Spectrum of quenched twisted mass lattice QCD at maximal twist

Mar, 2005
22 pages
Published in:
  • Phys.Rev.D 71 (2005) 094505
e-Print:

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Abstract:
Hadron masses are computed from quenched twisted mass lattice QCD for a degenerate doublet of up and down quarks with the twist angle set to pi/2, since this maximally twisted theory is expected to be free of linear discretization errors. Two separate definitions of the twist angle are used, and the hadron masses for these two cases are compared. The flavor breaking, that can arise due to twisting, is discussed in the context of mass splittings within the Delta(1232) multiplet.
  • 12.38.Gc
  • gauge field theory: SU(3)
  • fermion: lattice field theory
  • mass: twist
  • approximation: quenching
  • hadron: mass spectrum
  • flavor: symmetry breaking
  • Delta(1232): multiplet
  • parity: conservation law
  • numerical calculations: Monte Carlo