Time dependent CP-violation phenomena are a powerful tool to precisely measure fundamental parameters of the Standard Model and search for New Physics. The Belle II experiment is a substantial upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric $e^+ e^-$ collider. The accelerator has already successfully completed the first phase of commissioning and first...
We analyze the factorization to subleading power in the flavor changing neutral current processes $\bar B\rightarrow X_{s} \ell^+ \ell^-$ and $\bar B\rightarrow X_{d} \ell^+ \ell^-$. In particular, we compute the so-called resolved contributions and explore the numerical impact on observables. In these contributions the virtual photon couples to light partons instead of connecting directly to...
Lepton flavor violation (LVF) is a striking signature of potential beyond the Standard Model physics. The search for LFV with the ATLAS detector is reported in searches focusing on the decay of the Higgs boson, the Z boson and of a heavy neutral gauge boson, Z', using pp collisions data with a center of mass energy of 8 TeV and 13 TeV.
We develop a 3-3-1 model with new charged leptons where the cancellation
of gauge anomalies fixes the number of fermion generations. Symmetry
breaking is achieved effectively with two scalar triplets so that the
scalar spectrum at the TeV scale contains just a charged and two CP even
scalars. Such a scalar sector is simpler than the one in the Two Higgs
Doublet Model, hence more attractive for...
I discuss examples of correlations of leptonic CP phases at low and high energies and of CP phases in the lepton and in the quark sector that are achieved with the help of flavour and CP symmetries.
We discuss the correlation between the CP violating Dirac phase and the baryon asymmetry of the universe based on the leptogenesis in the minimal seesaw model.
In our model, we introduce two right-handed Majorana neutrinos and consider the trimaximal mixing matrix in the neutrino flavors. Because there is only one phase parameter in our model, the sign of the CP violating Dirac phase at low...
The recent data of both T2K and NOνA indicate the atmospheric neutrino mixing angle θ23 to be near the maximal angle 45◦. The closer the observed θ23 is to the maximal mixing, the more likely some flavor symmetry behind it. In order to confirm the flavor symmetry, it is advantageous to consider the minimum number of parameters needed for reproducing the neutrino mixing angles and CP violating...
We consider the $A_4$, $S_4$ and $A_5$
discrete lepton flavour symmetries
in the case of 3-neutrino mixing,
broken down to non-trivial residual symmetries in
the charged lepton and neutrino sectors in such a way that
at least one of them is a $Z_2$.
Such symmetry breaking patterns lead to predictions
for some of the three neutrino mixing angles and/or
the leptonic Dirac CP violation phase...
We study the lepton flavor models, whose flavor symmetries are finite
subgroups of the modular group such as S3 and A4.
In our models, couplings are also non-trivial representations of these
groups and modular functions of the modulus.
We study the possibilities that these models realize realistic values of
neutrino masses and lepton mixing angles.
This talk is based on our paper...
