Scalar Mesons in $π π$ and $\bar{K} K$ : Results of a Unitary Amplitude Analysis

Publisher Website

3 November 1980

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 45 (18) , 1469-1472
https://doi.org/10.1103/physrevlett.45.1469

Abstract

The

π π \to \bar{K} K

S

wave has been extracted from an amplitude analysis of

\bar{K} K

production. With use of unitarity constraints, evidence has been found for a resonance in

π π \to \bar{K} K

at 1425±15

{M e V / c}^{2}

having a width 160±30

{M e V / c}^{2}

; this state is a likely candidate for the

Q \bar{Q}

,

J^{PC} = 0^{+ +}

nonet. It is shown that the

S^{*} (980)

, which is a background to this resonance, must be a very broad effect and is likely a

\bar{K} K

virtual bound state.

Keywords

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