Improved constraints on parton distributions using LHCb, ALICE and HERA heavy-flavour measurements and implications for the predictions for prompt atmospheric-neutrino fluxes

被引：36

作者：

Zenaiev, O. ^{[1
,8
]}

Garzelli, M., V ^{[2
,3
,4
]}

Lipka, K. ^{[5
]}

Moch, S-O ^{[1
]}

Cooper-Sarkar, A. ^{[6
]}

Olness, F. ^{[7
]}

Geiser, A. ^{[5
]}

Sigl, G. ^{[1
]}

机构：

[1] Univ Hamburg, Inst Theoret Phys 2, Luruper Chaussee 149, D-22761 Hamburg, Germany

[2] Univ Firenze, Dipartimento Fis & Astron, Via Giovanni Sansone 1, I-50019 Florence, Italy

[3] INFN, Via Giovanni Sansone 1, I-50019 Florence, Italy

[4] Eberhard Karls Univ Tubingen, Inst Theoret Phys, Morgenstelle 14, D-72076 Tubingen, Germany

[5] DESY, Notkestr 85, D-22607 Hamburg, Germany

[6] Univ Oxford, Keble Rd, Oxford OX1 3RH, England

[7] Southern Methodist Univ, Box 0175, Dallas, TX 75275 USA

[8] CERN, CH-1211 Geneva 23, Switzerland

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2020年 / 2020卷 / 04期

关键词：

QCD Phenomenology; DEEP-INELASTIC SCATTERING; 3-LOOP SPLITTING FUNCTIONS; INCLUSIVE-JET; FRAGMENTATION FUNCTIONS; CHARM PRODUCTION; CROSS-SECTIONS; EVOLUTION; QCD; DENSITIES; SPECTRUM;

D O I：

10.1007/JHEP04(2020)118

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 measurements of heavy-flavour production in deep inelastic ep scattering and in pp collisions on parton distribution functions is studied in a QCD analysis at next-to-leading order. Recent combined results of inclusive and heavy-flavour produc- tion cross sections in deep inelastic scattering at HERA are investigated together with heavy-flavour production measurements at the LHC. Differential cross sections of charm- and beauty-hadron production measured by the LHCb collaboration at the centre-of-mass energies of 5, 7 and 13 TeV as well as the recent measurements of the ALICE experiment at the centre-of-mass energies of 5 and 7 TeV are explored. These data impose additional constraints on the gluon and the sea-quark distributions at low partonic fractions x of the proton momentum, down to x approximate to 10(-6). The impact of the resulting parton distribution function in the predictions for the prompt atmospheric-neutrino fluxes is studied.

引用

页数：27

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