### Neutralino decaying dark matter

different R-parity violating couplings can yield an unstable

neutralino. We show that in this context astrophysical and

cosmological constraints on neutralino decaying dark matter forbid

bilinear R-parity breaking neutralino decays and lead to a class of

purely trilinear R-parity violating scenarios in which the

neutralino is stable on cosmological scales. We have found that

among the resulting models some of them become suitable to explain

the observed anomalies in cosmic-ray electron/positron fluxes.

### Cosmic antimatter: is there room for exotic sources?

cosmic antimatter and of the main experimental results on

positrons and antiprotons in cosmic rays.

The interpretations of the data in terms of astrophysical

sources will be presented, and the possible contribution of dark matter

annihilation in the galactic halo will be inspected.

I will address some perspectives in light of forthcoming space missions and

theoretical advancements.

### Fermion masses and mixing from non-abelian discrete symmetries

non-abelian discrete symmetries work in explaining the experimental

pattern of fermion masses and mixing. In particular, I will analyze the

case of S4, showing that in the neutrino sector this group

helps in reproducing the approximate Tri-Bimaximal mixing structure of the lepton mixing matrix. The extension to the quark sector of the S4 symmetry and its consequences

are also briefly discussed.

### SARAH – A Tool for SUSY Model Builders

### Tri-bimaximal Mixing and Cabibbo Angle in S_4 Flavor Model with SUSY

Taking vacuum alignments of relevant gauge singlet scalars, we predict the quark mixing as well as the tri-bimaximal mixing of neutrino flavors.

Especially, the Cabibbo angle is predicted to be 15 degree in the limit of the vacuum alignment.

Considering the next leading order, we predict the deviation from the tri-bimaximal mixing.

Flavor symmetry also constraints the sleptons structure, then we discuss the FCNC.

### Do cosmological data favor neutrino mass and Dark Energy coupled to Dark Matter?

### Unified Model of Fermion Masses with Wilson Line Flavor Symmetry Breaking

### Neutrino asymmetry and growth of cosmological magnetic fields

### Neutrino propagation with random magnetic fields.

### nonstandard neutrino-quark interactions

### Dynamo in Context of Riemannian Geometry: A Mathematical Tool and Cosmological Applications

### Neutrino masses and mixing and different mass hierarchies in mu-nuSSM

TeV scale seesaw mechanism involving right-handed neutrinos and R-parity violation are together instrumental for the light neutrino mass generation. We show that in mu-nuSSM all three neutrinos acquire massat the tree level consistent with the three flavour global data even with

diagonal neutrino Yukawa couplings. We further show that inclusion of one-loop corrections can alter the tree level neutrino masses and mixing in a significant manner. We find that it is relatively easier to accommodate the normal hierarchical mass pattern compared to the inverted

hierarchical or quasi-degenerate case, with the ingression of one-loop radiative correction. Nice correlation between tree level neutrino mixing angles and ratios of R-parity violating two-body decay branching ratio of the lightest neutralino is a characteristic feature of this model.

These correlations were analyzed for different lightest neutralino composition and different neutrino mass hierarchy and together with the study of displaced vertices these can provide useful experimental

signature of mu-nuSSM at the Large Hadron Collider (LHC).

### Neutrinos at the Terascale – a tale of 3.5 frontiers

-the Majorana frontier

-the Unification frontier

-the Flavor frontier

-the Exotics frontier

### Discrete flavour groups for neutrino mixing

### Fermion masses and mixings in a mu-tau symmetric SO(10)

are considered for fermion masses using both type-I and type-II seesaw mechanism. Small explicit breaking of the $\mu$-$\tau$ symmetry is then shown to provide a very good understanding of all the fermion masses and mixing. One obtains a very good fit to all observables in the context of

the type-I seesaw mechanism but type-II seesaw model also provides a good description except for the overall scale of the neutrino masses. Three major predictions on the leptonic mixing parameters in the type-I seesaw case are (1) the atmospheric mixing angle $\theta_{23}^{l}$ close to

maximal, (2) theta13^{l}$ close to the present upper bound and (3) negative but very small Dirac CP violating phase in the neutrino oscillations.

### The Higgs as a harbinger of flavor symmetry

symmetry which requires three scalar SU(2) doublets. The spectrum is fixed by minimizing the scalar potential, and we observe that the symmetry of the model leads to tantalizing Higgs decay modes potentially observable at the CERN Large

Hadron Collider (LHC).

### Dark matter models with large annihilation cross section

### Hypermagnetic field as a seed of Maxwellian field: magnetic helicity transfer

### Hypermagnetic field as a seed of Maxwellian field: magnetic helicity transfer

is much more restrictive in astrophysical objects than the magnetic field energy conservation. Rotation of galaxies, stars, etc. feeds magnetic field energy (i.e. (B^2/8\pi)\sim amplitude^2 is growing due to dynamo).

Same rotation does not influence helicity at all. Only a small helicity parameter (parity violating in isotropic= not rotating early Universe) provides amplification both energy (amplitude) and magnetic helicity in primordial plasma.

The evolution of the magnetic helicity during the

electroweak phase transition (EWPT) in the early Universe is studied.

It is shown that the boundary surface between symmetric (hypermagnetic)

phase and Maxwellian phase with a broken symmetry is a membrana for

the separation of the magnetic helicity. The hypermagnetic helicity

converts into the magnetic one during EWPT and can be a supply of

galactic magnetic helicity. During short EWPT time the helicity

parameter \alpha plays no role: the bubble expansion of new broken phase

is more important. However, before EWPT the bigger the value

of a lepton (right electron) asymmetry \mu_{eR} the bigger helicity parameter

\alpha\sim \mu_{eR}/T and the effect of hypermagnetic helicity growth.

### The Higgs as a harbinger of flavor symmetry

### Flavour of Grand Unifications – what do neutrinos tell us?

### Flavour of Grand Unifications – what do neutrinos tell us?

### New aspects of symmetry breaking in Grand Unified Theories

concept of minimality itself can be associated to the simplicity of the relevant Higgs sector. I will review some recent results on the Higgs sector of both ordinary and supersymmetric GUTs, focusing first on a class of minimal nonsupersymmetric SO(10) models, fallen into disuse about 30 years ago and now revived by the quantum level analysis, and then on the investigation of the minimal SM-compatible flipped SO(10) and E(6) supersymmetric Higgs models

### Dark Matter candidate from the compactification on a Real Projective Plane

### .

### .

### Discussion of MINOS Results

### Discussion on GLOBES

### If the Higgs mass is .. or what might be known by 2016

have already been presented. After a short overview about these first LHC results, the perspectives for direct Higgs searches using a realistic(?) LHC road map up to early 2016 will be presented.

Assuming a few representative Higgs masses, implications for its discovery and the consequences for todays experimental constraints and the electroweak precision data will be discussed.

### Neutrino mass hierarchy from core-collapse supernovae

If you wish to give a AHEP seminar please, fill in this form

See also the IFIC – CSIC/UVEG seminar list

See also the IFIC – CSIC/UVEG seminar list