High $p_T$ Hadron Production in Photon - Photon Collisions

We have studied the properties of hadron production in photon-photon scattering with tagged photons at the e + e − storage ring PETRA. A tail in the p T distribution of particles consistent with p T −4 has been observed. We show that this tail cannot be due to the hadronic part of the photon. Selected events with high p T particles are found to be consistent with a two-jet structure as expected from a point-like coupling of the photons to quarks. The lowest-order cross section predicted for γγ → q q , σ = 3 Σ e q 4 · σ γγ → μμ , is approached from above by the data at large transverse momenta.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: INCLUSIVE REACTION
EXCHANGE: TWO-PHOTON
TWO-PHOTON: EXCHANGE
PHOTON PHOTON: INTERACTION
INTERACTION: PHOTON PHOTON
TRANSVERSE MOMENTUM: HIGH
HADRON: MULTIPLE PRODUCTION
MULTIPLE PRODUCTION: HADRON

References(12)

Figures(0)

Hadron Production From Photon - Photon Interactions in the Center-of-mass Energy Range From 1-{GeV} to 5-{GeV}

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High pTp_TpT​ Hadron Production in Photon - Photon Collisions

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High $p_T$ Hadron Production in Photon - Photon Collisions