CP asymmetries with Longitudinal and Transverse Beam Polarizations in Neutralino Production and Decay into the Z Boson at the ILC

Autor(en)

Alfred Bartl, Karl Hohenwarter-Sodek, Thomas Kernreiter, Olaf Kittel

Abstrakt

We study neutralino production at the linear collider with the subsequent two-body decays (chi) over tilde (0)(i) -> (chi) over tilde (0)(n)Z(0) and Z(0) -> lar>, l = e, mu, tau, or Z(0)-> q (q) over bar with q = c,b. We show that transverse electron and positron beam polarizations allow the definition of unique CP observables. These are azimuthal asymmetries in the distributions of the final leptons or quarks. We calculate these CP asymmetries and the cross sections in the Minimal Supersymmetric Standard Model with complex higgsino and gaugino parameters mu and M-1. For final quark pairs, we find CP asymmetries as large as 30%. We discuss the significances for observing the CP asymmetries at the International Linear Collider (ILC). Finally we compare the CP asymmetries with those asymmetries which require unpolarized and/or longitudinally polarized beams only.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Rheinische Friedrich-Wilhelms-Universität Bonn

Journal

Journal of High Energy Physics

Band

2007

Anzahl der Seiten

23

ISSN

1029-8479

DOI

https://doi.org/10.1088/1126-6708/2007/09/079

Publikationsdatum

2007

Peer-reviewed

Ja

ÖFOS 2012

103034 Teilchenphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/cp-asymmetries-with-longitudinal-and-transverse-beam-polarizations-in-neutralino-production-and-decay-into-the-z-boson-at-the-ilc(747eb30d-ee03-4308-80c5-3764402b07b3).html