Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coupling constant for $\Lambda(1405)\bar{K}N$   The value of the $\Lambda(1405){\bar K}N$ coupling constant
$g_{\Lambda(1405)\bar{K}N}$ is obtained by fitting it to the experimental data
on the total cross sections of the $K^-p \to \pi^0\Sigma^0$ reaction. On the
basis of an effective Lagrangian approach and isobar model, we show that the
value $|g_{\Lambda(1405)\bar{K}N}| = 1.51 \pm 0.10$ could be extracted from the
available experimental data by assuming that the $s-$channel $\Lambda(1405)$
resonance plays a dominant role, whereas, the background contributions from the
$s-$channel $\Lambda(1115)$, $t-$channel $K^*$ and $u-$channel nucleon pole
processes are small and can be neglected. However, the $u-$channel nucleon pole
diagram may also give an important contribution in the present calculations.
After the background contributions are taken into account, the above value of
$g_{\Lambda(1405)\bar{K}N}$ is reduced to $|g_{\Lambda(1405)\bar{K}N}| = 0.77
\pm 0.07$, which is not supported by the previous calculations and the recent
CLAS measurements. The theoretical calculations on differential cross sections
are also presented, which can be checked by future experiments.

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The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: physics
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The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas