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

共 50 条

[21] Inclusive J/ψ photoproduction and polarization at HERA in the kT-factorization approach [J].

Baranov, S. P. ;

Lipatov, A. V. ;

Zotov, N. P. .

EUROPEAN PHYSICAL JOURNAL C, 2011, 71 (04) :1-14

[22] Possible saturation effects at HERA and LHC in the kT-factorization approach [J].

Kotikov, A. V. ;

Lipatov, A. V. ;

Zotov, N. P. .

MULTIPARTICLE DYNAMICS, 2006, 828 :365-+

[23] Inclusive prompt photon production in nuclear collisions at RHIC and LHC [J].

Arleo, Francois ;

Eskola, Kari J. ;

Paukkunen, Hannu ;

Salgado, Carlos A. .

JOURNAL OF HIGH ENERGY PHYSICS, 2011, (04)

[24] Production of Λc baryons at the LHC within the kT-factorization approach and independent parton fragmentation picture [J].

Maciula, Rafal ;

Szczurek, Antoni .

PHYSICAL REVIEW D, 2018, 98 (01)

[25] Prompt charmonia production and polarization at LHC in the NRQCD with kT-factorization. II. χc mesons [J].

Baranov, S. P. ;

Lipatov, A. V. ;

Zotov, N. P. .

PHYSICAL REVIEW D, 2016, 93 (09)

[26] Breakdown of kT-factorization and J/ψ production in dA collisions [J].

Tuchin, Kirill .

NUCLEAR PHYSICS A, 2011, 854 (01) :198-203

[27] Prompt hadroproduction of ηc(1S, 2S) in the kT-factorization approach [J].

Babiarz, Izabela ;

Pasechnik, Roman ;

Schafer, Wolfgang ;

Szczurek, Antoni .

JOURNAL OF HIGH ENERGY PHYSICS, 2020, 2020 (02)

[28] Deep inelastic beauty production at HERA in the kT-factorization approach [J].

Lipatov, Artem V. ;

Zotov, Nikolai P. .

JOURNAL OF HIGH ENERGY PHYSICS, 2006, (08)

[29] Hard scale uncertainty in collinear factorization: Perspective from kt-factorization [J].

Guiot, Benjamin .

PHYSICAL REVIEW D, 2018, 98 (01)

[30] Prompt charmonia production and polarization at the LHC in the NRQCD with kT-factorization. III. J/Ψ meson [J].

Baranov, S. P. ;

Lipatov, A. V. .

PHYSICAL REVIEW D, 2017, 96 (03)

← 1 2 3 4 5 →