SUSY Breaking on the Pillow – Gaugino Mediation and Gravitino Dark Matter in an SO(10) Orbifold GUT
Dr. Joern Kersten
DESY
Sala de Juntas IFIC
Tuesday, January 10th, 2006 at 15:00
Abstract
Bi-large neutrino mixing and fermion mass hierarchies in nuMSSM and Beyond
Zurab Tavartkiladze
CERN
Sala Seminarios IFIC
Monday, January 16th, 2006 at 12:00
Abstract
After brief introduction I will discuss the neutrino puzzles and problem of fermion flavor within \\\\nuMSSM and beyond. The simple textures for neutrino mass matrix, which give prediction for third leptonic mixing angle, will be presented. Then the main ingredients needed for generation of suggested textures will be outlined. Finally, realization of presented ideas will be discussed on example of supersymmetric SO(10) Grand Unified model. The latter, supplemented by Abelian flavor symmetry, provides a simple understanding of the observed hierarchies in the charged fermion sector including CKM mixings. In the neutrino sector bi-large mixing can be realized, while the third leptonic mixing angle is in a range 0.01-0.2.
Searching visible and invisible Higgs Bosons at the LHC
Dr. Michael Duehrssen
U. Freiburg
Sala Juntas IFIC (Edf. Institutos Paterna)
Tuesday, May 9th, 2006 at 12:00
Abstract
This talk will cover a general introduction into Higgs Boson physics
at the LHC and give a short overview of the methods for discovering a standard
model Higgs Boson and measuring its properties. After this the talk will focus
on the problem of finding invisible decaying Higgs Bosons at the LHC and the
experimentel challenges in understanding the backgrounds involved in these
studies.
Proposal for a New Supersymmetric Standard Model
Prof. Carlos Muñoz
Universidad Autonoma de Madrid
Sala Seminarios IFIC
Wednesday, June 7th, 2006 at 12:00
Abstract
Although supersymmetry is thirty five years old, still is one of the most attractive theories for physics beyond the standard model. Assuming that it will be discover at the LHC, the question is: What susy model do we expect to be right one ? After reviewing briefly several models that have been proposed in the literature, such as the MSSM, NMSSM, BRpV, etc., we will propose a new one. Its interest resides in the fact that it introduces a solution to the (famous) $\mu$ problem of susy models that is connected to the (nowadays very popular) neutrino physics.
CP violation in chargino/neutralino production
with transverse beam polarization
Dr. Karl Hohenwarter-Sodek
U. Vienna
Sala Juntas IFIC (Edf. Institutos Paterna)
Thursday, March 30th, 2006 at 11:00
Abstract
At an e+e- linear collider the beams can be arbitrarily polarized.
The potential of transverse beam polarization for measuring
CP sensitive observables in chargino/neutralino
production is studied.
Dark energy: the current status
Dr. Eugeny Babichev
Max-Planck-Institut für Physik, Munich
Seminari del IFIC
Tuesday, April 25th, 2006 at 12:00
Abstract
The astronomical observations indicate that the expansion of our Universe accelerates. To fit observations, one has to admit that about two thirds of the total energy density of the Universe consist of dark energy: the still unknown component with a negative pressure. I will review the approaches that are currently adopted for the explanation of
the acceleration of our Universe. Starting from the basics of cosmology I will briefly touch upon the observational evidence for dark energy. The important part of a talk is devoted to a number of scalar field models of dark energy such as quintessence, k-essence, tachyon, phantom and ghost
condensate. Other alternatives to dark energy (e.g. modified gravity) will also be discussed.
Dark energy in generalized theories of gravity
Dr Valeria Pettorino
INFN – Torino
Sala de Juntas del IFIC
Wednesday, January 18th, 2006 at 15:00
Abstract
Lepton Family Symmetries for Neutrino Masses and Mixing
Prof Ernest Ma
U California at Riverside
Sala de Juntas del IFIC
Friday, January 20th, 2006 at 16:00
Abstract
Constraining neutrino physics with cosmological observations
Dr Massimiliano Lattanzi
International Center for Relativistic Astrophysics
Seminari del IFIC
Friday, January 27th, 2006 at 12:00
Abstract
According to the standard model of cosmology, a thermal background of relic neutrinos at T=1.9 K fills up the present Universe, in a similar way as the photons of the cosmic microwave background radiation do. The presence and the properties of this neutrino background affect the cosmological evolution; this means in turn that cosmological observations can be used to indirectly measure their properties. In particular, we can obtain informations about the neutrino mass and about non-standard features, such as the presence of large cosmological lepton asymmetry.
