Sensitivity of the LHC isolated-γ + jet data to the parton distribution functions of the proton
Articolo
Data di Pubblicazione:
2013
Citazione:
Sensitivity of the LHC isolated-γ + jet data to the parton distribution functions of the proton / L. Carminati, G. Costa, D. D'Enterria, I. Koletsou, G. Marchiori, J. Rojo, M. Stockton, F. Tartarelli. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - 101:6(2013), pp. 61002.1-61002.6. [10.1209/0295-5075/101/61002]
Abstract:
We study the impact of differential isolated-photon + jet cross sections measured in proton-proton collisions at a center-of-mass energy of root 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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
High Energy Physics - Phenomenology; High Energy Physics - Phenomenology; High Energy Physics - Experiment
Elenco autori:
L. Carminati, G. Costa, D. D'Enterria, I. Koletsou, G. Marchiori, J. Rojo, M. Stockton, F. Tartarelli
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