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Measurement of the cross-section for the process γγ→pp¯ at √see=183−189GeV at LEP

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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<mark>Journal publication date</mark>05/2003
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number1
Volume28
Number of pages10
Pages (from-to)45-54
Publication StatusPublished
<mark>Original language</mark>English

Abstract

The exclusive production of proton-antiproton pairs in the collisions of two quasi-real photons has been studied using data taken at √see = 183 GeV and 189 GeV with the OPAL detector at LEP. Results are presented for pp¯ invariant masses, W, in the range 2.15 <W < 3.95 GeV. The cross-section measurements are compared with previous data and with recent analytic calculations based on the quark-diquark model.