Measurements with Photons at Lep

Details Measurements with Photons at Lep Measurements with Photons at Lep

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003fuin.conf..218g&link_type=abstract

FUNDAMENTAL INTERACTIONS. Proceedings of the Seventeenth Lake Louise Winter Institute. Held 17-23 February 2002 in Lake Louise,

Computer Science

Scientific paper

Final states made exclusively of visible photons were studied at LEP, confirming the validity of the Standard Model of Electroweak Interactions at the highest energies ever achieved in an electron-positron collider. Neutrino - anti-neutrino pair production accompanied by Initial State Radiation (ISR), e^ + e^ - -> ν bar ν + γ s , was studied. The cross-section of the process was measured and found to be in agreement with the Standard Model prediction. Photonic final states were an especially powerful tool to test QED at LEP. The differential and total cross-sections of the process e+e- → γγ(γ) were measured and found to match the theory. 95% Confidence Level (C.L.) lower bounds on the parameterizations of theories predicting possible deviations from QED were derived combining the results obtained from the analyses of the data collected by the four LEP detectors.

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