Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-07-22
Nucl.Instrum.Meth.A355:19-41,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
uses PHYZZX, 52 pages, 30 figures (available upon request), SLAC-PUB-6571
Scientific paper
10.1016/0168-9002(94)01174-5
The collisions of high energy photons produced at an electron-positron collider provide a comprehensive laboratory for testing QCD, electroweak interactions, and extensions of the Standard Model. The luminosity and energy of the colliding photons produced by back-scattering laser beams is expected to be comparable to that of the primary $e^+e^-$ collisions. In this overview, we shall focus on tests of electroweak theory in photon-photon annihilation, particularly $\gamma\gamma \rightarrow W^+ W^-$, $\gamma\gamma \rightarrow $ Higgs bosons, and higher-order loop processes, such as $\gamma\gamma \rightarrow \gamma\gamma, Z \gamma$ and $ZZ.$ Since each photon can be resolved into a $W^+ W^-$ pair, high energy photon-photon collisions can also provide a remarkably background-free laboratory for studying $WW$ collisions and annihilation. We also review high energy $\gamma\gamma$ tests of quantum chromodynamics, such as the scaling of the photon structure function, $t \bar t$ production, mini-jet processes, and diffractive reactions.
Brodsky Stanley J.
DESY
SLAC
Zerwas Peter M.
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