Low x gluons determined by open charm production

2017/05/24 by E. G. de Oliveira, de Oliveira, E. G., A. D. Martin +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1705.08845

openalex publication_date 2017/05/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We use the LHCb data on the forward production of D mesons at 7, 13 and 5 TeV to make a direct determination of the gluon distribution, xg, at NLO in the 10^-5 \lesssim x \lesssim 10^-4 region. We first use a simple parametrization of the gluon density in each of the four transverse momentum intervals of the detected D mesons. Second, we use a double log parametrization to make a combined fit to all the LHCb D meson data. The values found for xg in the above x domain are of the similar magnitude (or a bit larger) than the central values of extrapolations of the gluons obtained by the global PDF analyses into this small x region. However, in contrast, we find xg has a weak dependence on x.

Citations

• Gluon PDF constraints from the ratio of forward heavy quark production at the LHC at √(S)=7 and 13 TeV

Related

• The small-x gluon from forward charm production: implications for a 100 TeV proton collider
• Gluon PDF constraints from the ratio of forward heavy quark production at the LHC at √(S)=7 and 13 TeV
• Probes of the small x gluon via exclusive J/psi and Upsilon
• Exclusive production of heavy quarkonia as a probe of the low x and low scale gluon PDF
• Gluon distributions in nuclei at small x: guidance from different models