22-29 July 2015
Europe/Vienna timezone

KL --> pi0 nu nu(bar) Beyond the Grossman-Nir Bound

Jul 24, 2015, 11:50 AM
15m
HS21

HS21

talk Flavour Physics and Fundamental Symmetries Flavour Physics and Fundamental Symmetries

Speaker

Prof. George W.S. Hou (National Taiwan University)

Description

We do not violate the Grossman-Nir (GN) bound per se, but point out that the commonly perceived current GN bound of B(KL --> pi0 nu nu(bar)) < 1.4 x 10^-9 can be evaded, if a weakly interacting narrow state falls into the windows of kinematic exclusion of the K+ --> pi+ nu nu(bar) experiments. An explicit example is a Z' boson motivated by the muon g-2 anomaly and linked with flavor physics. The model has implications for K+ --> pi+ mu+ mu-, B --> K+ mu+ mu-, K(*) nu nu(bar) studies, the LBNE and Muon g-2 experiments, and possibly even LHC collider physics. But the main point is that the KOTO experiment is already breaking New Physics ground in their search for KL --> pi0 nu nu(bar).

additional information

Talk based on arXiv:1412.4397 [hep-ph], which just appeared in Phys. Rev. Lett.

Primary author

Prof. George W.S. Hou (National Taiwan University)

Presentation materials