TY - JOUR
T1 - B, Bs, K and pi weak matrix elements with physical light quarks
AU - Dowdall, RJ
AU - Davies, CTH
AU - Horgan, RR
AU - Lepage, GP
AU - McNeile, C
AU - Monahan, CJ
AU - Shigemitsu, J
PY - 2013/9/18
Y1 - 2013/9/18
N2 - Calculations of pseudoscalar decay constants of B, Bs, K and pi 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 f_{B^+}=0.184(4)$ GeV, f_{B_s}=0.224(4) GeV,
f_{B_s}/f_{B^+}=1.217(8), f_{K^+}/f_{pi^+}=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 w_0, finding
w_0=0.1715(9) fm.
AB - Calculations of pseudoscalar decay constants of B, Bs, K and pi 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 f_{B^+}=0.184(4)$ GeV, f_{B_s}=0.224(4) GeV,
f_{B_s}/f_{B^+}=1.217(8), f_{K^+}/f_{pi^+}=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 w_0, finding
w_0=0.1715(9) fm.
KW - hep-lat
UR - https://pearl.plymouth.ac.uk/context/secam-research/article/1057/viewcontent/1309.4610v1.pdf
M3 - Article
VL - 0
JO - Default journal
JF - Default journal
IS - 0
ER -