2023 Impact factor 4.2
Particles and Fields
Eur. Phys. J. C 11, 383-407
DOI 10.1007/s100529900190

Measurement and interpretation of fermion-pair production at LEP energies from 130 to 172 GeV

The DELPHI Collaboration

P.Abreu21 - et al.

21 LIP, IST, FCUL - Av. Elias Garcia, 14-1o, 1000 Lisboa Codex, Portugal

Received: 9 February 1999 / Published online: 14 October 1999

The data collected with the DELPHI detector at centre-of-mass energies between 130 and 172  $\mbox{\rm {GeV}}$, during LEP operation in 1995 and 1996, have been used to determine the hadronic and leptonic cross-sections and leptonic forward-backward asymmetries. In addition, the cross-section ratios and forward-backward asymmetries for flavour-tagged samples of light (uds), c and b quarks have been measured. No significant deviations from the Standard Model expectations are found.
The results are interpreted by performing S-matrix fits to these data and to the data collected previously at the energies near the ${\rm Z}^0$ resonance peak (88-93  $\mbox{\rm {GeV}}$). The results are also interpreted in terms of physics beyond the Standard Model: contact interactions, R-parity violating SUSY particle exchange and of possible Z' bosons.

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