This title appears in the Scientific Report :
2012
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevLett.108.222001 in citations.
Please use the identifier: http://hdl.handle.net/2128/7379 in citations.
Strangeness Contribution to the Proton Spin from Lattice QCD
Strangeness Contribution to the Proton Spin from Lattice QCD
We compute the strangeness and light-quark contributions Delta s, Delta u, and Delta d to the proton spin in n(f) = 2 lattice QCD at a pion mass of about 285 MeV and at a lattice spacing a approximate to 0.073 fm, using the nonperturbatively improved Sheikholeslami-Wohlert Wilson action. We carry ou...
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Personal Name(s): | Bali, G.S. |
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Collins, S. / Göckeler, M. / Horsley, R. / Nakamura, Y. / Nobile, A. / Pleiter, D. / Rakow, P.E.L. / Schäfer, A. / Schierholz, G. / Zanotti, J.M. | |
Contributing Institute: |
Jülich Supercomputing Center; JSC |
Published in: | Physical review letters, 108 (2012) S. 222001 |
Imprint: |
College Park, Md.
APS
2012
|
Physical Description: |
222001 |
DOI: |
10.1103/PhysRevLett.108.222001 |
PubMed ID: |
23003587 |
Document Type: |
Journal Article |
Research Program: |
Strong Interaction Supercomputing Training Network Computational Science and Mathematical Methods Scientific Computing |
Series Title: |
Physical Review Letters
108 |
Subject (ZB): | |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/7379 in citations.
We compute the strangeness and light-quark contributions Delta s, Delta u, and Delta d to the proton spin in n(f) = 2 lattice QCD at a pion mass of about 285 MeV and at a lattice spacing a approximate to 0.073 fm, using the nonperturbatively improved Sheikholeslami-Wohlert Wilson action. We carry out the renormalization of these matrix elements, which involves mixing between contributions from different quark flavors. Our main result is the small negative value Delta s((MS) over bar)(root 7.4 GeV) = -0.020(10)(4) of the strangeness contribution to the nucleon spin. The second error is an estimate of the uncertainty, due to the missing extrapolation to the physical point. |