Single- and multi-photon production in ee collisions at s√ up to 209 GeV

Heister, A. and ALEPH Collaboration, The and Bouhova-Thacker, Evelina and Bowdery, Christopher and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Smizanska, Maria (2003) Single- and multi-photon production in ee collisions at s√ up to 209 GeV. European Physical Journal C: Particles and Fields, 28 (1). pp. 1-13. ISSN 1434-6044

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Abstract

Events containing only energetic photons are analysed in a sample of 628pb−1 of data recorded from e+e− collisions at centre-of-mass energies between 189 and 209 GeV by the ALEPH detector at LEP. The e+e−→νν¯γ(γ) and e+e−→γγ(γ) cross sections are measured and found to be in agreement with the standard model predictions. The number of light neutrino generations is determined to be Nν=2.86±0.09 . Upper limits are derived on the cross sections for photon production in the context of several supersymmetric models. Limits are also set on the parameters of models with extra spatial dimensions, with contact interactions and with excited electrons.

Item Type: Journal Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 26338
Deposited By: Dr Maria Smizanska
Deposited On: 01 May 2009 14:15
Refereed?: Yes
Published?: Published
Last Modified: 17 Sep 2019 00:43
URI: https://eprints.lancs.ac.uk/id/eprint/26338

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