English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We analyze the impact of the recent HERA run I+II combination of inclusivedeep inelastic scattering cross-section data on the CT14 global analysis ofPDFs. New PDFs at NLO and NNLO, called CT14$_{\textrm{HERA2}}$, are obtained bya refit of the CT14 data ensembles, in which the HERA run I combinedmeasurements are replaced by the new HERA run I+II combination. The CT14functional parametrization of PDFs is flexible enough to allow gooddescriptions of different flavor combinations, so we use the sameparametrization for CT14$_{\textrm{HERA2}}$ but with an additional shapeparameter for describing the strange quark PDF. We find that the HERA I+II datacan be fit reasonably well, and both CT14 and CT14$_{\textrm{HERA2}}$ PDFs candescribe equally well the non-HERA data included in our global analysis.Because the CT14 and CT14$_{\textrm{HERA2}}$ PDFs agree well within the PDFerrors, we continue to recommend CT14 PDFs for the analysis of LHC Run 2experiments.

CTEQ-TEA parton distribution functions and HERA Run I and II combined data