Wuppertal 2015 – scientific programme
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T: Fachverband Teilchenphysik
T 90: Seltene Zerfälle II
T 90.1: Talk
Thursday, March 12, 2015, 16:45–17:00, L.09.21 (HS 13)
Full Angular Analysis of polarized τ → 3 µ Decays — •Robin Brüser1, Sven Faller1, Thorsten Feldmann1, Björn O. Lange1, Thomas Mannel1, and Sascha Turczyk2 — 1Theoretische Elementarteilchenphysik, Naturwissenschaftlich-technische Fakultät, Universität Siegen, 57068 Siegen, Germany — 2PRISMA Cluster of Excellence & Mainz Institut for Theoretical Physics, Johannes Gutenberg University, 55099 Mainz, Germany
The lepton number violating decay τ → 3 µ is extremely suppressed in the Standard Model and its observation would be direct evidence of New Physics. We investigate the decay of polarized τ leptons in a bottom-up approach using dim 6 operators which respect the symmetries of the Standard Model. We show that useful information can be gained from a polarized initial τ, where the external polarization vector allows for a full angular decomposition of the phase space. Partial rates are then analysed to distinguish models with different helicity structures.