Eur. Phys. J. A (2007) 31: 474-478
https://doi.org/10.1140/epja/i2006-10249-7

QNP 2006

The Kπ and ππ S-wave amplitude from D-meson decays

Centro Brasileiro de Pesquisas Fısicas, 22290-180, Rio de Janeiro, RJ, Brazil

^* e-mail: alberto@cbpf.br

Received: 23 November 2006
Accepted: 30 November 2006
Published online: 9 March 2007

Abstract

The issue of Kπ and ππ S-wave amplitude is addressed using decays of D-mesons. Model-independent measurements of the phases of the π ⁺ π ⁺ and K ^- π ⁺ S-wave amplitude from D ⁺→π ^- π ⁺ π ⁺ and D ⁺→K ^- π ⁺ π ⁺ decays are discussed. The result indicates a deviation from the phase of the K ^- π ⁺ S-wave amplitude obtained by scattering experiments. This could be interpreted as an indication of the presence of 3-body final-state interaction, or in other words, that the phases from production and scattering process cannot be directly compared.