6533b7dafe1ef96bd126d9ac

RESEARCH PRODUCT

Light hadrons from lattice QCD with light (u, d), strange and charm dynamical quarks

R. BaronP. BoucaudJ. CarbonellA. DeuzemanV. DrachF. FarchioniV. GimenezG. HerdoizaK. JansenC. McneileC. MichaelI. MontvayD. PalaoE. PallanteO. PeneS. RekerC. UrbachM. WagnerU. WengerEtm Collaboration

subject

QuarkNuclear and High Energy PhysicsParticle physicsChiral perturbation theoryHigh Energy Physics::LatticeHadronCharm quarkFOS: Physical sciencesLattice QCD2 FLAVORS01 natural sciencesCHIRAL PERTURBATION-THEORYCharm quarkLattice constantHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics - LatticeTWISTED MASS FERMIONSChiral perturbation theoryWILSON QUARKS0103 physical sciencesddc:530ALGORITHM010306 general physicsSCALEPhysics010308 nuclear & particles physics[PHYS.HLAT]Physics [physics]/High Energy Physics - Lattice [hep-lat]High Energy Physics - Lattice (hep-lat)High Energy Physics::PhenomenologyFísicaFermionLattice QCDSIMULATIONSPseudoscalarHigh Energy Physics - PhenomenologyLattice gauge theoryChiral LagrangiansYANG-MILLS THEORYHigh Energy Physics::ExperimentPHASE-STRUCTUREMESONChiral lagrangiansLight hadrons

description

We present results of lattice QCD simulations with mass-degenerate up and down and mass-split strange and charm (N_f = 2+1+1) dynamical quarks using Wilson twisted mass fermions at maximal twist. The tuning of the strange and charm quark masses is performed at two values of the lattice spacing a~0.078 fm and a~0.086 fm with lattice sizes ranging from L~1.9 fm to L~2.8 fm. We measure with high statistical precision the light pseudoscalar mass m_PS and decay constant f_PS in a range 270 < m_PS < 510 MeV and determine the low energy parameters f_0, l_3 and l_4 of SU(2) chiral perturbation theory. We use the two values of the lattice spacing, several lattice sizes as well as different values of the light, strange and charm quark masses to explore the systematic effects. A first study of discretisation effects in light-quark observables and a comparison to N_f=2 results are performed.

yearjournalcountryeditionlanguage
2010-06-01Journal of High Energy Physics
10.1007/jhep06(2010)111https://doi.org/10.1007/jhep06(2010)111