Cross sections, angular distributions and forward-backward asymmetries are presented, of two-fermion events produced in e(+)e(-) collisions at centre-of-mass energies from 189 to 209 GeV at LEP, measured with the ALEPH detector. Results for e(+)e(-), mu(+)mu(-), tau(+)tau(-), q (q) over bar, b (b) over bar and c (c) over bar production are in agreement with the standard model predictions. Constraints are set on scenarios of new physics such as four-fermion contact interactions, leptoquarks, Z' bosons, TeV-scale quantum gravity and R-parity violating squarks and sneutrinos.
Fermion pair production in e+e− collisions at 189-209 GeV and constraints on physics beyond the Standard Model
SELVAGGI, Giovanna;NUZZO, Salvatore Vitale;DE PALMA, Mauro
2007-01-01
Abstract
Cross sections, angular distributions and forward-backward asymmetries are presented, of two-fermion events produced in e(+)e(-) collisions at centre-of-mass energies from 189 to 209 GeV at LEP, measured with the ALEPH detector. Results for e(+)e(-), mu(+)mu(-), tau(+)tau(-), q (q) over bar, b (b) over bar and c (c) over bar production are in agreement with the standard model predictions. Constraints are set on scenarios of new physics such as four-fermion contact interactions, leptoquarks, Z' bosons, TeV-scale quantum gravity and R-parity violating squarks and sneutrinos.File in questo prodotto:
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