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Exclusive production of proton-antiproton pairs in photon-photon collisions

Research output: Contribution to journalJournal article

Published

Journal publication date1986
JournalPhysics Letters B
Journal number3
Volume174
Number of pages7
Pages350-356
Original languageEnglish

Abstract

Total and differential cross sections for exclusive production of proton-antiproton pairs in photon-photon collisions have been measured using the JADE detector at PETRA. The total cross section in the CM angular |cos θ∗| < 0.6 reaches a maximum value of 3.8 nb for a γγ invariant mass of Wγγ = 2.25 GeV, and decreases rapidly for higher values of Wγγ. In the range 2.0 GeV < Wγγ < 2.6 GeV the angular distribution is not isotopic. The nucleons are preferentially emitted at large angles to the collision axis.