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

Research output: Contribution to journalJournal article

Published

Journal publication date01/2004
JournalNuclear Physics B - Proceedings Supplements
Journal number1
Volume126
Number of pages6
Pages289-294
Original languageEnglish

Abstract

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 σ* and invariant mass, for t|cosσ*|< 0.6 and invariant masses between 2.0 and 6.0 GeV/c2) for pions (kaons). The shape of the distributions are found to be well described by QCD predictions but the data have a significantly higher normalisation.