Open charm production at the LHC: kt-factorization approach

被引：95

作者：

Maciula, Rafal ^{[1
]}

Szczurek, Antoni ^{[1
,2
]}

机构：

[1] Inst Nucl Phys PAN, PL-31342 Krakow, Poland

[2] Univ Rzeszow, PL-35959 Rzeszow, Poland

来源：

PHYSICAL REVIEW D | 2013年 / 87卷 / 09期

关键词：

HEAVY-QUARK PRODUCTION; DYNAMICAL PARTON DISTRIBUTIONS; FRAGMENTATION FUNCTIONS; QCD CORRECTIONS; CROSS-SECTION; D-ASTERISK(+/-); PROTONS; PIONS;

D O I：

10.1103/PhysRevD.87.094022

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss inclusive production of open charm in proton-proton scattering at LHC. The calculation is performed within the k(t)-factorization approach. Different models of unintegrated gluon distributions (UGDFs) from the literature are used. The theoretical transverse momentum as well as (pseudo) rapidity distributions of charmed mesons are compared with recent experimental data of the ATLAS, ALICE, and LHCb Collaborations. Only the calculation with Kimber-Martin-Ryskin UGDF gives results comparable to experimental ones. All other popular models of UGDF significantly underpredict experimental data. Several sources of uncertainties of the theoretical predictions are also studied in detail. In addition, we discuss correlations between D and (D) over bar mesons. Good description of experimental distribution in invariant mass and in relative azimuthal angle between D and (D) over bar mesons is achieved for the Kimber-Martin-Ryskin UGDF. The considered correlation observables measured by the LHCb experiment were not discussed in other approaches in the literature

引用

页数：23

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