SEMILEPTONIC FORM FACTORS

$\mathit r_{\mathit v}{}\equiv\mathit V(0)/\mathit A_{1}$(0) in ${{\mathit D}^{+}}$ $\rightarrow$ ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$

INSPIRE   JSON  (beta) PDGID:
S031FRV
See also BRIERE 2010 for ${{\overline{\mathit K}}^{*}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$ helicity-basis form-factor measurements.
VALUE EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1.48 \pm0.05}$ OUR AVERAGE  Error includes scale factor of 1.9.  See the ideogram below.
$1.43$ $\pm0.07$ $\pm0.03$ 3.8k 1
ABLIKIM
2024CS
 BES3 ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$
$1.411$ $\pm0.058$ $\pm0.007$ 16.2k
ABLIKIM
2016F
 BES3 ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$
$1.463$ $\pm0.017$ $\pm0.031$ 2
DEL-AMO-SANCH..
2011I
 BABR
$1.504$ $\pm0.057$ $\pm0.039$ 15k 3
LINK
2002L
 FOCS ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$
$1.45$ $\pm0.23$ $\pm0.07$ 763
ADAMOVICH
1999
BEAT ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$
$1.90$ $\pm0.11$ $\pm0.09$ 3000 4
AITALA
1998B
 E791 ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$
$1.84$ $\pm0.11$ $\pm0.09$ 3034
AITALA
1998F
 E791 ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$
$1.74$ $\pm0.27$ $\pm0.28$ 874
FRABETTI
1993E
 E687 ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$
$2.00$ ${}^{+0.34}_{-0.32}$ $\pm0.16$ 305
KODAMA
1992
E653 ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$2.0$ $\pm0.6$ $\pm0.3$ 183
ANJOS
1990E
 E691 ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$
1  ABLIKIM 2024CS uses a single-pole dominance parameterization.
2  DEL-AMO-SANCHEZ 2011I finds the pole mass ${\mathit m}_{{{\mathit A}}}$ = ($2.63$ $\pm0.10$ $\pm0.13$) GeV (${\mathit m}_{{{\mathit V}}}$ is fixed at 2 GeV).
3  LINK 2002L includes the effects of interference with an $\mathit S$-wave background. This much improves the goodness of fit, but does not much shift the values of the form factors.
4  This is slightly different from the AITALA 1998B value: see ref.$~$[5] in AITALA 1998F.

           $\mathit r_{\mathit v}{}\equiv\mathit V(0)/\mathit A_{1}$(0) in ${{\mathit D}^{+}}$ $\rightarrow$ ${{\overline{\mathit K}}^{*}{(892)}^{0}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}$
References