Abstract: The process e+ e- -> n gamma with n>=2 is studied at centre-of-mass energies ranging from \root(s)=192 to 208 GeV. The data sample corresponds to a total integrated luminosity of 427 1/pb. The total and differential cross sections are found to be in agreement with the QED expectations. Using all the data collected with the L3 detector above the Z pole, limits on deviations from QED, excited electrons, contact interactions, extra space dimensions and excited spin-3/2 leptons are set.
Study of multiphoton final states and tests of QED in e+ e- collisions at S**(1/2) up to 209-GeV
BATTISTON, Roberto;BERTUCCI, Bruna;AMBROSI, Giovanni;BURGER, WILLIAM J.;FIANDRINI, Emanuele;CECCHI, Claudia;PAULUZZI, Michele;
2002
Abstract
Abstract: The process e+ e- -> n gamma with n>=2 is studied at centre-of-mass energies ranging from \root(s)=192 to 208 GeV. The data sample corresponds to a total integrated luminosity of 427 1/pb. The total and differential cross sections are found to be in agreement with the QED expectations. Using all the data collected with the L3 detector above the Z pole, limits on deviations from QED, excited electrons, contact interactions, extra space dimensions and excited spin-3/2 leptons are set.File in questo prodotto:
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