### Oscillations of Mossbauer neutrinos

Mossbauer neutrinos can oscillate. After giving quantum mechanical arguments to support this statement, we will compute the oscillation probability of Mossbauer neutrinos, including localization and decoherence terms, in a

quantum mechanical wave packet model. We will then proceed to the calculation of the combined rate of Mossbauer neutrino emission, propagation and absorption in the framework of quantum field theory. This approach allows us to avoid making any a priori assumptions on the neutrino wave function, and it can easily describe the various effects that broaden the neutrino emission and absorption lines. Finally, we will also address the unrealistic, but theoretically extremely interesting, case of Mossbauer neutrinos affected only by natural line broadening and not by solid state effects.

### Non-standard neutrino interactions — future bounds and models

### Sneutrino LSPs in R-parity violating mSUGRA Models and feasibility study at the LHC

particle (LSP) in a large region of mSUGRA parameter space. We consider the constraints from neutrino masses, the muon anomalous magnetic moment, “b -> s \gamma” and other precision measurements. We then give examples for

characteristic signatures at hadron colliders. Furthermore, we present the prospects for probing this scenario from the decay of lighter top squark at the LHC.

### Growth of cosmological magnetic fields

### Multiwavelength constraints on e+e- excess from Dark Matter annihilations

### Bimaximal Neutrino Mixing and Weak Complementarity with S4 Discrete Symmetry

a situation where Bimaximal mixing is valid in first approximation and it is

then corrected by terms of order of the Cabibbo angle, arising from the

diagonalization of the charged lepton masses, we construct a model based on

the discrete group S4 where these properties are naturally realized. The model

is supersymmetric in 4-dimensions and the complete flavour group is S4 x Z4 x

U(1)_FN, which also allows to reproduce the hierarchy of the charged lepton

spectrum. The only fine tuning needed in the model is to reproduce the small

observed value of r, the ratio between the neutrino mass squared differences.

Once the relevant parameters are set to accommodate r then the spectrum of

light neutrinos shows a moderate normal hierarchy and is compatible, within

large ambiguities, with the constraints from leptogenesis as an explanation of

the baryon asymmetry in the Universe.

### Magnetic field in early galaxies

### How to determine the SUSY CP phases?

### Tri-bi-maximal mixing and the seesaw mechanism: Strong Hierarchy or Quasi-Degeneracy?

In this talk I discuss two possibilities that can explain the disparity between quark and lepton mixing:

In Sequential Dominance, strongly hierarchical right-handed neutrinos strongly affect the neutrino mixing angles through the see-saw mechanism, leading characteristically to a strong hierarchy of the effective neutrino masses.

### SO(10) vs flavor symmetries:possible strategies to describe fermion mixings and mass hierarchies

trying to build an SO(10) GUT model combined with a Flavour

Symmetry (FS) are discussed. Two possible realizations SO(10) x FS

are then presented, based on two different FSs, A4 and Delta27

respectively. The two models realize at leading order tri-bi

maximal mixing in the lepton sector and correctly reproduce the

CKM and all the fermion mass hierarchies.

### Non-standard neutrino interactions from low-scale seesaw models

### Exclusion of black hole disaster scenarios at the LHC

will start to operate in an energy region which has

never been reached by a man made machine.

This outstanding scientific effort is accompanied

by great fears in the public that possibly produced

mini black holes might destroy the earth.

In this talk the scientific background for the conjectured

mini black holes will be explained and

it will be shown why there is no reason for such fears whatsoever.

### Intermediate mass scales in the non-supersymmetric SO(10) grand uniﬁcation: a reappraisal

### Type-III Seesaw with 2HDM

### Constraints on Dark Matter large annihilation cross-section from the early Universe

### Cosmic-ray signatures of dark matter decay

### Cosmological Signatures of the Interacting Dark-Energy with Massive Neutrinos

quintessence scalar field is the

origin of the late time accelerated expansion of the universe. We

present cosmological perturbation

theory in neutrinos probe interacting dark-energy models, and

calculate cosmic microwave background

anisotropies and matter power spectrum. In these models, the evolution

of the mass of

neutrinos is determined by the quintessence scalar field, which is

responsible for the cosmic acceleration

today. We consider several types of scalar field potentials and put

constraints on the coupling

parameter between neutrinos and dark energy. Assuming the flatness of

the universe, the constraint

we can derive from the current observation is Pm < 0.87eV at the 95 % confidence level for the sum over three species of neutrinos. We also discuss on the stability issue of the our model and on the impact of the scattering term in Boltzmann equation from the mass-varying neutrinos.

### Quark-lepton complementarity in a PS x S4 scenario

### Prospects for observing CP violating Higgs at Tevatron and LHC

for the light flavor jets. We explicitly considered all possible Standard Model backgrounds. We found that it is very hard to observe this signature in the LEP-allowed region of parameter space, even though the backgrounds are

manageable, due to the small signal efficiency at Tevatron. By applying judiciously kinematical selections, we suppressed huge backgrounds and left with a few ten signal events at LHC. Requiring $m_{h_2} \lsim 140$ GeV leads the total background comparable to signal. Moreover, the Higgs signal at LHC might be show up in the vicinity of present LEP exclusion.

### Collider and Flavor Phenomenology in the Scalar sector of Warped Extra Dimensions

phenomenology of the two (presumably) lightest scalars in the context of

warped extra dimensions: the Higgs and the radion. This last one, could

be the lightest “new physics” state to be discovered at the LHC in this

type of models. Its phenomenology is very similar to the Standard Model

(SM) Higgs. When SM fields are allowed to live in the bulk of the extra

dimension, new interesting effects appear in the scalar sector of the

model. In particular, both the Higgs and the radion can now typically

mediate Flavor Changing Neutral Currents at tree level. These will

impose bounds on the flavor structure of the model, but also allow for

interesting probes in current and future collider experiments.

### Neutrino experiments and nonstandard interactions

neutrino mass pattern observed in recent experiments. Most of these

models imply nonstandard interactions that can be parametrized in

terms of effective four-fermion operators in the low-energy limit. In

this talk I will show the status of some of the constraints to these

parameters obtained from different neutrino experiments data. I will

also discuss the perspectives of some experimental proposals to

improve these bounds.

### Sneutrino dark matter in the NMSSM

sneutrino and its

viability as a WIMP dark matter candidate in

the Next-to-MSSM with an extra singlet superfield, included in order

to provide non-vanishing neutrino masses. I

will explain the conditions under which the

right-handed sneutrino has the correct relic abundance and the

dominant annihilation channels. The theoretical

predictions for the sneutrino-proton elastic scattering cross section

will be preesnted

and compared it with present and future experimental sensitivities.

I will show how sneutrinos with a mass in the range of 5-200 GeV can

reproduce the observed dark matter relic density without being

excluded by direct dark matter searches and for natural values of the

input parameters. Interestingly, the predicted scattering cross

section is generally within the reach of future experiments.

### Neutrino oscillations in matter with varying density

### Discrete symmetries and neutrinos

### Leptogenesis in an A4 model

Universe is generated through the leptogenesis mechanism in a specific A4 model where the neutrino masses

are generated by a combination of the type-I and type-II seesaw mechanisms. One of the key ingredients of this model is therefore the existence of a Higgs boson triplet. The Boltzmann set of equations was numerically solved and we found a large region of parameter space where we can achieve the observed baryon asymmetry, while at the same time satisfying the present neutrino data (work in progress.)

### Indirect detection of dark matter

### Inflation in Supergravity

### Minimal Supersymmetric Inverse Seesaw

### Cosmic rays positrons and electron from supernova remnants and dark matter annihilation

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