# Fermion pair production in $e^+e^-$ collisions at 189-209 GeV and constraints on physics beyond the Standard Model

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-, qq, bb and cc 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.

http://hal.in2p3.fr/in2p3-00114511
Contributor : Claudine Bombar <>
Submitted on : Thursday, November 16, 2006 - 5:40:36 PM
Last modification on : Thursday, March 5, 2020 - 6:20:14 PM

### Citation

S. Schael, R. Barate, R. Brunelière, I. de Bonis, D. Decamp, et al.. Fermion pair production in $e^+e^-$ collisions at 189-209 GeV and constraints on physics beyond the Standard Model. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2007, 49, pp.411-437. ⟨10.1140/epjc/s10052-006-0156-8⟩. ⟨in2p3-00114511⟩

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