Cargando…

Testing nuclear parton distributions with pA collisions at the LHC

Global perturbative QCD analyses, based on large data sets from electron-proton and hadron collider experiments, provide tight constraints on the parton distribution function (PDF) in the proton. The extension of these analyses to nuclear parton distributions (nPDF) has attracted much interest in re...

Descripción completa

Detalles Bibliográficos
Autores principales: Quiroga-Arias, Paloma, Milhano, Jose Guilherme, Wiedemann, Urs Achim
Lenguaje:eng
Publicado: 2010
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.82.034903
http://cds.cern.ch/record/1240947
_version_ 1780918907563933696
author Quiroga-Arias, Paloma
Milhano, Jose Guilherme
Wiedemann, Urs Achim
author_facet Quiroga-Arias, Paloma
Milhano, Jose Guilherme
Wiedemann, Urs Achim
author_sort Quiroga-Arias, Paloma
collection CERN
description Global perturbative QCD analyses, based on large data sets from electron-proton and hadron collider experiments, provide tight constraints on the parton distribution function (PDF) in the proton. The extension of these analyses to nuclear parton distributions (nPDF) has attracted much interest in recent years. nPDFs are needed as benchmarks for the characterization of hot QCD matter in nucleus-nucleus collisions, and attract further interest since they may show novel signatures of non-linear density-dependent QCD evolution. However, it is not known from first principles whether the factorization of long-range phenomena into process-independent parton distribution, which underlies global PDF extractions for the proton, extends to nuclear effects. As a consequence, assessing the reliability of nPDFs for benchmark calculations goes beyond testing the numerical accuracy of their extraction and requires phenomenological tests of the factorization assumption. Here we argue that a proton-nucleus collision program at the LHC would provide a set of measurements allowing for unprecedented tests of the factorization assumption underlying global nPDF fits.
id cern-1240947
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
record_format invenio
spelling cern-12409472023-03-14T19:07:54Zdoi:10.1103/PhysRevC.82.034903http://cds.cern.ch/record/1240947engQuiroga-Arias, PalomaMilhano, Jose GuilhermeWiedemann, Urs AchimTesting nuclear parton distributions with pA collisions at the LHCParticle Physics - PhenomenologyGlobal perturbative QCD analyses, based on large data sets from electron-proton and hadron collider experiments, provide tight constraints on the parton distribution function (PDF) in the proton. The extension of these analyses to nuclear parton distributions (nPDF) has attracted much interest in recent years. nPDFs are needed as benchmarks for the characterization of hot QCD matter in nucleus-nucleus collisions, and attract further interest since they may show novel signatures of non-linear density-dependent QCD evolution. However, it is not known from first principles whether the factorization of long-range phenomena into process-independent parton distribution, which underlies global PDF extractions for the proton, extends to nuclear effects. As a consequence, assessing the reliability of nPDFs for benchmark calculations goes beyond testing the numerical accuracy of their extraction and requires phenomenological tests of the factorization assumption. Here we argue that a proton-nucleus collision program at the LHC would provide a set of measurements allowing for unprecedented tests of the factorization assumption underlying global nPDF fits.Global perturbative QCD analyses, based on large data sets from electron-proton and hadron collider experiments, provide tight constraints on the parton distribution function (PDF) in the proton. The extension of these analyses to nuclear parton distributions (nPDF) has attracted much interest in recent years. nPDFs are needed as benchmarks for the characterization of hot QCD matter in nucleus-nucleus collisions, and attract further interest since they may show novel signatures of non-linear density-dependent QCD evolution. However, it is not known from first principles whether the factorization of long-range phenomena into process-independent parton distribution, which underlies global PDF extractions for the proton, extends to nuclear effects. As a consequence, assessing the reliability of nPDFs for benchmark calculations goes beyond testing the numerical accuracy of their extraction and requires phenomenological tests of the factorization assumption. Here we argue that a proton-nucleus collision program at the LHC would provide a set of measurements allowing for unprecedented tests of the factorization assumption underlying global nPDF fits.arXiv:1002.2537CERN-PH-TH-2010-028CERN-PH-TH-2010-028oai:cds.cern.ch:12409472010-02-15
spellingShingle Particle Physics - Phenomenology
Quiroga-Arias, Paloma
Milhano, Jose Guilherme
Wiedemann, Urs Achim
Testing nuclear parton distributions with pA collisions at the LHC
title Testing nuclear parton distributions with pA collisions at the LHC
title_full Testing nuclear parton distributions with pA collisions at the LHC
title_fullStr Testing nuclear parton distributions with pA collisions at the LHC
title_full_unstemmed Testing nuclear parton distributions with pA collisions at the LHC
title_short Testing nuclear parton distributions with pA collisions at the LHC
title_sort testing nuclear parton distributions with pa collisions at the lhc
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevC.82.034903
http://cds.cern.ch/record/1240947
work_keys_str_mv AT quirogaariaspaloma testingnuclearpartondistributionswithpacollisionsatthelhc
AT milhanojoseguilherme testingnuclearpartondistributionswithpacollisionsatthelhc
AT wiedemannursachim testingnuclearpartondistributionswithpacollisionsatthelhc