An Update of the ABMP16 PDF Fit
S. Alekhin, J. Bluemlein, S. Moch

TL;DR
This paper updates the ABMP16 nucleon PDFs using recent LHC and HERA data, improving the fit and providing new insights into the strange quark and gluon distributions at small x.
Contribution
The paper introduces an updated ABMP16 PDF set incorporating new experimental data and refined analysis techniques, including photon-initiated processes.
Findings
Strange quark distribution is suppressed relative to non-strange at moderate x.
Small-x gluon distribution is enhanced compared to previous fit.
Good description of non-resonant $oldsymbol{ u}$-production data with photon-initiated processes.
Abstract
We present an updated version of the ABMP16 nucleon PDFs, which is tuned by using recent precise data on - and -production at the LHC and the final HERA data on DIS - and -quark production and by imposing a stringent -cut on the inclusive DIS data in order to avoid the impact of higher twist terms at small at HERA. The new - and -boson production data, in particular the updated version of the ATLAS data at the c.m.s. energy 7 TeV, are well accommodated into the present fit. The strange sea distribution obtained is consistent with the average of the up and down quark ones at small . However, it is still suppressed with respect to the non-strange one by a factor of at moderate . The small- gluon distribution is enhanced as compared to the previous ABMP16 fit, in line with updated data on the DIS -quark production. Finally, a good…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
