Proton-Antiproton Pair Production in Two-Photon Collisions at LEP
L3 collaboration
TL;DR
This study measures the differential cross section of proton-antiproton pair production in two-photon collisions at LEP energies, providing data to test different theoretical models of baryon structure.
Contribution
It presents the first measurement of gamma gamma -> proton-antiproton differential cross sections at LEP energies, comparing results with three-quark and quark-diquark models.
Findings
Measured cross sections from 2.1 to 4.5 GeV in two-photon energy.
Data favor the quark-diquark model over the three-quark model.
Provides new experimental input for baryon structure theories.
Abstract
The reaction e^+e^- -> e^+e^- proton antiproton is studied with the L3 detector at LEP. The analysis is based on data collected at e^+e^- center-of-mass energies from 183 GeV to 209 GeV, corresponding to an integrated luminosity of 667 pb^-1. The gamma gamma -> proton antiproton differential cross section is measured in the range of the two-photon center-of-mass energy from 2.1 GeV to 4.5 GeV. The results are compared to the predictions of the three-quark and quark-diquark models.
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