Contact interactions are searched for using the differential cross sections for the reactions e+e-→e+e-, e+e-→μ+μ-, e+e-→τ+τ- and e+e-→γγ measured at 12 energies around the Z peak and corresponding to about 20 pb-1 of cumulated luminosity. Four-fermion contact term models assuming various chiralities of lepton currents are fitted to the lepton data and lower limits on the energy scale Λ of such terms are set at 95% c.l. The limits vary in the range 0.9-4.7 TeV, depending on the model and on the lepton flavour. The eeγγ contact terms are searched for assuming various chiralities. Limits on the energy scale Λ between 79 and 130 GeV are extracted from the data. The results are compared and combined with those reported at lower energies.

Buskulic, D., Decamp, D., Goy, C., Lees, J., Minard, M., Mours, B., et al. (1993). Search for contact interactions in the reactions e+e-→l+l- and e+e-→γγ. ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS, 59(2), 215-229 [10.1007/BF01566686].

Search for contact interactions in the reactions e+e-→l+l- and e+e-→γγ

CARPINELLI, Massimo;
1993

Abstract

Contact interactions are searched for using the differential cross sections for the reactions e+e-→e+e-, e+e-→μ+μ-, e+e-→τ+τ- and e+e-→γγ measured at 12 energies around the Z peak and corresponding to about 20 pb-1 of cumulated luminosity. Four-fermion contact term models assuming various chiralities of lepton currents are fitted to the lepton data and lower limits on the energy scale Λ of such terms are set at 95% c.l. The limits vary in the range 0.9-4.7 TeV, depending on the model and on the lepton flavour. The eeγγ contact terms are searched for assuming various chiralities. Limits on the energy scale Λ between 79 and 130 GeV are extracted from the data. The results are compared and combined with those reported at lower energies.
Articolo in rivista - Articolo scientifico
Physics
English
215
229
15
Buskulic, D., Decamp, D., Goy, C., Lees, J., Minard, M., Mours, B., et al. (1993). Search for contact interactions in the reactions e+e-→l+l- and e+e-→γγ. ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS, 59(2), 215-229 [10.1007/BF01566686].
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