Speaker
Ms
Stefania Gori
(Technische Universität München)
Description
We present a particular warped extra-dimensional model (WED), where the flavour diagonal and flavour non-diagonal $Z$ boson couplings to left-handed down quarks are protected by the custodial symmetry $P_{L,R}$.
After the introduction of the model, we present a complete study of rare $K$ and $B$ meson decays, including $K^+\to \pi^+\nu\bar\nu$, $K_L\to\pi^0\nu\bar\nu$, $K_L\to\pi^0 l^+l^-$,
$K_L\to \mu^+\mu^-$, $B_{s,d}\to \mu^+\mu^-$ and
$B_{s,d}\to X_{s,d}\nu\bar\nu$. In particular we restrict the parameter space of our theory to the subspace which fits all quark masses, mixing angles and $\Delta F=2$ observables, such as $\epsilon_K$, keeping the Kaluza-Klein scale in reach of the LHC ($\sim(2-3)TeV$) (see also talk by B. Duling). There we show that, in addition to the one loop contribution of the Standard Model, the dominating contribution to the rare decays of $K$ and $B_{s,d}$ mesons is the tree level exchange of the KK new heavy electroweak gauge bosons $Z_H$ and $Z^\prime$. We identify several correlations not only between the various $\Delta F=1$ observables, but also between $\Delta F=1$ and $\Delta F=2$ observables. Both observables can differ significantly from what predicted by the Standard Model.
Author
Ms
Stefania Gori
(Technische Universität München)
Co-authors
Dr
Andreas Weiler
(Cornell University, Ithaca)
Prof.
Andrzej Buras
(Technische Universität, Munich)
Mr
Björn Duling
(Technische Universität, Munich)
Ms
Monika Blanke
(Technische Universität, Munich)