Comparison between overlap and twisted mass fermions towards the chiral limit

W. Bietenholz; S. Capitani; T. Chiarappa; M. Hasenbusch; K. Jansen; K. -I. Nagai; M. Papinutto; L. Scorzato; S. Shcheredin; A. Shindler; C. Urbach; U. Wenger; I. Wetzorke

doi:10.1016/j.nuclphysbps.2004.11.370

Comparison between overlap and twisted mass fermions towards the chiral limit

High Energy Physics - Lattice 2008-11-26 v1

Authors: W. Bietenholz , S. Capitani , T. Chiarappa , M. Hasenbusch , K. Jansen , K. -I. Nagai , M. Papinutto , L. Scorzato , S. Shcheredin , A. Shindler , C. Urbach , U. Wenger , I. Wetzorke

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Abstract

We compare overlap fermions, which are chirally invariant, and Wilson twisted mass fermions in the approach to the chiral limit. Our quenched simulations reveal that with both formulations of lattice fermions pion masses of O(250 MeV) can be reached in practical simulations. Our comparison is done at a fixed lattice spacing a=0.123 fm. Several quantities are measured, such as hadron masses and pseudoscalar decay constants.

Keywords

overlap fermions twisted mass fermions chiral limit pion mass quenched simulations hadron masses decay constants

Cite

@article{arxiv.hep-lat/0409109,
  title  = {Comparison between overlap and twisted mass fermions towards the chiral limit},
  author = {W. Bietenholz and S. Capitani and T. Chiarappa and M. Hasenbusch and K. Jansen and K. -I. Nagai and M. Papinutto and L. Scorzato and S. Shcheredin and A. Shindler and C. Urbach and U. Wenger and I. Wetzorke},
  journal= {arXiv preprint arXiv:hep-lat/0409109},
  year   = {2008}
}

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Lattice2004(chiral)

Comparison between overlap and twisted mass fermions towards the chiral limit

Abstract

Keywords

Cite

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