Exclusive production of pion and kaon meson pairs in two photon collisions at LEP

Exclusive production of π and K meson pairs in two photon collisions is measured with ALEPH data collected between 1992 and 2000. Cross-sections are presented as a function of cos θ ∗ and invariant mass, for | cos θ ∗ |<0.6 and invariant masses between 2.0 and 6.0 GeV/ c 2 (2.25 and 4.0 GeV/ c 2 ) for pions (kaons). The shape of the distributions are found to be well described by QCD predictions but the data have a significantly higher normalization.

electron positron: colliding beams
exchange: two-photon
photon photon: exclusive reaction
pi: pair production
K: pair production
differential cross section: energy dependence
angular distribution
mass spectrum
ALEPH
experimental results

References(16)

Figures(0)

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