Ettore Majorana, its neutrino legacy and beyond: a genius at work
Geo-particle physics: High energy cosmic rays to probe geological structures
Probing massive neutrino physics at accelerators
Probing Non-standard Interactions of Neutrinos with Matter
by Future Long Baseline Experiments
the potential of superbeam experiment with Kamioka-Korea 2
detector system and then I move to the main focus of this talk, the potential of neutrino factories with 2 detector systems one at 3000 km and the other at 7000 km. We show that such 2 detector system can allow us to probe NSI without spoiling much the sensitivity to the determination of the standard mixing parameters.
21 cm in (a bit more than) a week
Sneutrino cold dark matter in extended MSSM models
in different classes of supersymmetric models, as is typically done for
the neutralino dark matter. First in the Minimal Supersymmetric Standard
Model, sneutrinos are marginally compatible
with existing experimental bounds, including direct detection, provided
they compose a
subdominant component of dark matter. Then supersymmetric models
with the inclusion of right-handed fields and lepton-number violating
terms are presented. Simple versions of the lepton-number-violating models
do not lead
to phenomenology different from the standard case when the neutrino mass
bounds
are properly included. On the contrary, models with right-handed fields
are perfectly viable: they
predict sneutrinos which are compatible with the current direct
detection sensitivities. I am going to show the
indirect
detection signals for such successful models: predictions for antimatter
and neutrino fluxes are provided and compared with existing and future
experimental sensitivities.
Informal Journal Club Neutrinos in A4 models
A multi-messenger approach to ultra-high energy cosmic ray sources
unveil the origin of ultra high energy cosmic rays (UHECRs). With
this respect the recently announced evidence of a correlation between the
arrival direction of UHECRs and nearby active galactic nuclei (AGN) by
the Pierre Auger Observatory (PAO) has implied a major step forward.
Nevertheless, the scarce number of events and the fact that UHECRs are
deflected by magnetic fields make it still difficult to use them to
identify individual sources.
In this talk I will summarize the importance of a multi-messenger
approach to overcome this problem, that is, the essential role that
the observation of gamma rays and neutrinos can play in understanding
where and how UHECRs are produced. For a successful "multi-messenger
astronomy" it is though crucial to know the connection between the
fluxes of UHECRs, gamma rays and neutrinos emitted by the source. As
an example I will discuss the case of astrophysical thick sources,
focusing on the interplay between the UHECRs and the neutrino fluxes.
Probing a Supersymmetric Model for Neutrino Masses at Ultrahigh Energy Neutrino Telescopes.
Sterile neutrino dark matter with gauged U(1)_(B-L)
as dark matter by a low scale gauged U(1)_{B-L}, because
the minimal production mechanism by the neutrino oscillation was
turned out not to be sufficient. As an application of this model,
511 keV gamma line emissions from galactic bulge,
so-called INTEGRAL anomaly, can be explained by its decay.
Lepton asymmetries and the growth of cosmological seed magnetic fields
Soft Slepton Masses and A-terms from Discrete Lepton Flavor Symmetry
$D_4\times Z_2$ lepton flavor symmetry.
The condition to realize the tri-bimaximal mixing is presented.
We evaluate soft supersymmetry breaking terms, i.e.
soft slepton masses and A-terms, which are predicted in this flavor model.
We consider constraints due to experiments of flavor changing
neutral current processes.
We also discuss the soft slepton masses and A-terms
and FCNC in $A_4$ models.
Discrete Symmetries and LFV
possible exstentions to the quark sector and the solution to the vacuum
alignment problem. In the second part, I will show the predictions of the
model for some LFV transitions, EDMs and MDMs. The analysis has been done in
two different scenarions: in the first one a low-energy operatorial approach
is used, where all the effects are dominated by dimension six operators; in
the second one an exact calculation of the relevant diagrammatics has been
done in a SUSY context. Interesting indications for the scale of new physics
and an upper limit on the leptonic \theta_13 of a few percent are concluded.
Gravitino Dark Matter with broken a R-Parity
lightest supersymmetric particle (LSP) and therefore a dark matter
candidate, but for Gravitinos with masses in the keV range the relic
density would be too high. This relic density could be reduced by the
entropy production of the late time decays of messenger and SUSY
particles.
Cosmic Neutrino Background: properties and detection perspectives
of the properties of the relic neutrino background and of experimental
challenges for its direct detection.
Cosmology and the Cosmic Microwave Background
Solar occultations of energetic gamma-ray sources: from EGRET to GLAST
Cosmology and the Cosmic Microwave Background
Signals of a SUSY Warped Higgsless Model at the LHC
difference between the TeV scale and much higher scales like the quantum gravityscale. Last but not least it cannot describe cold dark matter (CDM), which constitutes 20% of the energy density of the universe. Thus we examine a warped
extra dimensional higgsless supersymmetric extension of the SM which allows EWSBvia boundary conditions, gives a natural explanation for the huge scalegive a short introduction to flat and warped extra dimensions and explain how toconstruct supersymmetric theories in extra dimensions. Afterwards I will outlinethe model, discuss the Feynman rules and at the end present possible characteristic signals of the model at the LHC.
The GSI time anomaly: facts and fiction
It is shown that the interpretations in terms of
neutrino mixing appeared in the literature are faulty.
With the help of an analogy with a double-slit
experiment, it is shown that the standard method of
calculation of the rate of an interaction process by
adding the rates of production of all the allowed
final states, regardless of a possible coherence among
them, is correct.
It is a consequence of causality.
It is shown that the GSI time anomaly may be due to
quantum beats due to the existence of two coherent
energy levels of the decaying ion with an extremely
small energy splitting (about 10^{-15} eV) and
relative probabilities having a ratio of about 1/99
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See also the IFIC - CSIC/UVEG seminar list