$K^0_{S} K^0_{S}$ final state in two photon collisions and implications for glueballs

The K 0 S K 0 S final state in two-photon collisions is studied with the L3 detector at LEP. The mass spectrum is dominated by the formation of the f ′ 2 (1525) tensor meson in the helicity-two state with a two-photon width times the branching ratio into K K ̄ of 76±6±11 eV. A clear signal for the formation of the f J (1710) is observed and it is found to be dominated by the spin-two helicity-two state. No resonance is observed in the mass region around 2.2 GeV and an upper limit of 1.4 eV at 95% C.L. is derived for the two-photon width times the branching ratio into K 0 S K 0 S for the glueball candidate ξ (2230).

Note:

Dedicated to the memory of Prof. Bianca Monteleoni

electron positron: colliding beams
exchange: two-photon
photon photon: interaction
K0(S): pair production
glueball: search for
mass spectrum: (2K0(S))
f2(1525)
f0(1710)
f4(2220)
angular distribution

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