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PUB-06/035 Observation of e+e- Annihilation into the C=+1 Hadronic Final States rho0 rho0 and phi rho0
Doc Type Journal Papers
Record Created May 17, 2006
SLAC-PUB
SLAC-PUB-11923  No citations
Preprint # hep-ex/0606054
Abstract
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We report the first observation of $e^+e^-$ annihilations into
states of positive $C$-parity, 
namely $\rho^0 \rho^0$  and $\phi\rho^0$. 
The two states 
are observed in the $\pip\pim\pip\pim$ and $K^+K^-\pip\pim$
final states, respectively,
in a data sample of 225~$fb^{-1}$  collected by the $BaBar$~experiment at 
the  $PEP-II$ $e^+e^-$ storage rings at energies near 
$\sqrt{s}\! ~=$ 10.58~$GeV$. 
The distributions of  $\cos\theta^*$, where $\theta^*$ is the center-of-mass polar angle of the $\phi$ meson  or 
the forward $\rho^0$ meson, suggest production  by  two-virtual-photon annihilation. 
We measure cross sections within the range 
$|\cos\theta^*|\! ~<~ \! 0.8$  of 
$\sigma(\e^+e^-\!\! \to\! \rho^0 \rho^0)\! ~=~$$20.7 \pm 0.7 (\mathrm{stat})\pm 2.7(\mathrm{syst}) ~\mathrm{fb}$ and
$\sigma(\e^+e^-\!\! \to\! \phi \rho^0)\! ~=~$$5.7\pm 0.5(\mathrm{stat}) \pm 0.8(\mathrm{syst}) ~\mathrm{fb}$. 


Revisions and Files 1 revised May 17, 2006
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File Name File Type File Format File Size (Kb) Comments
23-JUN-2006 abstract.tex Abstract txt 0.89
23-JUN-2006 babar-pub-06035.pdf Paper (journal paper or conference submission by BABAR Collaboration) pdf 259.27
23-JUN-2006 babar-pub-06035.ps.gz Paper (journal paper or conference submission by BABAR Collaboration) ps.gz 2,804.15
23-JUN-2006 fig01.eps Figure or plot eps 602.84
23-JUN-2006 fig02.eps Figure or plot eps 614.05
23-JUN-2006 fig03.eps Figure or plot eps 1,003.45
23-JUN-2006 fig04.eps Figure or plot eps 743.98
23-JUN-2006 fig05.eps Figure or plot eps 622.78
23-JUN-2006 fig06.eps Figure or plot eps 631.78
Submitted ToPhysical Review Letters
Date SubmittedJune 22, 2006
Journal Year2006
Journal Volume97
Journal Article/Page Range112002
Categories
  • AWG: IS-ISR