${{\mathit D}_{{{s}}}^{+}}$ Semileptonic Form Factors and Decay Constants

$\mathit r_{\mathit v}{}\equiv\mathit V(0)/\mathit A_{1}$(0) in ${{\mathit D}_{{{s}}}^{+}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$

INSPIRE   JSON  (beta) PDGID:
S034FRV
VALUE EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1.76 \pm0.07}$ OUR AVERAGE  Error includes scale factor of 1.1.
$1.58$ $\pm0.17$ $\pm0.02$ 1
ABLIKIM
2023BZ
 BES3 ${{\mathit D}_{{{s}}}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$
$1.807$ $\pm0.046$ $\pm0.065$ 25k 2
AUBERT
2008AN
 BABR ${{\mathit \phi}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$
$1.549$ $\pm0.250$ $\pm0.148$ 793
LINK
2004C
 FOCS ${{\mathit \phi}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$
$2.27$ $\pm0.35$ $\pm0.22$ 271
AITALA
1999D
 E791 ${{\mathit \phi}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$, ${{\mathit \phi}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$
$0.9$ $\pm0.6$ $\pm0.3$ 308
AVERY
1994B
 CLE2 ${{\mathit \phi}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$
$1.8$ $\pm0.9$ $\pm0.2$ 90
FRABETTI
1994F
 E687 ${{\mathit \phi}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$
$2.3$ ${}^{+1.1}_{-0.9}$ $\pm0.4$ 19
KODAMA
1993
E653 ${{\mathit \phi}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$
1  Partial wave analysis of 939 ${{\mathit D}_{{{s}}}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$ events.
2  To compare with previous measurements, this AUBERT 2008AN value is from a fit that fixes the pole masses at ${\mathit m}_{{{\mathit A}}}$ = 2.5 GeV/c${}^{2}$ and ${\mathit m}_{{{\mathit V}}}$ = 2.1 GeV/c${}^{2}$. A simultaneous fit to $\mathit r_{2}$, $\mathit r_{{\mathrm {v}}}$, $\mathit r_{0}$ (a significant $\mathit s$-wave contribution) and ${\mathit m}_{{{\mathit A}}}$, gives $\mathit r_{{\mathrm {v}}}$ = $1.849$ $\pm0.060$ $\pm0.095$.
References