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Baryon Masses in Lattice QCD with Exact Chiral Symmetry

Ting-Wai Chiu·Tung-Han Hsieh
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Abstract

We investigate the baryon mass spectrum in quenched lattice QCD with exact chiral symmetry. For 100 gauge configurations generated with Wilson gauge action at $ β= 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_π= 135 $ MeV. Our results of baryon masses are in good agreement with experimental values, except for the negative parity states of $ Λ$ and $ Λ_c $. Further, our results of charmed (including doubly-charmed and triply-charmed) baryons can serve as predictions of QCD.

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Ting-Wai Chiu, Tung-Han Hsieh. 2005-01-24. Baryon Masses in Lattice QCD with Exact Chiral Symmetry. https://doi.org/10.1016/j.nuclphysa.2005.03.090

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