Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Form Factors of Kaon Semileptonic Decays   A calculation of the semi--leptonic decays of the kaon ($K_{l3}$) is
presented. The results are direct predictions of a covariant model of the pion
and kaon introduced earlier by Ito, Buck, Gross. The weak form factors for
$K_{l3}$ are predicted with absolutely no parameter adjustments of the model.
We obtained for the form factor parameters:
$f_-(q^2=m_l^2)/f_+(q^2=m_l^2)=-0.28$ and $\lambda_+$= 0.028, both within
experimental error bars. Connections of this approach to heavy quark symmetry
will also be discussed.

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The categories of this paper are: supr-con
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The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
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The categories of this paper are: math-ph