The production of final states involving one or more energetic photons from e+e- collisions at high energies is studied using data collected by the ALEPH detector at LEP. The data consist of two samples of 2.9 pb-1 each, recorded at centre-of-mass energies of 130 GeV and 136 GeV. The data are in agreement with the predictions of the Standard Model. From an analysis of two-photon final states new limits are placed on the parameters of models involving e+e-γγ contact interactions and excited electrons. The 95% confidence level lower limits on the QED cut-off parameters Λ+ and Λ- are found to be 169 and 132 GeV respectively.

Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1996). A study of single and multi-photon production in e+e- collisions at centre-of-mass energies of 130 and 136 GeV. PHYSICS LETTERS. SECTION B, 384(1-4), 333-342 [10.1016/0370-2693(96)00930-6].

A study of single and multi-photon production in e+e- collisions at centre-of-mass energies of 130 and 136 GeV

CARPINELLI, Massimo;
1996

Abstract

The production of final states involving one or more energetic photons from e+e- collisions at high energies is studied using data collected by the ALEPH detector at LEP. The data consist of two samples of 2.9 pb-1 each, recorded at centre-of-mass energies of 130 GeV and 136 GeV. The data are in agreement with the predictions of the Standard Model. From an analysis of two-photon final states new limits are placed on the parameters of models involving e+e-γγ contact interactions and excited electrons. The 95% confidence level lower limits on the QED cut-off parameters Λ+ and Λ- are found to be 169 and 132 GeV respectively.
Articolo in rivista - Articolo scientifico
Physics
English
1996
384
1-4
333
342
none
Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1996). A study of single and multi-photon production in e+e- collisions at centre-of-mass energies of 130 and 136 GeV. PHYSICS LETTERS. SECTION B, 384(1-4), 333-342 [10.1016/0370-2693(96)00930-6].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390224
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