Impact of heavy quark masses on parton distributions and LHC phenomenology

Richard Ball; Valerio Bertone; Francesco Cerutti; Luigi Del Debbio; Stefano Forte; Alberto Guffanti; Jose latorre; Juan Rojo; Maria Ubiali

doi:10.1016/j.nuclphysb.2011.03.021

Impact of heavy quark masses on parton distributions and LHC phenomenology

Richard Ball, Valerio Bertone, Francesco Cerutti, Luigi Del Debbio, Stefano Forte, Alberto Guffanti, Jose latorre, Juan Rojo, Maria Ubiali

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

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 flavours.

Original language	English
Pages (from-to)	296-363
Number of pages	68
Journal	Nuclear physics b
Volume	849
Issue number	2
DOIs	https://doi.org/10.1016/j.nuclphysb.2011.03.021
Publication status	Published - 11 Aug 2011

Keywords

Parton distributions
Quantum chromodynamics
LHC
Collider physics
DEEP-INELASTIC-SCATTERING
DEUTERON STRUCTURE FUNCTIONS
D-ASTERISK(+/-) MESON PRODUCTION
HIGH STATISTICS MEASUREMENT
PROTON STRUCTURE-FUNCTION
CHARM PRODUCTION
MUON SCATTERING
HIGH Q2
HERA
QCD

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10.1016/j.nuclphysb.2011.03.021

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arXiv version
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http://www.sciencedirect.com/science/article/pii/S0550321311001842

Cite this

@article{f70c7ba6ed254c9f82430699441259f5,

title = "Impact of heavy quark masses on parton distributions and LHC phenomenology",

abstract = "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 flavours.",

keywords = "Parton distributions, Quantum chromodynamics, LHC, Collider physics, DEEP-INELASTIC-SCATTERING, DEUTERON STRUCTURE FUNCTIONS, D-ASTERISK(+/-) MESON PRODUCTION, HIGH STATISTICS MEASUREMENT, PROTON STRUCTURE-FUNCTION, CHARM PRODUCTION, MUON SCATTERING, HIGH Q2, HERA, QCD",

author = "Richard Ball and Valerio Bertone and Francesco Cerutti and {Del Debbio}, Luigi and Stefano Forte and Alberto Guffanti and Jose latorre and Juan Rojo and Maria Ubiali",

note = "75 pages, 47 figures. Typos in Tab.2 (N_dat) and Eq.(70) corrected",

year = "2011",

month = aug,

day = "11",

doi = "10.1016/j.nuclphysb.2011.03.021",

language = "English",

volume = "849",

pages = "296--363",

journal = "Nuclear physics b",

issn = "0550-3213",

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T1 - Impact of heavy quark masses on parton distributions and LHC phenomenology

AU - Ball, Richard

AU - Bertone, Valerio

AU - Cerutti, Francesco

AU - Del Debbio, Luigi

AU - Forte, Stefano

AU - Guffanti, Alberto

AU - latorre, Jose

AU - Rojo, Juan

AU - Ubiali, Maria

N1 - 75 pages, 47 figures. Typos in Tab.2 (N_dat) and Eq.(70) corrected

PY - 2011/8/11

Y1 - 2011/8/11

N2 - 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 flavours.

AB - 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 flavours.

KW - Parton distributions

KW - Quantum chromodynamics

KW - LHC

KW - Collider physics

KW - DEEP-INELASTIC-SCATTERING

KW - DEUTERON STRUCTURE FUNCTIONS

KW - D-ASTERISK(+/-) MESON PRODUCTION

KW - HIGH STATISTICS MEASUREMENT

KW - PROTON STRUCTURE-FUNCTION

KW - CHARM PRODUCTION

KW - MUON SCATTERING

KW - HIGH Q2

KW - HERA

KW - QCD

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U2 - 10.1016/j.nuclphysb.2011.03.021

DO - 10.1016/j.nuclphysb.2011.03.021

M3 - Article

VL - 849

SP - 296

EP - 363

JO - Nuclear physics b

JF - Nuclear physics b

SN - 0550-3213

IS - 2

ER -

Impact of heavy quark masses on parton distributions and LHC phenomenology

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Keywords

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Particle Theory at the Tait Institute

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Impact of heavy quark masses on parton distributions and LHC phenomenology

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Keywords

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Particle Theory at the Tait Institute

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