Two-particle kinematic distributions from new physics at an electron-positron collider with polarized beams

Details Two-particle kinematic distributions from new physics at an electron-positron collider with polarized beams Two-particle kinematic distributions from new physics at an electron-positron collider with polarized beams

2008-05-15

arxiv.org/abs/0805.2279v2

Eur.Phys.J.C56:171-179,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

v2 is now 18 pages long, latex, uses axodraw. Expanded version of v1 corresponding to version accepted for publication by Euro

Scientific paper

10.1140/epjc/s10052-008-0653-z

The kinematic distributions in two-particle inclusive processes at an e+e- collider arising from standard-model s-channel exchange of a virtual gamma or Z and the interference of the standard-model contribution with contributions from physics beyond the standard model involving s-channel exchanges are derived entirely in terms of the space-time signature of such new physics. Transverse as well as longitudinal polarizations of the electron and positron beams are taken into account. We show how these model-independent distributions can be used to deduce some general properties of the nature of the interaction. We then specialize to two specific two-particle final states, viz., ZH, where H is one of the Higgs bosons in a model with an extended Higgs sector, and f fbar, where f, fbar are a pair of conjugate charged fermions, wherein distributions of two (of the possibly several) decay products are measured. We show how some of the properties of the distributions have been realized in the analysis of physics beyond the standard model in earlier work which made use of two-particle angular distributions.

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