Unitary coupled channel analysis of theΛ(1520)resonance

2006/03/27 by L. Roca, Sourav Sarkar, V. K. Magas +1
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Atomic and Subatomic Physics Research #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevc.73.045208

published as Phys.Rev.C73:045208,2006 · 21 pages, 9 figures

arxiv created 2006/03/27 · openalex publication_date 2006/04/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

We study the \ensuremathΛ(1520) resonance in a coupled-channel approach involving the \ensuremathπ\ensuremathΣ(1385),K\ensuremathΞ(1530),KN, and \ensuremathπ\ensuremathΣ channels. Implementing unitarity in coupled channels, we make an analysis of the relative importance of the different mechanisms that contribute to the dynamical structure of this resonance. From experimental information on some partial wave amplitudes and constraints imposed by unitarity, we get a comprehensive description of the amplitudes and hence the couplings to the different channels. We test these amplitudes in different reactions like K^\ensuremath-p\ensuremath→\ensuremathΛ\ensuremathπ\ensuremathπ,\ensuremathγp\ensuremath→K⁺K^\ensuremath-p,\ensuremathγp\ensuremath→K⁺\ensuremathπ⁰\ensuremathπ⁰\ensuremathΛ, and \ensuremathπ^\ensuremath-p\ensuremath→K⁰K^\ensuremath-p and find a fair agreement with the experimental data.

Citations

• Chiral unitary mesonâbaryon dynamics in the presence of resonances: elastic pionânucleon scattering
• Chiral symmetry amplitudes in the S-wave isoscalar and isovector channels and the σ, f0(980), a0(980) scalar mesons
• N/Ddescription of two meson amplitudes and chiral symmetry
• Λ(1405)production in theπ−p→K0πΣreaction
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

Cited by

• Case in favor of theN*(1700)(3/2−)