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Sensitivity of the LHC isolated-gamma+jet data to the parton distribution functions of the proton
We study the impact of differential isolated-photon+jet cross sections measured in proton-proton collisions at a center-of-mass energy of sqrt{s} = 7 TeV on the parton distribution functions (PDF) of the proton. Next-to-leading order perturbative QCD (pQCD) calculations complemented with the NNPDF2....
| Autores principales: | , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2012
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1209/0295-5075/101/61002 http://cds.cern.ch/record/1502302 |
| _version_ | 1780927103614582784 |
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| author | Carminati, L. Costa, G. D'Enterria, D. Koletsou, I. Marchiori, G. Rojo, J. Stockton, M. Tartarelli, F. |
| author_facet | Carminati, L. Costa, G. D'Enterria, D. Koletsou, I. Marchiori, G. Rojo, J. Stockton, M. Tartarelli, F. |
| author_sort | Carminati, L. |
| collection | CERN |
| description | We study the impact of differential isolated-photon+jet cross sections measured in proton-proton collisions at a center-of-mass energy of sqrt{s} = 7 TeV on the parton distribution functions (PDF) of the proton. Next-to-leading order perturbative QCD (pQCD) calculations complemented with the NNPDF2.1 parton densities, and a Bayesian PDF reweighting method are employed. We find that although the current data provide only mild constraints to the parton densities, future gamma-jet measurements with reduced experimental uncertainties can improve our knowledge of the gluon density over a wide range of parton fractional momenta x as well as of the quarks at low-x. |
| id | cern-1502302 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2012 |
| record_format | invenio |
| spelling | cern-15023022019-10-04T11:32:17Zdoi:10.1209/0295-5075/101/61002http://cds.cern.ch/record/1502302engCarminati, L.Costa, G.D'Enterria, D.Koletsou, I.Marchiori, G.Rojo, J.Stockton, M.Tartarelli, F.Sensitivity of the LHC isolated-gamma+jet data to the parton distribution functions of the protonParticle Physics - PhenomenologyWe study the impact of differential isolated-photon+jet cross sections measured in proton-proton collisions at a center-of-mass energy of sqrt{s} = 7 TeV on the parton distribution functions (PDF) of the proton. Next-to-leading order perturbative QCD (pQCD) calculations complemented with the NNPDF2.1 parton densities, and a Bayesian PDF reweighting method are employed. We find that although the current data provide only mild constraints to the parton densities, future gamma-jet measurements with reduced experimental uncertainties can improve our knowledge of the gluon density over a wide range of parton fractional momenta x as well as of the quarks at low-x.arXiv:1212.5511CERN-PH-TH-2013-006oai:cds.cern.ch:15023022012-12-24 |
| spellingShingle | Particle Physics - Phenomenology Carminati, L. Costa, G. D'Enterria, D. Koletsou, I. Marchiori, G. Rojo, J. Stockton, M. Tartarelli, F. Sensitivity of the LHC isolated-gamma+jet data to the parton distribution functions of the proton |
| title | Sensitivity of the LHC isolated-gamma+jet data to the parton distribution functions of the proton |
| title_full | Sensitivity of the LHC isolated-gamma+jet data to the parton distribution functions of the proton |
| title_fullStr | Sensitivity of the LHC isolated-gamma+jet data to the parton distribution functions of the proton |
| title_full_unstemmed | Sensitivity of the LHC isolated-gamma+jet data to the parton distribution functions of the proton |
| title_short | Sensitivity of the LHC isolated-gamma+jet data to the parton distribution functions of the proton |
| title_sort | sensitivity of the lhc isolated-gamma+jet data to the parton distribution functions of the proton |
| topic | Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1209/0295-5075/101/61002 http://cds.cern.ch/record/1502302 |
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