Eur. Phys. J. A (2006) 27: 207-212
https://doi.org/10.1140/epja/i2005-10264-2

Hadron Physics

The K⁰ _SK⁰ _S final state in two-photon collisions and SU(3) tensor nonets

Petersburg Nuclear Physics Institute, Gatchina, Russia

Received: 25 November 2005
Accepted: 23 February 2006
Published online: 31 March 2006

Abstract

The K⁰ _SK⁰ _S final state in two-photon collisions is studied with the L3 experiment at LEP, using orbital angular momentum operators. The mass spectrum is dominated by the formation of tensor mesons, their two-photon partial width are determined. A signal at 1700-1800MeV is found to be a new tensor state f ₂(1750) with mass M = (1755±10)MeV and width Γ = (67±12)MeV. All observed tensor resonances obey SU(3) relations. The f ₂(1750) state forms a second tensor nonet together with f ₂(1560) and a ₂(1700). The SU(3) analysis allows us to determine with good accuracy mixing angles between nonstrange and strange components of the isoscalar members of tensor nonets.