Charm and beauty quark masses in the MMHT2014 global PDF analysis

Harland-Lang, L.A.; Martin, A.D.; Motylinski, P.; Thorne, R.S.

Abstract

We investigate the variation in the MMHT2014 PDFs when we allow the heavy-quark masses mcmc and mbmb to vary away from their default values. We make PDF sets available in steps of Δmc=0.05 GeVΔmc=0.05 GeV and Δmb=0.25 GeVΔmb=0.25 GeV , and present the variation in the PDFs and in the predictions. We examine the comparison to the HERA data on charm and beauty structure functions and note that in each case the heavy-quark data, and the inclusive data, have a slight preference for lower masses than our default values. We provide PDF sets with three and four active quark flavours, as well as the standard value of five flavours. We use the pole mass definition of the quark masses, as in the default MMHT2014 analysis, but briefly comment on the MS¯¯¯¯¯¯¯MS¯ definition.

Citation

Harland-Lang, L., Martin, A., Motylinski, P., & Thorne, R. (2016). Charm and beauty quark masses in the MMHT2014 global PDF analysis. The European Physical Journal C, 76(1), Article 10. https://doi.org/10.1140/epjc/s10052-015-3843-5

• Journal Article Type: Article
• Acceptance Date: Dec 11, 2015
• Online Publication Date: Jan 6, 2016
• Publication Date: Jan 6, 2016
• Deposit Date: May 25, 2017
• Publicly Available Date: May 31, 2017
• Journal: European Physical Journal C: Particles and Fields
• Print ISSN: 1434-6044
• Electronic ISSN: 1434-6052
• Publisher: SpringerOpen
• Peer Reviewed: Peer Reviewed
• Volume: 76
• Issue: 1
• Article Number: 10
• DOI: https://doi.org/10.1140/epjc/s10052-015-3843-5
• Public URL: https://durham-repository.worktribe.com/output/1378248