Abstract
We present an improved determination of the strange quark and anti-quark parton distribution functions of the proton by means of a global QCD analysis that takes into account a comprehensive set of strangeness-sensitive measurements: charm-tagged cross sections for fixed-target neutrino-nucleus deep-inelastic scattering, and cross sections for inclusive gauge-boson production and $W$-boson production in association with light jets or charm quarks at hadron colliders. Our analysis is accurate to next-to-next-to leading order in perturbative QCD and specifically includes charm-quark mass corrections to neutrino-nucleus structure functions. We find that a good overall description of the input dataset can be achieved and that a strangeness moderately suppressed in comparison to the rest of the light sea quarks is strongly favored by the global analysis.
| Original language | English |
|---|---|
| Article number | 1168 |
| Pages (from-to) | 1-17 |
| Number of pages | 17 |
| Journal | European Physical Journal C. Particles and Fields |
| Volume | 80 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 19 Dec 2020 |
Bibliographical note
5 pages + supplementary material, 13 figures, PDF sets available from http://nnpdf.mi.infn.it/nnpdf3-1strangeness/Keywords
- hep-ph
- hep-ex
- hep-lat
- nucl-th
