$B$, $B_s$, $K$ and $\pi$ weak matrix elements with physical light quarks

Autor:	C. T. H. Davies, C. McNeile, G. P. Lepage, R. R. Horgan, Christopher Monahan, J. Shigemitsu, R.J. Dowdall
Rok vydání:	2014
Předmět:	Pseudoscalar Quark Physics Particle physics Valence (chemistry) Meson High Energy Physics::Lattice Lattice (order) High Energy Physics::Phenomenology Extrapolation Pi High Energy Physics::Experiment Atomic physics
Zdroj:	Proceedings of 31st International Symposium on Lattice Field Theory LATTICE 2013 — PoS(LATTICE 2013).
DOI:	10.22323/1.187.0406
Popis:	Calculations of pseudoscalar decay constants of B, Bs, K and p mesons with physical light quarks are presented. We use HISQ ensembles that include u;d;s and c sea quarks at three lattice spacings. HISQ is used for the valence light quarks and a radiatively improved NRQCD action for the heavy quarks. The key results are fB+ = 0:184(4) GeV, fBs = 0:224(4) GeV, fBs=fB+ = 1:217(8), f K+=f p+ = 1:1916(21), f K+ = 155:37(34) MeV, giving a significant improvement over previous results that required chiral extrapolation. We also calculate the Wilson flow scale w0, finding w0 = 0:1715(9) fm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4adb3a338df2495290250a890490d5c8 https://doi.org/10.22323/1.187.0406 Zobrazit plný text záznamu