Constraints on parton distributions and the strong coupling from LHC jet data

Juan Rojo*

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Jet production at hadron colliders provides powerful constraints on the parton distribution functions (PDFs) of the proton, in particular on the gluon PDF. Jet production can also be used to extract the QCD coupling αs(Q) and to test its running with the momentum transfer up to the TeV region. In this review, I summarize the information on PDFs and the strong coupling that has been provided by Run I LHC jet data. First of all, I discuss why jet production is directly sensitive to the gluon and quark PDFs at large-x, and then review the state-of-the-art perturbative calculations for jet production at hadron colliders and the corresponding fast calculations required for PDF fitting. Then I present the results of various recent studies on the impact on PDFs, in particular the gluon, that have been performed using as input jet measurements from ATLAS and CMS. I also review the available determinations of the strong coupling constant based on ATLAS and CMS jet data, with emphasis on the fact that LHC jet data provides, for the first time, a direct test of the αs(Q) running at the TeV scale. I conclude with a brief outlook on possible future developments.

Original languageEnglish
Article number1546005
JournalInternational Journal of Modern Physics A
Volume30
Issue number31
DOIs
Publication statusPublished - 10 Nov 2015
Externally publishedYes

Funding

I am grateful to Gunther Dissertori for the invitation to write this review and to Ste-fano Carrazza, Stefano Forte for their suggestions and to Amanda Cooper-Sarkar, Sasha Glazov, Claire Gwenlan, Panos Kokkas, Klaus Rabbertz and Alessandro Tri-coli for their comments on the manuscript and for information on the ATLAS and CMS jet measurements. This work has been supported by an STFC Rutherford Fellowship ST/K005227/1 and by the European Research Council with the Starting Grant “PDF4BSM”.

Keywords

  • Jet physics
  • parton distributions
  • QCD
  • strong coupling

Fingerprint

Dive into the research topics of 'Constraints on parton distributions and the strong coupling from LHC jet data'. Together they form a unique fingerprint.

Cite this