Hard photon production at s**(1/2) = 161-GeV and 172-GeV at LEP - INSPIRE

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Hard photon production at s**(1/2) = 161-GeV and 172-GeV at LEP

L3

Collaboration

Jul, 1997

12 pages

Published in:

Phys.Lett.B 413 (1997) 159-166

DOI:

10.1016/S0370-2693(97)01081-2

Report number:

CERN-PPE-97-077,
CERN-PPE-97-77

Experiments:

CERN-LEP-L3

View in:

CERN Document Server

reference search23 citations

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Abstract: (Elsevier)

We have studied the process e + e − → n γ (n ≥ 2) at centre-of-mass energies of 161.3 GeV and 172.1 GeV. The analysis is based on a sample of events collected by the L3 detector in 1996 corresponding to total integrated luminosities of 10.7 pb −1 and 10.1 pb −1 respectively. The observed rates of events with two and more photons and the characteristic distributions are in good agreement with the Standard Model expectations. This is used to set lower limits on contact interaction energy scale parameters, on the QED cut-off parameters and on the mass of excited electrons.

electron positron: colliding beams
electron positron: annihilation
photon: multiple production
new interaction: search for
model: composite
electroweak interaction: validity test
quantum electrodynamics: validity test
e*
mass: lower limit
L3

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Figures(0)

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