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An experimental study of γγ → hadrons at LEP

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • ALEPH Collaboration
<mark>Journal publication date</mark>1993
<mark>Journal</mark>Physics Letters B
Issue number3-4
Number of pages11
Pages (from-to)509-519
Publication StatusPublished
<mark>Original language</mark>English


An analysis of γγ interactions has been performed using untagged hadronic data obtained by the ALEPH detector at LEP. The data show at low transverse momentum (pt) are well reproduced by a model based on the vector meson dominance mechinism (VDM). At high ptthrust the presence of hard scattering processes is demonstrated. This component is well described in shape and normalization by a QCD calculation.