${K_{1}}^{0} - {K_{2}}^{0}$ Mass Difference and Possibility of a $S$ -Wave Di-Pion Resonance Above 500 MeV

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21 November 1966

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

Vol. 17 (21) , 1102-1105
DOI:10.1103/physrevlett.17.1102

Abstract

Under the assumption that the sign and magnitude of

{K_{1}}^{0} - {K_{2}}^{0}

mass difference is due to the contribution of the two-pion intermediate state in the self-energy dispersion integral, it is found that the

I = 0

S

-wave pion-pion interaction is strong near the

K

mass. The possibility of a di-pion resonance above 500 MeV is suggested.

Keywords

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