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    Nucleon Spin and Momentum Decomposition Using Lattice QCD Simulations

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    1706.02973v3.pdf
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    Genre
    Pre-print
    Date
    2017-10-06
    Author
    Alexandrou, C
    Constantinou, M
    Hadjiyiannakou, K
    Jansen, K
    Kallidonis, C
    Koutsou, G
    Avilés-Casco, AV
    Wiese, C
    Subject
    hep-lat
    hep-lat
    hep-ex
    hep-ph
    nucl-ex
    nucl-th
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/4872
    
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    DOI
    10.1103/PhysRevLett.119.142002
    Abstract
    © 2017 American physical. We determine within lattice QCD the nucleon spin carried by valence and sea quarks and gluons. The calculation is performed using an ensemble of gauge configurations with two degenerate light quarks with mass fixed to approximately reproduce the physical pion mass. We find that the total angular momentum carried by the quarks in the nucleon is Ju+d+s=0.408(61)stat(48)syst and the gluon contribution is Jg=0.133(11)stat(14)syst, giving a total of JN=0.54(6)stat(5)syst that is consistent with the spin sum. For the quark intrinsic spin contribution, we obtain 12ΔΣu+d+s=0.201(17)stat(5)syst. All quantities are given in the modified minimal subtraction scheme at 2 GeV. The quark and gluon momentum fractions are also computed and add up to xu+d+s+xg=0.804(121)stat(95)syst+0.267(12)stat(10)syst=1.07(12)stat(10)syst, thus satisfying the momentum sum.
    Citation to related work
    American Physical Society (APS)
    Has part
    Physical Review Letters
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    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/4854
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