Reconsideration of the inclusive prompt photon production at the LHC with kT-factorization

被引：18

作者：

Lipatov, A. V. ^{[1
,2
]}

Malyshev, M. A. ^{[1
]}

机构：

[1] Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia

[2] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

来源：

PHYSICAL REVIEW D | 2016年 / 94卷 / 03期

关键词：

HEAVY-QUARK PRODUCTION; PARTON DISTRIBUTIONS; PERTURBATION-THEORY; PHYSICS; QCD;

D O I：

10.1103/PhysRevD.94.034020

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We reconsider the inclusive production of isolated prompt photons in pp collisions at the LHC energies in the framework of k(T)-factorization approach. Our analysis is based on the O(alpha alpha(s)) off-shell ( depending on the transverse momenta of initial quarks and gluons) production amplitudes of q* g* -> gamma q and q* (q*) over bar -> gamma g partonic subprocesses and transverse momentum dependent (or unintegrated) quark and gluon densities in a proton, which are chosen in accordance with the Kimber-Martin-Ryskin prescription. We show that the subleading high-order O(alpha alpha(2)(s)) contributions, not covered by the noncollinear evolution of parton densities, are important to describe latest LHC data.

引用

页数：9

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