CP-sensitive observables in e^ + e^-→χ⁰_i χ⁰_j and neutralino decay into the Z boson

2004/02/29 by A. Bartl, H. Fraas, O. Kittel +1
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1140/epjc/s2004-01893-2

published as Eur.Phys.J. C36 (2004) 233-243 · 21 pages, 8 figures, comments and references added; version to appear in Eur. Phys. J. C

arxiv created 2004/06/25 · openalex publication_date 2004/07/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

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 l (q 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 μand M₁ for an e+e- linear collider with √(s)=800 GeV and longitudinally polarized beams. We show that the asymmetries can reach 3% for Z -> l l and 18% for Z -> q q and discuss the feasibility of measuring these asymmetries.

Related

• CP asymmetries in neutralino production
• CP violation in production of neutralinos in e+ e- collisions
• Impact of beam polarization on CP asymmetries in neutralino pair production
• CP Violation in Supersymmetry
• CP Violation in Production and Decay of Supersymmetric Particles