Orbifold models with three Higgs families: phenomenological viability
Dr Ana M. Teixeira
Universidad Autonoma de Madrid
Sala Seminarios IFIC
Tuesday, January 31st, 2006 at 12:00
Abstract
We discuss the phenomenological viability of string multi-Higgs doublet models, namely a scenario of heterotic $Z_3$ orbifolds with two Wilson lines, which naturally predicts three supersymmetric families of matter and Higgs fields. We study the orbifold parameter space, and discuss the compatibility of the predicted Yukawa couplings with current experimental data. We address the implications of tree-level flavour changing neutral processes in constraining the Higgs sector of the model, finding that viable scenarios can be obtained for a reasonably light Higgs spectrum. We also take into account the tree-level contributions to indirect CP violation, showing that the experimental value of $\\\\varepsilon_K$ can be accommodated in the present framework.
Determining Neutrino Mass Hierarchy: With and Without Matter Effect
Dr. Hiroshi Nunokawa
PUC Rio de Janeiro
Sala de Juntas del IFIC
Monday, February 20th, 2006 at 12:30
Abstract
Flavor Effects Leptogenesis
Dr. Nardi Enrico
INFN-Frascati & Universidad de Antioquia
Seminari del IFIC
Wednesday, February 22nd, 2006 at 12:30
Abstract
If leptogenesis occurs in the medium (low) temperature regime $T\lsim 10^{12}$ GeV ($\lsim 10^{9}\,$ GeV) where the rates of processes mediated by the $\tau$ (and $\mu$) Yukawa coupling are non negligible, lepton flavors dynamics can have surprising effects on the generation of cosmic asymmetries: (i) The baryon asymmetry can be enhanced by up to one order of magnitude; (ii) The sign of the asymmetry can be opposite to what one would predict from the sign of the total lepton asymmetry $\epsilon_1$; (iii) Successful leptogenesis is possible even when the total lepton asymmetry in the heavy neutrinos decays vanishes ($\epsilon_1=0$). We discuss these effects, and we also comment on additional corrections from Higgs effects and sphalerons processes.
Phenomenological Aspects of Supernova Neutrinos
Dr. Ricard Tomàs
IFIC
Seminari del IFIC
Wednesday, March 1st, 2006 at 12:00
Abstract
Core-collapse Supernovae (SNe) are one of the most energetic explosive events known. These occur at the end of a massive ($M \gtrsim 8 M_\odot$) star’s lifetime, and implies an energy release of the order of $O(10^{53})~erg$. From a particle physics point of view neutrinos turn out to be essential in such events. First they are thought to play a key role during the explosion phase and in the posterior cooling and deleptonization of the star. On the other hand they are responsible to carry away around $99\%$ of the total energy emitted. Therefore these neutrinos could be easily detected in the case of a nearby supernova in the existent or planned neutrino detectors, what could provide a lot of information about both neutrino properties and the supernova itself. In this talk I will give an overview on the phenomenology involving these neutrinos. I will review the main features of the neutrino spectra and their propagation through the SN envelope, as well as the current related uncertainties. Then I will describe the expected signal in the case of a future galactic SN, and its implications in the determination of neutrino properties and SN physics.
Lepton flavour violation in supersymmetric models
Dr. Werner Porod
IFIC
Seminari del IFIC
Wednesday, May 10th, 2006 at 12:00
Abstract
There are several possibilities to account for the observed neutrino data in supersymmetric models. Often these models have much more parameters than there are observables in the neutrino sector and the quest arises to find further observables. I will discuss two scenarios where information can be obtained at future high energy collider experiments, e.g. the LHC or a future international linear collider. The first one is the general MSSM with conserved R-parity. Particular emphasis will be put on the question on how lepton number violation affects the analysis of lepton number conserving observables at the LHC. The second one is the MSSM with bilinear terms breaking lepton number and, thus, R-parity. Here the focus will be on: (i) generic predictions for the decay properties of the lightest supersymmetric particle in terms of neutrino mixing angles. (ii) Collider signals of gravitino Dark Matter.
