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CONF-06/017 Measurement of cos(2beta) in B0 -> D(*)0 h0 decays with a time-dependent Dalitz plot analysis of D0 -> K0S pi+ pi-
Doc Type Conference Submissions
Record Created July 5, 2006
SLAC-PUB
SLAC-PUB-11991  No citations
Preprint # hep-ex/0607105
Abstract
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We report a preliminary measurement of $\cos2\beta$ in
$B^0\rightarrow D^{(*)0}h^0$ decays with a time-dependent Dalitz plot
analysis of $D^0\rightarrow K_S\pi^+\pi^-$, where $h^0$ is a light
neutral meson such as $\pi^0$, $\eta$, $\eta'$ or $\omega$. The strong
phase variation on the Dalitz plot allows the access to the angle
$\beta$ with only a two-fold ambiguity ($\beta+\pi$). Using $311\times
10^{6}$ $B\overline{B}$ pairs collected at the Babar detector, we obtain 
$\cos2\beta = 0.54 \pm 0.54 \pm 0.08 \pm 0.18$,
$\sin2\beta = 0.45 \pm 0.36 \pm 0.05 \pm 0.07$, and
$|\lambda| = 0.975^{+0.093}_{-0.085} \pm 0.012 \pm 0.002 $,
where the first errors are statistical, the second are experimental
systematic uncertainties, and the third are the signal Dalitz model
uncertainties. This measurement favors the solution of $\beta=
22^\circ$ over $68^\circ$  at an $87\%$ confidence level.

Revisions and Files 1 revised July 5, 2006
File Date
Thumbnails
File Name File Type File Format File Size (Kb) Comments
27-JUL-2006 abstract.txt Abstract txt 0.87
27-JUL-2006 babar conf 06017.pdf Paper (journal paper or conference submission by BABAR Collaboration) pdf 442.76
27-JUL-2006 babar conf 06017.ps.gz Paper (journal paper or conference submission by BABAR Collaboration) ps.gz 142.35
27-JUL-2006 fig01a.eps Figure or plot eps 23.62 diagram
27-JUL-2006 fig01b.eps Figure or plot eps 23.62 diagram
27-JUL-2006 fig02.eps Figure or plot eps 46.44 mES distributions
27-JUL-2006 fig03.eps Figure or plot eps 51.10 mD0 distributions
27-JUL-2006 fig04.eps Figure or plot eps 39.92 2-D Dalitz distribution
27-JUL-2006 fig05.eps Figure or plot eps 78.36 Dalitz projections
27-JUL-2006 fig06.eps Figure or plot eps 12.98 Asymmetry
27-JUL-2006 fig07.eps Figure or plot eps 28.99 Confidence level
Submitted To2006 International Conference on High Energy Physics (ICHEP'06)
Date SubmittedJuly 29, 2006
Categories
  • AWG: TDBC