Journal Article

FZJ-2016-02463

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Lattice Computation of the Nucleon Scalar Quark Contents at the Physical Point

Durr, S.FZJ* ; Fodor, Z. ; Hoelbling, C. ; Katz, S.  D. ; Krieg, S.FZJ* ; Lellouch, L. ; Lippert, T.FZJ* ; Metivet, T. ; Portelli, A. ; Szabo, K.FZJ* ; Torrero, C. ; Toth, B.  C. ; Varnhorst, L.

2016
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/10593  doi:10.1103/PhysRevLett.116.172001

Abstract: We present a QCD calculation of the u, d, and s scalar quark contents of nucleons based on 47 lattice ensembles with Nf=2+1 dynamical sea quarks, 5 lattice spacings down to 0.054 fm, lattice sizes up to 6 fm, and pion masses down to 120 MeV. Using the Feynman-Hellmann theorem, we obtain fNud=0.0405(40)(35) and fNs=0.113(45)(40), which translates into σπN=38(3)(3)  MeV, σsN=105(41)(37)  MeV, and yN=0.20(8)(8) for the sigma terms and the related ratio, where the first errors are statistical and the second errors are systematic. Using isospin relations, we also compute the individual up and down quark contents of the proton and neutron (results in the main text).

Note: arXiv:1510.08013

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)
2. John von Neumann - Institut für Computing (NIC)

Research Program(s):

1. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)
2. Up and down quark masses from lattice QCD + QED (hjs00_20151101) (hjs00_20151101)

Appears in the scientific report 2016

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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