Gauld, Rhorry

Rojo, Juan

English

The small-$x$ gluon in global fits of parton distributions is affected by large uncertainties from the lack of direct experimental constraints. In this work we provide a precision determination of the small-$x$ gluon from the exploitation of forward charm production data provided by LHCb for three different centre-of-mass (CoM) energies: 5~TeV, 7~TeV and 13~TeV. The LHCb measurements are included in the PDF fit by means of normalized distributions and cross-section ratios between data taken at different CoM values, $R_{13/7}$ and $R_{13/5}$. We demonstrate that forward charm production leads to a reduction of the PDF uncertainties of the gluon down to $x\simeq 10^{-6}$ by up to an order of magnitude, with implications for high-energy colliders, cosmic ray physics and neutrino astronomy

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Precision determination of the small-$x$ gluon from charm production at LHCb

https://research.vu.nl/ws/files/8997020/1610.09373v1

Precision determination of the small- $x$ gluon from charm production at LHCb

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Precision determination of the small-xxx gluon from charm production at LHCb

Abstract

Similar works

Full text

Available Versions

VU Research Portal

Precision determination of the small- $x$ gluon from charm production at LHCb