Tests of the standard model and constraints on new physics from measurements of fermion pair production at 189-GeV at LEP - INSPIRE

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Tests of the standard model and constraints on new physics from measurements of fermion pair production at 189-GeV at LEP

OPAL

Collaboration

•

G. Abbiendi

Jul, 1999

43 pages

Published in:

Eur.Phys.J.C 13 (2000) 553-572

e-Print:

hep-ex/9908008 [hep-ex]

DOI:

PDG: Mass Limits on

\mathit M_{\mathit TT}

Report number:

CERN-EP-99-097

Experiments:

CERN-LEP-OPAL

View in:

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reference search115 citations

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Abstract:

Cross-sections and angular distributions for hadronic and lepton pair final states in e+e- collisions at a centre-of-mass energy near 189 GeV, measured with the OPAL detector at LEP, are presented and compared with the predictions of the Standard Model. The results are used to measure the energy dependence of the electromagnetic coupling constant alpha_em, and to place limits on new physics as described by four-fermion contact interactions or by the exchange of a new heavy particle such as a sneutrino in supersymmetric theories with R-parity violation. A search for the indirect effects of the gravitational interaction in extra dimensions on the mu+mu- and tau+tau- final states is also presented.

Note:

42 pages, LaTeX, including 14 eps figs, submitted to European Physical Journal C Report-no: CERN-EP/99-097

electron positron: colliding beams
electron positron: annihilation
fermion: pair production
electron
muon
tau
quark
hadron: multiple production
new particle: search for
new interaction: search for

References(73)

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