BABAR Publications

Detailed Index as of March 28, 2024 16:48

PUB-09/019 Measurement of CP violation observables and parameters for the decays B+- -> DK*+-
Doc Type Journal Papers
Record Created May 18, 2009
SLAC-PUB
SLAC-PUB-13793  No citations
Preprint # 0909.3981 [hep-ex]
Accession Code DJ10727
Abstract
content_type = "text/plain"
user_agent   = "claudebot"
moz          = "claudebot"
moz_version  = ""

\\
Title: Measurement of $CP$ violation observables and parameters for the decays
$B^{\pm}\to D K^{*\pm}$.
Authors: The BABAR Collaboration, B. Aubert et al.
Comments: 15 pages,  13 postscript(eps) figures, submitted to PRD
Report-no: BABAR-PUB-09/019, SLAC-PUB-13793
\\
We study the decay $B^-\to DK^{*-}$ using a sample of 379$\times 10^6$ $\Upsilon(4S)\to B\bar{B}$ events collected 
with the BABAR detector at the PEP-II $B$-factory. We perform a ``GLW'' analysis where the $D$ meson decays 
into either a $CP$-even ($CP+$) eigenstate ($K^+K^-$, $\pi^+\pi^-$), $CP$-odd ($CP-$) eigenstate ($K^0_S\pi^0$, $K^0_S\phi$, 
$K^0_S\omega$) or a non-$CP$ state ($K^-\pi^+$). We also analyze $D$ meson decays into $K^+\pi^-$ from a Cabibbo-favored 
$\overline{D}^0$ decay or doubly suppressed $D^0$ decay (``ADS'' analysis). We measure observables 
that are sensitive to the CKM angle $\gamma$: the partial-rate charge asymmetries ${\cal A}_{CP\pm}$, 
the ratios   ${\cal R}_{CP\pm}$ of the $B$-decay branching fractions in $CP\pm$ and non-$CP$ decay, 
the ratio  ${\cal R}_{ADS}$ of the charge-averaged branching fractions, and the charge asymmetry 
 ${\cal A}_{ADS}$ of the ADS decays:
  ${\cal A}_{CP+}= 0.09 \pm 0.13 \pm 0.06$, 
  ${\cal A}_{CP-}= -0.23 \pm 0.21 \pm 0.07$, 
  ${\cal R}_{CP+} =2.17 \pm 0.35 \pm 0.09$,
  ${\cal R}_{CP-} = 1.03 \pm 0.27 \pm 0.13$,
  ${\cal R}_{ADS} =0.066 \pm 0.031 \pm 0.010$, and
  ${\cal A}_{ADS} = -0.34 \pm 0.43 \pm 0.16$,
where the first uncertainty is statistical and the second is systematic. 
Combining all the measurements and using a frequentist approach
yields the magnitude of the ratio between the Cabibbo-suppressed and favored amplitudes, 
$r_B$ = 0.31 with a one (two) sigma confidence
level interval
of [0.24, 0.38] ([0.17, 0.43]). The value $r_B=0$ is excluded at the 3.3 sigma level. 
A similar analysis
excludes values of $\gamma$ in the intervals
$[0,~7]^{\circ},~[55,~111]^{\circ}$, and $[175,~180]^{\circ}$ ([85, 99]$^{\circ}$) 
at the one (two) sigma confidence level.
\\

Revisions and Files 1 revised May 18, 2009
File Date
Thumbnails
File Name File Type File Format File Size (Kb) Comments
23-SEP-2009 babar-pub-09019.pdf Paper (journal paper or conference submission by BABAR Collaboration) pdf 397.30 pdf version of the paper
23-SEP-2009 babar-pub-09019.ps.gz Paper (journal paper or conference submission by BABAR Collaboration) ps.gz 1,163.88 compressed ps.gz file of the paper
23-SEP-2009 description.txt Abstract txt 2.01 abstract
23-SEP-2009 fig01a.eps Figure or plot eps 27.28 GLW KK neural net
23-SEP-2009 fig01b.eps Figure or plot eps 31.06 GLW pi pi neural net
23-SEP-2009 fig01c.eps Figure or plot eps 32.04 GLW Ks Pi0 neural net
23-SEP-2009 fig01d.eps Figure or plot eps 37.46 GLW Ks Phi neural net
23-SEP-2009 fig01e.eps Figure or plot eps 35.85 GLW Ks Omega neural net
23-SEP-2009 fig01f.eps Figure or plot eps 26.36 GLW K pi neural net
23-SEP-2009 fig02.eps Figure or plot eps 36.18 GLW mES distributions
23-SEP-2009 fig03.eps Figure or plot eps 12.91 ADS neural net
23-SEP-2009 fig04.eps Figure or plot eps 55.92 ADS wrong and right sign mES distributions
23-SEP-2009 fig05.eps Figure or plot eps 56.05 ADS wrong sign by charge mES
23-SEP-2009 fig06.eps Figure or plot eps 41.68 gamma vs rB
23-SEP-2009 fig07.eps Figure or plot eps 30.91 rB
23-SEP-2009 fig08.eps Figure or plot eps 25.58 gamma
Submitted ToPhysical Review D
Date SubmittedSeptember 23, 2009
Journal Year2009
Journal Volume80
Journal Article/Page Range092001
Categories
  • AWG: Breco