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. (2013). Pseudoscalar decay constants fK/fπ, fD and fDs with Nf=2+1+1 ETMC configurations. ??????? it.cilea.surplus.oa.citation.tipologie.CitationProceedings.prensentedAt ??????? 31st International Symposium on Lattice Field Theory (Lattice 2013), Mainz, Germany.
Pseudoscalar decay constants fK/fπ, fD and fDs with Nf=2+1+1 ETMC configurations
FREZZOTTI, ROBERTO;ROSSI, GIANCARLO;
2013-01-01
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).| File | Dimensione | Formato | |
|---|---|---|---|
|
1311.3080v1.pdf
accesso aperto
Descrizione: pdf
Dimensione
218.53 kB
Formato
Adobe PDF
|
218.53 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
