# Study of Multiphoton Final States and Tests of QED in $e^+ e^-$ collisions at $\sqrt{s}$ up to 209 GeV

3 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
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.
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Journal articles
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Cited literature [14 references]

http://hal.in2p3.fr/in2p3-00011506
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Submitted on : Monday, May 27, 2002 - 2:11:52 PM
Last modification on : Friday, September 10, 2021 - 1:50:05 PM
Long-term archiving on: : Tuesday, June 2, 2015 - 12:25:40 PM

### Identifiers

• HAL Id : in2p3-00011506, version 1

### Citation

P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, et al.. Study of Multiphoton Final States and Tests of QED in $e^+ e^-$ collisions at $\sqrt{s}$ up to 209 GeV. Physics Letters B, Elsevier, 2002, 531, pp.28-38. ⟨in2p3-00011506⟩

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