Direct measurement of the pseudoscalar decay constant fD+

Study of the leptonic decays of pseudoscalarB,Dand vectorB*,D*mesons and of the semileptonicAlbertus1, Hernández2, Nieves3 et al. 2005Phys. Rev. D

“…They also compare very well with the experimental measurements of f D and f Ds in Refs. [47,48,49,50,51,53] being our f Ds /f D ratio in very good agreement with the value obtained using recent CLEO Collaboration data [47,48]. As for f B and f Bs , we find a very good agreement in the case of f Bs between our results and the ones obtained in the lattice or with the use of QSSR.…”

Precision measurements ofB(D+→μ+νμAblikim1, Ачасов2, Ai3 et al. 2014Phys. Rev. DSelf Cite514230View full textAdd to dashboardCite

“…This measured branching fraction is consistent within errors with those measured at BES-I [12], BES-II [13], and CLEO-c [10], but with the best precision. The systematic uncertainty in the D þ → μ þ ν μ branching fraction determination includes seven contributions: (1) the uncertainty in the number of D − tags (0.5%), which contain the uncertainty in the fit to the M BC distribution (0.5%) and the difference in the fake π 0 rates between the data and the Monte Carlo events (0.1%); (2) the uncertainty in μ tracking/identification (0.1%=0.8%) determined by comparing the μ tracking/identification efficiencies for data and Monte Carlo events, where the μ AE samples are from the copious e þ e − → γμ þ μ − process; (3) the uncertainty in the E γ max selection requirement (0.1%) determined by comparing doubly tagged DD hadronic decay events in the data and Monte Carlo; (4) the uncertainty associated with the choice of the M 2 miss signal window (0.5%) determined from changes in the measured branching fractions using different 2 (color online).…”

Experimental overview on $D_{(s)}$ purely leptonic decays

“…Experimental studies of D + → + ν have mainly come from e + e − experiments near D + D − production threshold, which are MARKIII [5], BESI [6], BESII [7], CLEO-c [8,9,10] and BE-SIII [11]. These experiments used the datasets taken around 3.773 GeV, except for the BESI experiment at 4.03 GeV.…”