Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x

被引：76

作者：

Zenaiev, O. ^{[1
]}

Geiser, A. ^{[1
]}

Lipka, K. ^{[1
]}

Bluemlein, J. ^{[1
]}

Cooper-Sarkar, A. ^{[2
]}

Garzelli, M. -V. ^{[3
]}

Guzzi, M. ^{[4
]}

Kuprash, O. ^{[1
]}

Moch, S. -O. ^{[3
]}

Nadolsky, P. ^{[5
]}

Placakyte, R. ^{[1
]}

Rabbertz, K. ^{[6
]}

Schienbein, I. ^{[7
]}

Starovoitov, P. ^{[1
]}

机构：

[1] DESY Hamburg & Zeuthen, Hamburg, Germany

[2] Univ Oxford, Oxford, England

[3] Univ Hamburg, Hamburg, Germany

[4] Univ Manchester, Sch Phys & Astron, Manchester, Lancs, England

[5] So Methodist Univ, Dallas, TX 75275 USA

[6] Karlsruher Inst Technol, Karlsruhe, Germany

[7] LPSC Grenoble, Grenoble, France

来源：

EUROPEAN PHYSICAL JOURNAL C | 2015年 / 75卷 / 08期

关键词：

3-LOOP SPLITTING FUNCTIONS; DEEP-INELASTIC SCATTERING; QUARK PRODUCTION; QCD CORRECTIONS; FRAGMENTATION FUNCTIONS; LEADING ORDER; POLE MASS; COLLISIONS; DENSITIES; EVOLUTION;

D O I：

10.1140/epjc/s10052-015-3618-z

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：

The impact of recent measurements of heavy-flavour production in deep inelastic ep scattering and in pp collisions on parton distribution functions is studied in a QCD analysis in the fixed-flavour number scheme at next-to-leading order. Differential cross sections of charm- and beauty-hadron production measured by LHCb are used together with inclusive and heavy-flavour production cross sections in deep inelastic scattering at HERA. The heavy-flavour data of the LHCb experiment impose additional constraints on the gluon and the sea-quark distributions at low partonic fractions x of the proton momentum, down to x similar to 5x10(-6). This kinematic range is currently not covered by other experimental data in perturbative QCD fits.

引用

页数：12

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