Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-11-11
Acta Phys.Polon.B40:3143-3147,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 3 figures, to appear in Proceedings of the XXXIII Intl. Conf. of Theoretical Physics, "Matter to the Deepest", Ustron
Scientific paper
We report on our study of the LFV processes \mu \to e\gamma, \mu\to eee and \mu \to e conversion in the context of Little Higgs models. Specifically we examine the Littlest Higgs with T-parity (LHT) and the Simplest Little Higgs (SLH) as examples of a Product group and Simple group Little Higgs models respectively. The necessary Feynman rules for both models are obtained in the 't Hooft Feynman Gauge up to order v^2/f^2 and predictions for the branching ratios and conversion rates of the LFV processes are calculated to leading order (one-loop level). Comparison with current experimental constraints show that there is some tension and, in order to be within the limits, one requires a higher breaking scale f, alignment of the heavy and light lepton sectors or almost degenerate heavy lepton masses. These constraints are more demanding in the SLH than in the LHT case.
Illana Jose Ignacio
Jenkins Mark D.
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