Pseudoscalar decay constants $f_K/f_\pi$, $f_D$ and $f_{D_s}$ with $N_f = 2 + 1 + 1$ ETMC configurations
| Autor: | Dimopoulos, P., Frezzotti, R., Lami, P., Lubicz, V., Picca, E., Riggio, L., Rossi, G. C., Sanfilippo, F., Simula, S., Tarantino, C. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | PoS LATTICE 2013 (2013) 314 |
| Druh dokumentu: | Working Paper |
| Popis: | We present a lattice QCD calculation of the pseudoscalar decay constants $f_K$, $f_D$ and $f_{D_s}$ performed by the European Twisted Mass Collaboration with $N_f = 2 + 1 + 1$ 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 $210$MeV. Our main results are: $f_{K^+}/f_{\pi^+}=1.183(17)$, $f_{K^+}=154.4(2.1)$MeV, $f_{D_s}=242.1(8.3)$MeV, $f_D=201.9(8.0)$MeV, $f_{D_s}/f_D=1.199(25)$ and $(f_{D_s}/f_D) / (f_K/f_\pi) = 1.005(15)$. Comment: 7 pages, 5 figures, presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), 29 July - 3 August 2013, Mainz, Germany |
| Databáze: | arXiv |
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