Nucleon Spin and Momentum Decomposition Using Lattice QCD Simulations
Genre
Pre-printDate
2017-10-06Author
Alexandrou, CConstantinou, M
Hadjiyiannakou, K
Jansen, K
Kallidonis, C
Koutsou, G
Avilés-Casco, AV
Wiese, C
Permanent link to this record
http://hdl.handle.net/20.500.12613/4872
Metadata
Show full item recordDOI
10.1103/PhysRevLett.119.142002Abstract
© 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 LettersADA compliance
For Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.eduae974a485f413a2113503eed53cd6c53
http://dx.doi.org/10.34944/dspace/4854