A T-odd asymmetry in neutralino production and decay

Autor(en)

Alfred Bartl, Stefan Hesselbach, Karl Hohenwarter-Sodek, Hans Fraas, Gudrid Moortgat-Pick

Abstrakt

We study CP-violating effects in neutralino production and subsequent decay within the Minimal Supersymmetric Standard Model with complex parameters M 1 and μ. The observable we propose is a T-odd asymmetry based on a triple product in neutralino production e+e- → χ̃i0χ̃i0, i = 1,...,4, with subsequent leptonic three-body decay χ̃i0 → χ̃i0l+l -, l = e, μ, at an e+e- linear collider with √s = 500 GeV and polarised beams. We provide compact analytical formulae for the cross section and the T-odd asymmetry taking into account the complete spin correlations between production and decay. We give numerical predictions for the cross section and the T-odd asymmetry. The asymmetry can go up to 10%. © SISSA/ISAS 2004.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Julius-Maximilians-Universität Würzburg, Durham University

Journal

Journal of High Energy Physics

Band

2004

Anzahl der Seiten

28

ISSN

1029-8479

DOI

https://doi.org/10.1088/1126-6708/2004/08/038

Publikationsdatum

2004

Peer-reviewed

Ja

ÖFOS 2012

103036 Theoretische Physik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/a-todd-asymmetry-in-neutralino-production-and-decay(24e36f5b-3ad6-4bf6-a012-407d0dc1bb03).html