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CONF-04/002 Observation of B meson decay to a1(1260) pi
Doc Type Conference Submissions
Record Created June 30, 2004
SLAC-PUB
SLAC-PUB-10597  No citations
Preprint # hep-ex/0408021
Abstract
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We present a preliminary  measurement of the branching fraction of the $B$ meson decay \\
$B^0 \rightarrow a_1^+(1260) \pi^-$   with  $a_1^+(1260) \rightarrow \pi^+ \pi^+ \pi^-$.
 The data were recorded with the BaBaR  detector
at the SLAC $B$ factory PEP-II  and correspond to
$124\times 10^6$ $B \bar{B}$  pairs produced in $e^+ e^-$ annihilation through the
$\Ypsilon(4S)$ resonance.  We find the branching fraction   ${\cal B}(B^0 \rightarrow a_1^+(1260) \pi^-) = (42.6 \pm 4.2 \pm 4.1) \times 10^{-6}$.  
The fitted values of the $a_1(1260)$ parameters are $m_{a_1}=1.19 \pm 0.02$ $GeV/c^2$ and
$\Gamma_{a_1} = 312 \pm 55$ $MeV/c^2$.



Revisions and Files 1 revised June 30, 2004
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File Name File Type File Format File Size (Kb) Comments
10-AUG-2004 abstract Abstract txt 0.63
10-AUG-2004 babar-conf-04002.pdf Paper (journal paper or conference submission by BABAR Collaboration) pdf 175.31 Submitted to ICHEP (JRF)
10-AUG-2004 babar-conf-04002.ps Paper (journal paper or conference submission by BABAR Collaboration) ps.gz 362.67
10-AUG-2004 fig01.eps Figure or plot eps 667.87
10-AUG-2004 fig02.eps Figure or plot eps 657.26
10-AUG-2004 fig03.eps Figure or plot eps 662.51
10-AUG-2004 fig04.eps Figure or plot eps 651.81
Submitted To2004 International Conference on High Energy Physics
Categories
  • AWG: Charmless Q2-body