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Proton Mass Decomposition from the QCD Energy Momentum Tensor

Yang, Yi-Bo ; Liang, Jian ; Bi, Yu-Jiang ; Chen, Ying ; Draper, Terrence ; Liu, Keh-Fei ; Liu, Zhaofeng

Physical review letters, 2018-11, Vol.121 (21), p.212001-212001, Article 212001 [Periódico revisado por pares]

United States: American Physical Society

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  • Título:
    Proton Mass Decomposition from the QCD Energy Momentum Tensor
  • Autor: Yang, Yi-Bo ; Liang, Jian ; Bi, Yu-Jiang ; Chen, Ying ; Draper, Terrence ; Liu, Keh-Fei ; Liu, Zhaofeng
  • Assuntos: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; Decomposition ; Domain walls ; Fermions ; Momentum ; NUCLEAR PHYSICS AND RADIATION PHYSICS ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; Protons ; Quarks ; Tensors
  • É parte de: Physical review letters, 2018-11, Vol.121 (21), p.212001-212001, Article 212001
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    Extreme Science and Engineering Discovery Environment (XSEDE)
    USDOE Office of Science (SC), Nuclear Physics (NP)
    DOE-UKY-13065-1808.08677
    National Science Foundation of China (NSFC)
    AC05-00OR22725; SC0013065
  • Descrição: We report results on the proton mass decomposition and also on related quark and glue momentum fractions. The results are based on overlap valence fermions on four ensembles of N_{f}=2+1 domain wall fermion configurations with three lattice spacings and three volumes, and several pion masses including the physical pion mass. With fully nonperturbative renormalization (and universal normalization on both quark and gluon), we find that the quark energy and glue field energy contribute 32(4)(4)% and 36(5)(4)% respectively in the MS[over ¯] (modified minimal substraction) scheme at μ=2  GeV. A quarter of the trace anomaly gives a 23(1)(1)% contribution to the proton mass based on the sum rule, given 9(2)(1)% contribution from the u, d, and s quark scalar condensates. The u, d, s, and glue momentum fractions in the MS[over ¯] scheme are in good agreement with global analyses at μ=2  GeV.
  • Editor: United States: American Physical Society
  • Idioma: Inglês
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