6533b830fe1ef96bd1297aae

RESEARCH PRODUCT

Dynamical twisted mass fermions with light quarks

Ph. BoucaudP. DimopoulosF. FarchioniR. FrezzottiV. GimenezG. HerdoizaK. JansenV. LubiczG. MartinelliC. McneileC. MichaelI. MontvayD. PalaoM. PapinuttoJ. PickavanceG. C. RossiL. ScorzatoA. ShindlerS. SimulaC. UrbachU. WengerEtm Collaboration

subject

QuarkNuclear and High Energy PhysicsParticle physicsChiral perturbation theoryMONTE-CARLO ALGORITHMCHIRAL PERTURBATION-THEORY; MONTE-CARLO ALGORITHM; GROSS-NEVEU MODEL; YANG-MILLS THEORY; LATTICE QCD; PHASE-STRUCTURE; WILSON QUARKS; HMC ALGORITHM; GAUGE ACTIONS; 2 FLAVORSHigh Energy Physics::LatticeLattice field theoryScalar (mathematics)FOS: Physical sciences2 FLAVORSGAUGE ACTIONS01 natural sciences7. Clean energyCHIRAL PERTURBATION-THEORYLATTICE QCDHigh Energy Physics - LatticeGross–Neveu modelWILSON QUARKS0103 physical sciencesddc:530Twist010306 general physicsPhysics010308 nuclear & particles physics[PHYS.HLAT]Physics [physics]/High Energy Physics - Lattice [hep-lat]High Energy Physics - Lattice (hep-lat)High Energy Physics::PhenomenologyFísicaGROSS-NEVEU MODELFermionLattice QCDSettore FIS/02 - Fisica Teorica Modelli e Metodi MatematiciYANG-MILLS THEORYPHASE-STRUCTUREHMC ALGORITHM

description

We present results of dynamical simulations with 2 flavours of degenerate Wilson twisted mass quarks at maximal twist in the range of pseudo scalar masses from 300 to 550 MeV. The simulations are performed at one value of the lattice spacing a \lesssim 0.1 fm. In order to have O(a) improvement and aiming at small residual cutoff effects, the theory is tuned to maximal twist by requiring the vanishing of the untwisted quark mass. Precise results for the pseudo scalar decay constant and the pseudo scalar mass are confronted with chiral perturbation theory predictions and the low energy constants F, \bar{l}_3 and \bar{l}_4 are evaluated with small statistical errors.

yearjournalcountryeditionlanguage
2007-01-15
10.1016/j.physletb.2007.04.054http://hdl.handle.net/20.500.11767/32909