Measurement of the proton - anti-proton pair production from two photon collisions at TRISTAN

The cross section of the γγ → p p reaction was measured at two-photon center-of-mass energy ( W γγ ) between 2.2 and 3.3 GeV, using the two-photon process at an e + e − collider, TRISTAN. The W γγ dependence of the cross section integrated over a c.m. angular region of | cos θ ∗ | < 0.6 is in good agreement with the previous measurements and the theoreticalv prediction based on diquark model in the high W γγ region.

electron positron: colliding beams
exchange: two-photon
photon photon: interaction
p: pair production
channel cross section: energy dependence
angular distribution
quark: diquark
VENUS
experimental results
KEK TRISTAN Stor

References(23)

Figures(0)

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