Direct Measurement of the Pseudoscalar Decay Constant fD+

Details Direct Measurement of the Pseudoscalar Decay Constant fD+ Direct Measurement of the Pseudoscalar Decay Constant fD+

2004-10-19

arxiv.org/abs/hep-ex/0410050v2

Phys.Lett.B610:183-191,2005

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 8 figures, Submitted to Physics Letters B in October, 2004

Scientific paper

10.1016/j.physletb.2005.01.098

The absolute branching fraction of $D^+ \to \mu^+ \nu$ has been directly measured by an analysis of a data sample of about 33 ${\rm pb^{-1}}$ collected around $\sqrt{s}=3.773$ GeV with the BES-II at the BEPC. At these energies, $D^-$ meson is produced in pair as $e^+e^-\to D^{+} D^{-}$. A total of $5321 \pm 149 \pm 160$ $D^-$ mesons are reconstructed from this data set. In the recoil side of the tagged $D^-$ mesons, $2.67\pm1.74$ purely leptonic decay events of $D^+ \to \mu^+ \nu$ are observed. This yields a branching fraction of $BF(D^+ \to \mu^+ \nu_{\mu}) = (0.122^{+0.111}_{-0.053}\pm 0.010)%$, and a corresponding pseudoscalar decay constant $f_{D^+}=(371^{+129}_{-119}\pm 25)$ MeV.

Affiliated with

Also associated with

No associations

Rating

Direct Measurement of the Pseudoscalar Decay Constant fD+ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Direct Measurement of the Pseudoscalar Decay Constant fD+, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct Measurement of the Pseudoscalar Decay Constant fD+ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-512688