Hyperons in Two Flavor Chiral Perturbation Theory - INSPIRE

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Hyperons in Two Flavor Chiral Perturbation Theory

Brian C. Tiburzi
(
- Maryland U.
)
,
Andre Walker-Loud
(
- Maryland U. and
- William-Mary Coll.
)

Aug, 2008

15 pages

Published in:

Phys.Lett.B 669 (2008) 246-253

e-Print:

0808.0482 [nucl-th]

DOI:

10.1016/j.physletb.2008.09.054

Report number:

UMD-40762-416

View in:

ADS Abstract Service

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Abstract: (arXiv)

We use two-flavor chiral perturbation theory to describe hyperons. We focus on the strangeness conserving sector, and, as an example, calculate hyperon masses. Convergence of this two-flavor chiral expansion for observables is improved over the three-flavor theory. The cost, however, is a larger number of low-energy constants that must be ultimately determined from lattice QCD data. A formula for the mass of the omega baryon is derived to sixth order in this expansion, and will aid lattice practitioners in scale setting or tuning the strange quark mass.

12.39.Fe
14.20.Jn
hyperon: mass
effective Lagrangian: chiral
symmetry: SU(2)
mass formula
Omega-: mass
symmetry: SU(3)
pi: mass
model: Gell-Mann-Okubo

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Figures(11)

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