-Wen ^{[2
,3
]}

Yuan, Feng ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA

[2] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China

[3] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

来源：

NUCLEAR PHYSICS A | 2013年 / 904卷

关键词：

COLOR GLASS CONDENSATE; DEUTERON-GOLD COLLISIONS; SATURATION PHYSICS; LARGE NUCLEI; SMALL-X; SCATTERING; QCD;

D O I：

10.1016/j.nuclphysa.2013.02.147

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Recently, the one-loop factorization for inclusive hadron productions in pA collisions in the saturation formalism has been established via the complete next-to-leading order calculation. The differential cross section is written into a factorization form in the coordinate space at the next-to-leading order, while the naive form of the convolution in the transverse momentum space does not hold. The rapidity divergence with small-x dipole gluon distribution of the nucleus is factorized into the energy evolution of the dipole gluon distribution function, which is known as the Balitsky-Kovchegov equation. Furthermore, the collinear divergences associated with the incoming parton distribution of the nucleon and the outgoing fragmentation function of the final state hadron are factorized into the splittings of the associated parton distribution and fragmentation functions, which allows us to reproduce the well-known DGLAP equation. The hard coefficient function, which is finite and free of divergence of any kind, is evaluated at one-loop order. This result is important, not only for the phenomenological applications to the inclusive hadron production in p-A collisions at RHIC and future LHC experiment, but also for theoretically promoting the rigorous developments towards factorizations in small-x physics.

引用

页码：841C / 844C

页数：4

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