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Fermion pair production in e+e- collisions at 189–209 GeV and constraints on physics beyond the standard model

Research output: Contribution to journalJournal article

  • ALEPH Collaboration
<mark>Journal publication date</mark>2007
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number2
Number of pages27
Pages (from-to)411-437
<mark>Original language</mark>English


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-, μ+μ-, τ+τ-, qq̄, bb̄ and cc̄ 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.