Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of Forward-Backward Asymmetry and Wilson Coefficients in $B
  \to K^* \ell^+ \ell^-$   We report the first measurement of the forward-backward asymmetry and the
ratios of Wilson coefficients $A_9/A_7$ and $A_{10}/A_7$ in $B \to K^* \ell^+
\ell^-$, where $\ell$ represents an electron or a muon. We observe a large
integrated forward-backward asymmetry with a significance of 3.4$\sigma$. The
results are obtained from a data sample containing 386 $\times 10^6$ $B\bar{B}$
pairs that were collected on the $\Upsilon(4S)$ resonance with the Belle
detector at the KEKB asymmetric-energy $e^+ e^-$ collider.

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The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: astro-ph