Model independent constraints on contact interactions from LEP2

Abstract

We quantitatively discuss the possibility of deriving model-independent constraints on the general four-fermion contact interaction couplings, from the currently available data on the two-fermion production processes $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}$, $b\bar{b}$ and $c\bar{c}$ with unpolarized initial beams. The method is essentially based on particular, simple, combinations of the measured total cross section and forward-backward asymmetry that allow partial separation of the helicity cross sections, and the combination of experimental data obtained at the different energies of TRISTAN, LEP1 and LEP2.

9 pages (Latex) with 6 figures and 1 table

References in corpus (5)

• Bounds on New Physics from the New Data on Parity Violation in Atomic Cesium
• Atomic Parity Violation, Leptoquarks, and Contact Interactions
• Measurement of the forward backward asymmetry of c and b quarks at the Z pole using reconstructed D mesons
• Optimal polarized observables for model-independent new-physics search at e+e- colliders
• Contact interaction probes at the Linear Collider with polarized electron and positron beams