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

Author(s): Schael S., Jacholkowska Agnieszka, Barate R., Brunelière R., De Bonis I., Decamp D., Goy C., Jézéquel S., Lees J.P., Martin F., Merle E., Minard M.N., Pietrzyk B., Trocmé B., Badaud F., Dessagne S., Falvard A., Fayolle D., Gay P., Jousset J., Michel B., Monteil S.

(Article) Published: European Physical Journal C, vol. 49 p.411-437 (2007)
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DOI: 10.1140/epjc/s10052-006-0156-8
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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.



Comments: to be published in The European Physical Journal C - ALEPH