Proton mass decomposition

Yi Bo Yang, Ying Chen, Terrence Draper, Jian Liang, Keh Fei Liu

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


We report the results on the proton mass decomposition and also on the related quark and glue momentum fractions. The results are based on overlap valence fermions on four ensembles of Nf = 2 + 1 DWF configurations with three lattice spacings and volumes, and several pion masses including the physical pion mass. With 1-loop pertur-bative calculation and proper normalization of the glue operator, we find that the u, d, and s quark masses contribute 9(2)% to the proton mass. The quark energy and glue field energy contribute 31(5)% and 37(5)% respectively in the MS scheme at μ = 2 GeV. The trace anomaly gives the remaining 23(1)% contribution. The u, d, s and glue momentum fractions in the MS scheme are consistent with the global analysis at μ = 2 GeV.

Original languageEnglish
Article number14002
JournalEPJ Web of Conferences
StatePublished - Mar 26 2018
Event35th International Symposium on Lattice Field Theory, Lattice 2017 - Granada, Spain
Duration: Jun 18 2017Jun 24 2017

Bibliographical note

Publisher Copyright:
© The Authors, published by EDP Sciences, 2018.

ASJC Scopus subject areas

  • General Physics and Astronomy


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