Improving quark flavor separation with forward W and Z production at LHCb

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We quantify the constraints on the flavour separation between the quarks and antiquarks in the proton provided by the recent forward weak gauge boson production data from the LHCb experiment at √s=7 and 8 TeV. Performed in the framework of the NNPDF3.1 global analysis, this study highlights the key role that the LHCb W and Z data have in achieving a robust quark flavour separation in the large-x region, including the strange and charm quarks. We demonstrate how the LHCb measurements lead to improved determinations of the the up and down quark PDFs in the region x≥0.1, with an uncertainty reduction that can be as large as a factor 2. We also show how the LHCb forward measurements severely restrict the size of the fitted charm PDF at large x, imposing stringent constraints on non-perturbative models for the charm content of the nucleon.
Original languageEnglish
Article number2017dis..confE.198R
Pages (from-to)0-5
Number of pages6
JournalProceedings of Science
Volume2017
Publication statusPublished - 12 May 2017

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Bibliographical note

5 pages, 5 figures, to appear in the proceedings of the XXV International Workshop on Deep-Inelastic Scattering and Related Subjects, 3-7 April 2017, University of Birmingham, UK

Keywords

  • hep-ph
  • hep-ex

Cite this

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Improving quark flavor separation with forward W and Z production at LHCb. / Rojo, Juan.

In: Proceedings of Science, Vol. 2017, 2017dis..confE.198R, 12.05.2017, p. 0-5.

Research output: Contribution to JournalArticleAcademicpeer-review

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