Recent progress on the study of nucleon structure from lattice QCD and future perspectives

Submission summary

 As Contributors: Constantia Alexandrou Preprint link: scipost_201911_00039v1 Date accepted: 2020-01-09 Date submitted: 2019-11-23 Submitted by: Alexandrou, Constantia Submitted to: SciPost Physics Proceedings Proceedings issue: 24th European Few Body Conference (University of Surrey, U.K.) Discipline: Physics Subject area: Quantum Physics

Abstract

We review the progress achieved within the last five years in the simulations of lattice QCD, as well as in the analysis for selected quantities probing nucleon structure. In particular, we discuss results on the nucleon electromagnetic form factors, $\sigma$-terms, the momentum fraction carried b quark in the nucleon and the helicity and transversity. All quantities are obtained using simulations generated with quark masses fixed to their physical values. In addition, we review the on-going effort to extract parton distribution functions (PDFs) directly from lattice QCD using the quasi-PDFs approach.

Published as SciPost Phys. Proc. 3, 015 (2020)

Submission & Refereeing History

Submission scipost_201911_00039v1 on 23 November 2019

Reports on this Submission

Report 1 by Paul Stevenson on 2020-1-8 Contributed Report

• Cite as: Paul Stevenson, Report on arXiv:scipost_201911_00039v1, delivered 2020-01-08, doi: 10.21468/SciPost.Report.1497

Report

Recent progress on the study of nucleon structure from lattice QCD and future perspectives by Alexandrou The paper is a well-written review of recent progress in lattice QCD for nucleons, and a suitable representation of the conference talk from the EFB24 conference, and should be published essentially as is. A list of typos noticed during evaluation is given below. These can be fixed in the production stage

Requested changes

p1: in abstract "the momentum fraction carried b quark in the nucleon [...]" (?) p1: last line "that related" -> "that are related" p2: "these different formulations should all agreed" -> "these different formulations should all agree" p2: "at fix quark masses" -> "at fixed quark masses" p4: "This requires simulations at least three values of a" -> "This requires simulations at at least three values of a" P5: "In order to calculate matrix elements one compute" -> "In order to calculate matrix elements one computes" p6: "since the electromagnetic current is conversed" -> "since the electromagnetic current is conserved" (?) p8: "GPDs can be decomposed Lorentz invariant functions [...]" -> "GPDs can be decomposed as Lorentz invariant functions" (? or "into") p9: "Beyond the single favor [...]" -> "Beyond the single flavor" (?) p9: "paying a significant role" -> "playing a significant role"

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