Phenomenology of supersymmetric TeV scale seesaw model
Dr Satoru Kaneko
Ochanomizu Univ.
Sala Juntas IFIC (Edf. Institutos Paterna)
Wednesday, June 14th, 2006 at 12:00
Abstract
The supersymmetric standard model with TeV scale right-handed (s)neutrino masses is considered. This model can naturally explain the smallness of neutrino masses via the soft SUSY breaking terms.
The important consequence of the model is unsuppressed sneutrino tri-linear coupling.
We discuss the implications of it to the upper bound of the lightest Higgs boson mass and also the charged Higgs boson decay process, respectively. We also discuss how to test the model in the future linear collider experiment.
Leptonic Charged Higgs Decays in the Zee Model
Dr Diego Restrepo
U Antioquia
Sala Juntas IFIC (Edf. Institutos Paterna)
Tuesday, June 27th, 2006 at 12:00
Abstract
Extending the Type-III Two-Higgs Doublet Model (2HDM) with a charged
SU(2) singlet scalar is a straightforward way to obtain small neutrino
masses. Within this framework we study charged Higgs decays. We focus on
a model with minimal number of parameters consistent with experimental
neutrino data. Using constraints from neutrino physics we show that the
decay rate of the lightest charged Higgs into muon neutrino, in general
is enhanced over the decay into tau neutrino. In some regions of
parameter space the charged Higgs decay into muon neutrino is the
dominant leptonic channel.
Dynamical Dark Energy
Dr. Massimo Pietroni
Sala Seminarios IFIC (Edf. Institutos Paterna)
Wednesday, May 17th, 2006 at 12:00
Abstract
I will review the possibility that the Dark Energy of the Universe is NOT a cosmological constant. After discussing the constraints on the equation of state after the latest SDSS and WMAP, I will focus on Scalar Tensor Gravity as a framework for accommodating a dynamical form of Dark Energy. Even after imposing the strong constraints on solar system tests of gravity, CMB and nucleosynthesis, strong deviations from standard cosmology are still possible in these theories. Among the possible signatures, I will discuss the modifications of the relic abundance of dark matter particles, which might have a deep impact on direct and indirect searches.
Unravelling the spin of the gluino at the LHC
Prof. Oscar Eboli
Instituto de Fisica, Universidade de Sao Paulo
Sala Juntas IFIC (Edf. Institutos Paterna)
Thursday, June 8th, 2006 at 12:00
Abstract
For a long time it has been known that the like–sign dilepton
signature can help establish the existence of a gluino at the LHC.
To unambiguously claim that we see a strongly interacting Majorana
fermion — which we could call a gluino — we need to prove that
the particle responsible for the like-sign dilepton events is a
fermion. Using only angular correlations in the same gluino decay
cascade which is used to measure its mass, we show how to
distinguish a universal extra dimensional interpretation with a
bosonic heavy gluon from supersymmetry with a fermionic gluino.
Kinetic Brane Terms and Gauge Higgs Unification
Dr. Lorenzo Diaz Cruz
U Puebla
Sala Seminarios IFIC (Edf. Institutos Paterna)
Tuesday, September 19th, 2006 at 12:00
Abstract
In this talk we discuss the possibility to construct a model
of Gauge-Higgs unification in 6-dimensions, based on the gauge group
SU(3), which is known to predict a wrong Weinberg angle.
In order to construct a realistic model we include the effect of the
so-called Kinetic gauge terms, which allow to correct such angle.
At the same time, these terms change the predictions for the Higgs
boson mass, which nevertheless remmain in the range allowed by
electroweak precision measurements.
If you wish to give a AHEP seminar please, fill in this
form
See also the IFIC – CSIC/UVEG
seminar list
