On the nature of the Lambda(1405) as a superposition of two states

Details On the nature of the Lambda(1405) as a superposition of two states On the nature of the Lambda(1405) as a superposition of two states

2005-12-29

arxiv.org/abs/hep-ph/0512361v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Contribution to the PANIC05 Conference, Santa Fe, October 2005

Scientific paper

10.1063/1.2220298

We use recent data on the $K^- p \to \pi^0 \pi^0 \Sigma^0$ reaction with the
$\pi^0 \Sigma^0$ mass distribution of forming the $\Lambda(1405)$ with a peak
at 1420 MeV and a relatively narrow width of $\Gamma = 38$ MeV, together with
those of the $\pi^- p \to K^0 \pi \Sigma$ reaction to show that there are two
$\Lambda(1405)$ states instead of one as so far assumed.

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