We present a lattice QCD calculation of the pseudoscalar decay constants fK, fD and fDs performed by the European Twisted Mass Collaboration with Nf=2+1+1 dynamical fermions. We simulated at three different values of the lattice spacing, the smallest being approximately 0.06fm, and with pion masses as small as 210MeV. Our main results are: fK+/fπ+=1.183(17), fK+=154.4(2.1)MeV, fDs=242.1(8.3)MeV, fD=201.9(8.0)MeV, fDs/fD=1.199(25) and (fDs/fD)/(fK/fπ)=1.005(15).

Dimopoulos, P., Frezzotti, R., Lami, P., Lubicz, V., Picca, E., Riggio, L., et al. (2014). Pseudoscalar decay constants fK/fπ, fD and fDs with Nf=2+1+1 ETMC configurations. In Proceeding of the 31st International Symposium on Lattice Field Theory (pp.314).

Pseudoscalar decay constants fK/fπ, fD and fDs with Nf=2+1+1 ETMC configurations

LUBICZ, Vittorio;TARANTINO, CECILIA
2014-01-01

Abstract

We present a lattice QCD calculation of the pseudoscalar decay constants fK, fD and fDs performed by the European Twisted Mass Collaboration with Nf=2+1+1 dynamical fermions. We simulated at three different values of the lattice spacing, the smallest being approximately 0.06fm, and with pion masses as small as 210MeV. Our main results are: fK+/fπ+=1.183(17), fK+=154.4(2.1)MeV, fDs=242.1(8.3)MeV, fD=201.9(8.0)MeV, fDs/fD=1.199(25) and (fDs/fD)/(fK/fπ)=1.005(15).
2014
Dimopoulos, P., Frezzotti, R., Lami, P., Lubicz, V., Picca, E., Riggio, L., et al. (2014). Pseudoscalar decay constants fK/fπ, fD and fDs with Nf=2+1+1 ETMC configurations. In Proceeding of the 31st International Symposium on Lattice Field Theory (pp.314).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/160965
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