ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We have measured Bhabha scattering at cms energies of 9.4, 13, 17, 22, 27.5, 30.0, and 31.6 GeV and the reactione + e -→μ + μ - at 9.4 GeV. The experiment covers spacelike momentum transfers up to −850 GeV2 and timelike momentum transfers up to 1,000 GeV2. We obtain good agreement with QED comparing differential cross sections (measured between 35° and 145°), acoplanarity distributions and the energy dependence (for Bhabha scattering). Defining possible modifications of QED in a model independent way we obtain stringent limits in the range of 70–200 GeV on cutoff parameters. We test to an accuracy of 5–8% the validity of some general principles of QED, such as pointlike coupling, crossing symmetry and μe-universality.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01421567
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