mercoledì 14 giugno 2017

# s-phys: beyond the Standard Model, a hypothesis

<< A fundamental assumption of the Standard Model is that the interactions of these elementary particles [ leptons: electrons, muons and taus ] are the same despite their different masses and lifetimes >>

<< A new review of results from three experiments points to the strong possibility that lepton universality — and perhaps ultimately the Standard Model itself — may have to be revised >>

<< The rates for some decays involving the heavy lepton tau, relative to those involving the light leptons — electrons or muons — were higher than the Standard Model predictions >>

Julie Cohen. Not So Elementary. June 8, 2017

Gregory Ciezarek, Manuel Franco Sevilla, et al. A challenge to lepton universality in B-meson decays.     Nature 546, 227–233 (08 June 2017) doi: 10.1038/nature22346
Publ. 07 June 2017

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