CP sensitive observables in e+e- -> neutralino_i neutralino_j and neutralino decay into the Z boson

Details CP sensitive observables in e+e- -> neutralino_i neutralino_j and neutralino decay into the Z boson CP sensitive observables in e+e- -> neutralino_i neutralino_j and neutralino decay into the Z boson

2004-02-02

arxiv.org/abs/hep-ph/0402016v2

Eur.Phys.J. C36 (2004) 233-243

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 8 figures, comments and references added; version to appear in Eur. Phys. J. C

Scientific paper

10.1140/epjc/s2004-01893-2

We study CP sensitive observables in neutralino production e+e- -> neutralino_i neutralino_j and the subsequent two-body decays of the neutralino neutralino_i -> neutralino_n Z and of the Z boson Z -> l \bar l (q \bar q). We identify the CP odd elements of the Z boson density matrix and propose CP sensitive triple-product asymmetries. We calculate these observables and the cross sections in the Minimal Supersymmetric Standard Model with complex parameters \mu and M_1 for an e+e- linear collider with \sqrt{s}=800 GeV and longitudinally polarized beams. We show that the asymmetries can reach 3% for Z -> l \bar l and 18% for Z -> q \bar q and discuss the feasibility of measuring these asymmetries.

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