Hauptseite > Publikationsdatenbank > Sigma term and strangeness content of octet baryons > print

001     18058
005     20210129210709.0
024 7 _ |a 10.1103/PhysRevD.85.014509
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082 _ _ |a 530
084 _ _ |2 WoS
|a Astronomy & Astrophysics
084 _ _ |2 WoS
|a Physics, Particles & Fields
100 1 _ |0 P:(DE-Juel1)132580
|a Dürr, S.
|b 0
|u FZJ
245 _ _ |a Sigma term and strangeness content of octet baryons
260 _ _ |a [S.l.]
|b Soc.
|c 2012
264 _ 1 |3 online
|2 Crossref
|b American Physical Society (APS)
|c 2012-01-26
264 _ 1 |3 print
|2 Crossref
|b American Physical Society (APS)
|c 2012-01-01
300 _ _ |a 014509
336 7 _ |a Journal Article
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440 _ 0 |0 4923
|a Physical Review D
|v 85
|x 1550-7998
|y 1
500 _ _ |a Computations were performed using HPC resources from F.Z. Julich and from GENCI-[IDRIS/ CCRT] (Grant No. 52275) and clusters at Wuppertal and CPT. This work is supported in part by EU Grants No. I3HP, FP7/2007-2013/ERC, No. 208740, No. MRTN-CT-2006-035482 (FLAVIAnet), DFG Grants No. FO 502/2, SFB-TR 55, by CNRS Grant GDR No. 2921, and PICS No. 4707. The authors also thank Martin Jung for pointing out an error in the normalization of the dimensionless sigma terms.
520 _ _ |a By using lattice QCD computations we determine the sigma terms and strangeness content of all octet baryons by means of an application of the Hellmann-Feynman theorem. In addition to polynomial and rational expressions for the quark-mass dependence of octet members, we use SU(3) covariant baryon chiral perturbation theory to perform the extrapolation to the physical up and down quark masses. Our Nf = 2 + 1 lattice ensembles include pion masses down to about 190 MeV in large volumes (M pi L greater than or similar to 4), and three values of the lattice spacing. Our main results are the nucleon sigma term sigma(pi N) = 39(4)((+18)(-7)) and the strangeness content y(N) = 0.20(7)((+13)(-17)). Under the assumption of validity of covariant baryon chi PT in our range of masses one finds y(N) = 0.276(77)((+90)(-62)).
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700 1 _ |0 P:(DE-HGF)0
|a Hoelbling, C.
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700 1 _ |0 P:(DE-HGF)0
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700 1 _ |0 P:(DE-HGF)0
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700 1 _ |0 P:(DE-Juel1)132171
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|a Szabó, K.K.
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773 1 8 |a 10.1103/physrevd.85.014509
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773 _ _ |a 10.1103/PhysRevD.85.014509
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