The role of the $Λ(1405)$ in the $pp\to p K^+Λ(1405)$ reaction

Details The role of the $Λ(1405)$ in the $pp\to p K^+Λ(1405)$ reaction The role of the $Λ(1405)$ in the $pp\to p K^+Λ(1405)$ reaction

2007-07-23

arxiv.org/abs/0707.3343v3

Eur.Phys.J.A34:405-412,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

version to appear in European Physical Journal A; theoretical uncertainties reanalyzed, data updated according to the experime

Scientific paper

10.1140/epja/i2008-10518-5

We report a theoretical study of the $pp\to p K^+\Lambda(1405)$ reaction, which was recently investigated at COSY-J\"{u}lich by using a 3.65 GeV/c circulating proton beam incident on an internal hydrogen target. The reaction is driven by single kaon exchange, single pion exchange, and single rho exchange terms which have very different shapes due to the two pole structure of the $\Lambda(1405)$ and the presence of background terms. The shape for the sum of the three contributions, as well as the total cross section, are consistent with present data within experimental and theoretical uncertainties, using reasonable form factors for the meson-baryon vertices.

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