CP violation in X_1^0 X_2^0 production at a linear collider

Details CP violation in X_1^0 X_2^0 production at a linear collider CP violation in X_1^0 X_2^0 production at a linear collider

2004-04-13

arxiv.org/abs/hep-ph/0404104v2

Nucl.Phys. B697 (2004) 207-224

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex 17 pages, 17 figures. Added comments and references. To be publised in Nucl. Phys. B

Scientific paper

10.1016/j.nuclphysb.2004.07.013

We discuss the observability of CP-violating asymmetries in the process e+ e- -> X_1^0 X_2^0 -> X_1^0 X_1^0 l+ l-, with l = e,mu. We consider two examples of supersymmetric scenarios: (i) with decays X_2^0 -> l_R l -> X_1^0 l+ l-; (ii) with X_2^0 three-body decays. The asymmetries can be of order 0.1 but they are partially washed out by the large backgrounds from W+ W- and slepton pair production, being the observed asymmetries one order of magnitude smaller. However, with appropriate kinematical cuts they can be observed at an e+ e- collider with a centre of mass energy of 500 GeV and high luminosity.

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