Baryon Masses in Lattice QCD with Exact Chiral Symmetry

Details Baryon Masses in Lattice QCD with Exact Chiral Symmetry Baryon Masses in Lattice QCD with Exact Chiral Symmetry

2005-01-24

arxiv.org/abs/hep-lat/0501021v1

Nucl.Phys.A755:471-474,2005

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages, 2 EPS figures, to appear in the Proceedings of Baryons 2004, Palaiseau, France, October 25-29, 2004

Scientific paper

10.1016/j.nuclphysa.2005.03.090

We investigate the baryon mass spectrum in quenched lattice QCD with exact chiral symmetry. For 100 gauge configurations generated with Wilson gauge action at $ \beta = 6.1 $ on the $ 20^3 \times 40 $ lattice, we compute (point-to-point) quark propagators for 30 quark masses in the range $ 67 {MeV} \le m_q \le 1790 {MeV} $. For baryons only composed of strange and charm quarks, their masses are extracted directly from the time correlation functions, while for those containing $ u (d) $ light quarks, their masses are obtained by chiral extrapolation to $ m_\pi = 135 $ MeV. Our results of baryon masses are in good agreement with experimental values, except for the negative parity states of $ \Lambda $ and $ \Lambda_c $. Further, our results of charmed (including doubly-charmed and triply-charmed) baryons can serve as predictions of QCD.

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