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PUB-09/030 Observation of inclusive $D^{*\pm}$ production in the decay of $\Upsilon(1S)$
Doc Type Journal Papers
Record Created July 27, 2009
SLAC-PUB
SLAC-PUB-13837  No citations
Preprint # 0911.2024
Accession Code DLR1026
Abstract
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\begin{abstract}
We present a study of the inclusive $D^{*\pm}$ production in the decay
of $\Upsilon(1S)$ using $(98.6 \pm 0.9)\times 10^6$ $\Upsilon(2S)$
mesons collected 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 $\Upsilon(2S)$
resonance. Using the decay chain $\Upsilon(2S)\to \pi^+ \pi^- \Upsilon(1S),\;
\Upsilon(1S) \to D^{*\pm} X$, where $X$ is unobserved, we measure the
branching fraction $\BR[\Upsilon(1S)\to D^{*\pm} X] = (2.52 \pm
0.13({\rm stat}) \pm 0.15({\rm syst}))\%$ and the $D^{*\pm}$ momentum
distribution in the rest frame of the $\Upsilon(1S)$. We find evidence for an
excess of $D^{*\pm}$ production over the expected rate from the
virtual photon annihilation process $\Upsilon(1S)\to\gamma^*\to c\bar c\to
D^{*\pm} X$.

\end{abstract}

Revisions and Files 1 revised July 27, 2009
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File Name File Type File Format File Size (Kb) Comments
10-NOV-2009 abstract.tex Abstract txt 0.82
10-NOV-2009 babar-pub-0903.pdf Paper (journal paper or conference submission by BABAR Collaboration) pdf 212.63
10-NOV-2009 babar-pub-0903.ps.gz Paper (journal paper or conference submission by BABAR Collaboration) ps.gz 193.15
10-NOV-2009 fig01.eps Figure or plot eps 20.65
11-FEB-2010 fig02.eps Figure or plot eps 13.94
10-NOV-2009 fig03.eps Figure or plot eps 9.46
10-NOV-2009 fig04.eps Figure or plot eps 12.15
Submitted ToPhysical Review D - Rapid Communications
Date SubmittedNovember 10, 2009
Journal Year2010
Journal Volume81
Journal Article/Page Range011102
Categories
  • AWG: Charmonium