Publication: Finite volume effects in the chiral extrapolation of baryon masses
1
Issued Date
2014-09-10
Resource Type
ISSN
15502368
15507998
15507998
Other identifier(s)
2-s2.0-84907513442
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Physical Review D - Particles, Fields, Gravitation and Cosmology. Vol.90, No.5 (2014)
Suggested Citation
M. F.M. Lutz, R. Bavontaweepanya, C. Kobdaj, K. Schwarz Finite volume effects in the chiral extrapolation of baryon masses. Physical Review D - Particles, Fields, Gravitation and Cosmology. Vol.90, No.5 (2014). doi:10.1103/PhysRevD.90.054505 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/34924
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Finite volume effects in the chiral extrapolation of baryon masses
Author(s)
Abstract
© 2014 American Physical Society. We perform an analysis of the QCD lattice data on the baryon octet and decuplet masses based on the relativistic chiral Lagrangian. The baryon self-energies are computed in a finite volume at next-to-next-to-next-to-leading order (N3LO), where the dependence on the physical meson and baryon masses is kept. The number of free parameters is reduced significantly down to 12 by relying on large-Nc sum rules. Altogether we describe accurately more than 220 data points from six different lattice groups, BMW, PACS-CS, HSC, LHPC, QCDSF-UKQCD and NPLQCD. Values for all counterterms relevant at N3LO are predicted. In particular we extract a pion-nucleon sigma term of 39-1+2MeV and a strangeness sigma term of the nucleon of σsN=84-4+28MeV. The flavor SU(3) chiral limit of the baryon octet and decuplet masses is determined with (802±4) and (1103±6)MeV. Detailed predictions for the baryon masses as currently evaluated by the ETM lattice QCD group are made.