Study of the K(s)0 K(s)0 final state in two photon collisions - INSPIRE

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Study of the K(s)0 K(s)0 final state in two photon collisions

L3

Collaboration

Jul, 1995

15 pages

Published in:

Phys.Lett.B 363 (1995) 118-126

DOI:

10.1016/0370-2693(95)01041-N

Report number:

CERN-PPE-95-118

Experiments:

CERN-LEP-L3

View in:

CERN Document Server

reference search22 citations

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Abstract: (Elsevier)

The reaction e + e − → e + e − γ ∗ γ ∗ → e + e − K S 0 K S 0 is studied with the L3 detector at LEP and the formation of the f 2 ′(1525) resonance is observed. For an integrated luminosity of 114 pb −1 , 31±6 f 2 ′ events are found. Their angular distribution is consistent with a pure helicity two. The radiative width times the branching ratio is measured to be Γ γγ (f 2 ′)×Br(f 2 ′ → K K ) =(0.093±0.018±0.022) keV. Only three events are found in the f 2 (1270)−a 2 (1320) mass region, consistent with destructive f 2 −a 2 interference in the K S 0 K S 0 final state. The mixing angle of the tensor meson nonet is determined to the θ = (29.4 −1.6 +1.4 )°.

electron positron: colliding beams
colliding beams: electron positron
exchange: two-photon
two-photon: exchange
photon photon: exclusive reaction
K0(S): pair production
pair production: K0(S)
f2(1525): photoproduction
photoproduction: f2(1525)
f2(1525): hadronic decay

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