Neutral mesons and disconnected diagrams in Twisted Mass QCD

Abstract

We evaluate properties of neutral mesons in Nf=2 dynamical simulations of TMQCD at maximal twist. The pion is explored - establishing the size of the isospin splitting (an order a^2 effect). We investigate the eta' (the Nf=2 flavour singlet pseudoscalar meson) and neutral rho and scalar mesons. We show that disconnected diagrams can be evaluated very efficiently in TMQCD using variance reduction methods.

7 pages, presented at Lattice 2007, Regensburg, Germany

References in corpus (4)

• Decay width of light quark hybrid meson from the lattice
• Dynamical Twisted Mass Fermions with Light Quarks
• Quark mass dependence of hadron masses from lattice QCD
• Flavour Breaking Effects of Wilson twisted mass fermions

Cited by in corpus (9)

• Electromagnetic form factor of the pion from twisted-mass lattice QCD at Nf=2
• Lattice QCD with two light Wilson quarks and maximally twisted mass
• eta' meson From Two Flavor Dynamical Domain Wall Fermions
• Determination of Low-Energy Constants of Wilson Chiral Perturbation Theory
• The omega-rho meson mass splitting and mixing from lattice QCD
• Hard hadron spectroscopy
• Simulations of light scalar mesons on the lattice and related difficulties
• Results on the disconnected contributions for hadron structure
• The Effect of the Low Energy Constants on the Spectral Properties of the Wilson Dirac Operator