Potential of a linear collider for lepton flavour violation studies in the susy seesaw

3rd Symposium on Prospects in the Physics of Discrete Symmetries

Figueiredo, António J. R.^1 ; Abada, A.^2 ; Romão, J.C.^1 ; Teixeira, A.M.^3

CFTP, Departamento de Física, Instituto Superior Técnico, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal^1

Laboratoire de Physique Théorique, CNRS-UMR 8627, Université de Paris-Sud 11, F-91405 Orsay Cedex, France^2

Laboratoire de Physique Corpusculaire, CNRS/IN2P3-UMR 6533, Campus des Cézeaux, 24 Av. des Landais, F-63177 Aubière Cedex, France^3

关键词: Charged current;    Charged leptons;    Energy dependence;    Final state;    Lepton flavour violations;    Linear colliders;    Neutrino mass;    Standard model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/447/1/012035/pdf
DOI  :  10.1088/1742-6596/447/1/012035

来源: IOP

【 摘 要 】

We study the potential of an e±e-Linear Collider for charged lepton flavour violation studies in a supersymmetric framework where neutrino masses and mixings are explained by a type-I seesaw. Focusing on e-μ flavour transitions, we evaluate the background from standard model and supersymmetric charged currents to the eμ + signal. We study the energy dependence of both signal and background, and the effect of beam polarisation in increasing the signal over background significance. Finally, we consider the μ-μ-+ final state in e-e-collisions that, despite being signal suppressed by requiring two e-μ flavour transitions, is found to be a clear signature of charged lepton flavour violation due to a very reduced standard model background. This contribution summarises part of the work done in [1].