專題演講 Seminar

2017/12/27(Wed)     11:00 -12:30    七樓研討室 7F, P7F Seminar Room

Title

Vectorlike confinement addresses R_K(*) flavor anomalies and more

Speaker

Dr. Kenji Nishiwaki (Korea Institute for Advanced Study)

Abstract

Anomalies suggesting lepton flavor violation have been reported as
deviations in the ratios, namely, R_K and R_K(*). Results of global
fits of associated data tell us that a new Z'-like vector boson which
couples with corresponding left-handed components of quarks and
leptons is a good candidate for explanation. On the other hand,
consistency in gauge anomaly cancellation puts a restriction on the
choice of U(1)' quantum number. In this talk, we focus on the scenario
where vector-boson candidates are naturally realized as `vector-rho
mesons' of a hidden strongly-coupled vector-like gauge theory, where
the theory is manifestly anomaly-free and the vector particles can
contain couplings with the SM fermions in a gauge-invariant way, in
the language of hidden-local symmetry. We found parameter spaces where
the deviation in R_K and R_K(*) is explained by new physics effects
consistently [based on arXiv:1706.01463].
We also introduce other fascinating aspects of this scenario, e.g.,
addressing the deviation of epsilon'/epsilon and the spontaneous scale
generation in the classically scale in- variant Higgs sector triggered
by the hidden confining gauge interaction [based on ongoing works].

Language

演講語言 (Language): in English