Impact of heavy quark masses on parton distributions and LHC phenomenology

被引：269

作者：

Ball, Richard D. ^{[3
]}

Bertone, Valerio ^{[4
]}

Cerutti, Francesco ^{[5
]}

Del Debbio, Luigi ^{[3
]}

Forte, Stefano ^{[1
,2
]}

Guffanti, Alberto ^{[4
]}

Latorre, Jose I. ^{[5
]}

Rojo, Juan ^{[1
,2
]}

Ubiali, Maria ^{[6
]}

机构：

[1] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[2] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[3] Univ Edinburgh, Sch Phys & Astron, JCMB, Edinburgh EH9 3JZ, Midlothian, Scotland

[4] Univ Freiburg, Inst Phys, D-79104 Freiburg I B, Germany

[5] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

[6] Rhein Westfal TH Aachen, Inst Theoret Teilchenphys & Kosmol, D-52056 Aachen, Germany

来源：

NUCLEAR PHYSICS B | 2011年 / 849卷 / 02期

关键词：

Parton distributions; Quantum chromodynamics; LHC; Collider physics; DEUTERON STRUCTURE FUNCTIONS; D-ASTERISK(+/-) MESON PRODUCTION; HIGH STATISTICS MEASUREMENT; DEEP-INELASTIC SCATTERING; PROTON STRUCTURE-FUNCTION; CHARM PRODUCTION; MUON SCATTERING; LEPTOPRODUCTION;

D O I：

10.1016/j.nuclphysb.2011.03.021

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：

We present a determination of the parton distributions of the nucleon from a global set of hard scattering data using the NNPDF methodology including heavy quark mass effects: NNPDF2.1. In comparison to the previous NNPDF2.0 parton determination, the dataset is enlarged to include deep-inelastic charm structure function data. We implement the FONLL-A general-mass scheme in the FastKernel framework and assess its accuracy by comparison to the Les Houches heavy quark benchmarks. We discuss the impact on parton distributions of the treatment of the heavy quark masses, and we provide a determination of the uncertainty in the parton distributions due to uncertainty in the masses. We assess the impact of these uncertainties on LHC observables by providing parton sets with different values of the charm and bottom quark masses. Finally, we construct and discuss parton sets with a fixed number of flavors. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：296 / 363

页数：68

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