On the \phi(1020)f_0(980) S-wave scattering and the Y(2175) resonance

TL;DR

This paper investigates the S-wave scattering of 020 and f_0(980) mesons near threshold using chiral Lagrangians, demonstrating that the Y(2175) resonance emerges from their interactions and has a significant meson-meson component.

Contribution

It introduces a novel approach to generate the Y(2175) resonance through 020-f_0(980) interactions using chiral Lagrangians and models f_0(980) as a KK bound state.

Findings

Successfully describes recent e^+e^- 020f_0(980) scattering data.

Supports the interpretation of Y(2175) as a meson-meson molecular state.

Shows the Y(2175) has a large 020f_0(980) component.

Abstract

We have studied the \phi(1020)f_0(980) S-wave scattering at energies around threshold employing chiral Lagrangians coupled to vector mesons through minimal coupling. The interaction kernel is obtained by considering the f_0(980) as a K\bar{K} bound state. The Y(2175) resonance is generated in this approach by the self-interactions between the \phi(1020) and the f_0(980) resonances. We are able to describe the e^+e^-\to \phi(1020)f_0(980) recent scattering data to test experimentally our scattering amplitudes, concluding that the Y(2175) resonance has a large \phi(1020)f_0(980) meson-meson component.