Aspects of two photon physics at linear e+ e- colliders
Mar, 199263 pages
Published in:
- Z.Phys.C 59 (1993) 591-616
e-Print:
- hep-ph/9203219 [hep-ph]
DOI:
Report number:
- DESY-92-044,
- BU-92-1
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Abstract:
We discuss various reactions at future e+e- and gamma-gamma colliders involving real (beamstrahlung or backscattered laser) or quasi--real (bremsstrahlung) photons in the initial state and hadrons in the final state. The production of two central jets with large pT is described in some detail; we give distributions for the rapidity and pT of the jets as well as the di--jet invariant mass, and discuss the relative importance of various initial state configurations and the uncertainties in our predictions. We also present results for `mono--jet' production where one jet goes down a beam pipe, for the production of charm, bottom and top quarks, and for single production of W and Z bosons. Where appropriate, the two--photon processes are compared with annihilation reactions leading to similar final states. We also argue that the behaviour of the total inelastic gamma-gamma cross section at high energies will probably have little impact on the severity of background problems caused by soft and semi--hard (`minijet') two--photon reactions. We find very large differences in cross sections for all two--photon processes between existing designs for future e+e- colliders, due to the different beamstrahlung spectra; in particular, both designs with <<1 and >>1 events per bunch crossing exist.- electron positron: linear collider
- photon photon: interaction
- interaction: photon photon
- beam: radiation
- radiation: beam
- radiation: laser
- photon electron: backscatter
- backscatter: photon electron
- jet: electroproduction
- electroproduction: jet
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