Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-08-24
Phys.Rev.D82:091103,2010
Physics
High Energy Physics
High Energy Physics - Experiment
8 pages, 3 postscript figures
Scientific paper
10.1103/PhysRevD.82.091103
The absolute branching fractions for the decays $D^-_s\!\rightarrow\!\ell^-\bar{\nu}_{\ell}$ ($\ell=e$, $\mu$, or $\tau$) are measured using a data sample corresponding to an integrated luminosity of 521 fb$^{-1}$ collected at center of mass energies near 10.58 GeV with the \mbox{\slshape B\kern-0.1em{\smaller A}\kern-0.1em B\kern-0.1em{\smaller A\kern-0.2em R}} detector at the PEP-II $e^+e^-$ collider at SLAC. The number of $D^-_s$ mesons is determined by reconstructing the recoiling system $DKX\gamma$ in events of the type $e^+e^-{\rightarrow}DKXD^{*-}_s$, where $D^{*-}_s\rightarrow D^-_s\gamma$ and $X$ represents additional pions from fragmentation. The $D^-_s\!\rightarrow\!\ell^-\bar{\nu}_{\ell}$ events are detected by full or partial reconstruction of the recoiling system $DKX\gamma\ell$. The branching fraction measurements are combined to determine the $D^-_s$ decay constant $f_{D_s} = (258.6 \pm 6.4 \pm 7.5)$ MeV, where the first uncertainty is statistical and the second is systematic.
"The BABAR Collaboration
Amo Sanches del P.
No associations
LandOfFree
Measurement of the Absolute Branching Fractions for $D^-_s\!\rightarrow\!\ell^-\barν_{\ell}$ and Extraction of the Decay Constant $f_{D_s}$ 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 Measurement of the Absolute Branching Fractions for $D^-_s\!\rightarrow\!\ell^-\barν_{\ell}$ and Extraction of the Decay Constant $f_{D_s}$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the Absolute Branching Fractions for $D^-_s\!\rightarrow\!\ell^-\barν_{\ell}$ and Extraction of the Decay Constant $f_{D_s}$ will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-394150