Production of jets and single particles at large transverse momentum in photon-photon collisions

Photon-photon collisions will be a copious source of jets and single particles produced with large transverse momentum in

e^{+} e^{-}

storage rings. These jets and single particles have topological properties which allow them to be easily distinguished from

e^{+} e^{-}

annihilation events. They arise from several sources: (a) quark exchange in

γ γ \to q \bar{q}

,(b) quantum-chromodynamics induced processes such as

γ_{1} \to q \bar{q}

and

γ_{2} \to q \bar{q}

, with

qq

scattering via vector-gluon exchange, and (c) differential cross sections proportional to

{p_{T}}^{- 6}

and

{p_{T}}^{- 8}

at fixed

x_{T} = \frac{2 p_{T}}{\sqrt{s}}

and fixed

θ_{c . m .}

characteristic of the constituent-interchange-model (CIM) picture. In particular, we predict

\frac{Ed σ}{d^{3} p} (e^{+} e^{-} \to e^{+} e^{-} + jet + X) \sim 0.03 (1 - x_{T}) {p_{T}}^{- 4}

nb Ge

V^{2}

for

p_{T} > 4

GeV/c, characteristic of the simplest quark-exchange process, and

\frac{Ed σ}{d^{3} p} (e^{+} e^{-} \to e^{+} e^{-} π X) \sim {(1 - x_{T})}^{2} {p_{T}}^{- 6}

nb Ge

V^{4}

for

p_{T} > 2

GeV/c, characteristic of the CIM subprocess

γ q \to π q

. Remarkably, the jet-trigger cross sections

\frac{Ed σ}{d^{3} p} (γ γ \to

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