Measurement of the branching fractions for $D^{0}$ → $π^{-}$ $e^{+}$ $ν_{e}$ and $D^{0}$ → $K^{-}$ $e^{+}$ $ν_{e}$ and determination of ‖ $V_{cd}$ / $V_{cs}$ $‖^{2}$

Authors:

JAJ. Adler
J. Adler
JBJ. J. Becker
J. J. Becker
GBG. T. Blaylock
G. T. Blaylock
TBT. Bolton
T. Bolton
JBJ.-C. Brient
J.-C. Brient
TBT. Browder
T. Browder
JBJ. S. Brown
J. S. Brown
KBK. O. Bunnell
K. O. Bunnell
MBM. Burchell
M. Burchell
TBT. H. Burnett
T. H. Burnett
RCR. E. Cassell
R. E. Cassell
DCD. Coffman
D. Coffman

Publisher website

17 April 1989

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 62 (16) , 1821-1824
DOI:10.1103/physrevlett.62.1821
PMID:10039779

Abstract

Measurements of the exclusive branching fractions B(

D^{0}

→

π^{-}

e^{+}

ν_{e}

) and B(

D^{0}

→

K^{-}

e^{+}

ν_{e}

), using data collected at the ψ(3770) with the Mark III detector at the SLAC

e^{+}

e^{-}

storage ring SPEAR, are used to determine the ratio of the Kobayashi-Maskawa matrix elements ‖

V_{cd}

/

V_{cs}

‖^{2}

=0.057

\pm_{0.015}^{+ 0.038}

±0.005.

Keywords

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