Light quarks with twisted mass fermions
arXiv:hep-lat/0503031 · doi:10.1016/j.physletb.2005.05.051
Abstract
We investigate Wilson twisted mass fermions in the quenched approximation using different definitions of the critical bare quark mass m_c to realize maximal twist and, correspondingly, automatic O(a) improvement for physical observables. A particular definition of m_c is given by extrapolating the value of m_c obtained from the PCAC relation at non-vanishing bare twisted quark mass mu to mu=0. Employing this improved definition of the critical mass the Wilson twisted mass formulation provides the possibility to perform reliable simulations down to very small quark masses with correspondingly small pion masses of m_pi \simeq 250 MeV, while keeping the cutoff effects of O(a^2) under control.
10 pages, 8 figures, v2: version accepted for publication in PLB, minor corrections
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Cited by in corpus (29)
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- Dynamical Twisted Mass Fermions with Light Quarks: Simulation and Analysis Details
- Light Meson Physics from Maximally Twisted Mass Lattice QCD
- Dynamical Twisted Mass Fermions with Light Quarks
- Light baryon masses with dynamical twisted mass fermions
- Reducing cutoff effects in maximally twisted lattice QCD close to the chiral limit
- Computing K and D meson masses with N_f = 2+1+1 twisted mass lattice QCD
- Meson masses and decay constants from unquenched lattice QCD
- Numerical simulation of QCD with u, d, s and c quarks in the twisted-mass Wilson formulation
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- Flavour Breaking Effects of Wilson twisted mass fermions
- Lattice Spacing Dependence of the First Order Phase Transition for Dynamical Twisted Mass Fermions
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- First results with two light flavours of quarks with maximally twisted mass
- Determining the low energy parameters of Wilson Chiral Perturbation Theory
- flavours of twisted mass quarks: cut-off effects at tree-level of perturbation theory
- Lattice QCD at maximal twist
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- 3-point functions from twisted mass lattice QCD at small quark masses