Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for rare b-meson decays at CDF   We report on the search for $B^0_s\to\mu^+\mu^-$, $B^0_d\to\mu^+\mu^-$ decays
and $b\to s \mu^+\mu^-$ transitions in exclusive decays of B mesons using the
CDF II detector at the Fermilab Tevatron Collider. Using 2 fb$^{-1}$ of Run II
data we find upper limits on the branching fractions
$\mathcal{B}(B^0_s\to\mu^+\mu^-)<5.8\times 10^{-8}$ and
$\mathcal{B}(B^0_d\to\mu^+\mu^-)<1.8\times 10^{-8}$ at 95% confidence level.
The results for the branching fractions of the $b\to s \mu^+\mu^-$ transitions
using 924 pb$^{-1}$ of Run II data are
$\mathcal{B}(B^+\to\mu^+\mu^-K^+)=(0.60\pm0.15\pm0.04)\times 10^{-6}$,
$\mathcal{B}(B^0_d\to\mu^+\mu^-K^{*0})=(0.82\pm0.31\pm0.10)\times 10^{-6}$ and
$\mathcal{B}(B^0_s\to \mu^+\mu^-\phi)/\mathcal{B}(B^0_s\to J/\psi\phi) <
2.61\times 10^{-3}$ at 95% confidence level.

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The categories of this paper are: alg-geom
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
2
The categories of this paper are: math
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The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: stat