2012/12/31 by Ken Kiers, Kiers, Ken
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Radioactive Decay and Measurement Techniques
paper · pdf · doi:10.48550/arxiv.1212.6921
openalex publication_date 2012/12/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider CP-violating effects in tau -> 3 pi nu_ tau and 4 pi nu_ tau (Delta S = 0), and tau -> K pi pi nutau (Delta S = 1), assuming that the usual Standard Model amplitudes for these processes interfere with analogous amplitudes mediated by a charged Higgs boson. In the Delta S = 0 case we focus specifically on the intermediate resonant processes tau -> V pi nutau (with V=omega, rho, and a1), and consider three CP-odd observables -- the partial rate asymmetry, a polarization-dependent asymmetry and a triple-product asymmetry. In the Delta S = 1 case we examine the partial rate asymmetry, two "modified" rate asymmetries, and a triple-product asymmetry. The partial rate asymmetry is expected to be small for both the Delta S = 0 and Delta S = 1 cases. Evaluation of the other asymmetries indicates that they could potentially be measurable.