Optimal polarized observables for model-independent new-physics search at e+e- colliders

Details Optimal polarized observables for model-independent new-physics search at e+e- colliders Optimal polarized observables for model-independent new-physics search at e+e- colliders

1999-10-19

arxiv.org/abs/hep-ph/9910403v2

Phys.Lett.B476:95-106,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, LaTeX, including figures; minor clarifications, 1 reference added. Version to appear in PLB

Scientific paper

10.1016/S0370-2693(00)00103-9

For the processes e+e-\to \mu+\mu-, \tau+\tau-, b\bar{b} and c\bar{c} at a future e+e- collider with \sqrt{s}=0.5 TeV, we examine the sensitivity of the helicity cross sections to four-fermion contact interactions. If longitudinal polarization of the electron beam were available, two polarized integrated cross sections would offer the opportunity to separate the helicity cross sections and, in this way, to derive model-independent bounds on the relevant parameters. The measurement of these polarized cross sections with optimal kinematical cuts could significantly increase the sensitivity of helicity cross sections to contact interaction parameters and could give crucial information on the chiral structure of such new interactions.

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