After a brief introduction to CP violation in the MSSM, we discuss how to probe the
CP-violating mixing in the neutral Higgs-boson sector at the LHC. We observe that
there is an interesting possibility to have the lightest relic neutralino as light as 2.9 GeV.
Leptogenesis via right-handed neutrino decays
is a successful mechanism to explain the matter-antimatter
asymmetry of the Universe. I will discuss some recent
developments, in particular flavour and memory effects.
We find that there is no supersymmetric flavor/CP problem, mu-problem, cosmological moduli/gravitino problem or dimension four/five proton decay problem in a class of supersymmetric theories with O(1) GeV gravitino mass. The cosmic abundance of the non-thermally produced gravitinos naturally explains the dark matter component of the universe. A mild hierarchy between the mass scale of supersymmetric particles and electroweak scale is predicted, consistent with the null result of a search for the Higgs boson at the LEP-II experiments. We propose a parametrization of the model for the purpose of collider studies. The scalar tau lepton is the next to lightest supersymmetric particle in a theoretically favored region of the parameter space. The lifetime of the scalar tau is of O(1000) seconds with which it is regarded as a charged stable particle in collider experiments. We discuss characteristic signatures and a strategy for confirmation of this class of theories at the LHC experiments.
What will we learn from the Planck satellite?
The Planck satellite, to be launched in 2008, is designed for
measuring CMB temperature and polarization anisotropies with much
better precision than the -already impressive- WMAP experiment. In
this seminar, I will present the expected sensitivity of Planck to
the parameters describing dark matter, dark energy, inflation, relic
neutrinos, etc., which are also of great interest for particle
physics. I will show how this sensitivity will increase, first, by
performing a weak lensing analysis of the raw temperature map, and
second, by combining Planck data with future large scale structure
We propose a renormalizable (SUSY) grand unified theory
where the neutrino masses are generated through type III
and type I seesaw mechanisms. Several phenomenological
and cosmological aspects of this proposal are discussed.
We discuss the opportunities in our search for `new physics' beyond
the standard model offered by present and future flavour experiments.
We show the interplay and complementarity of collider and flavour physics
by some examples. Within this talk we focus on rare B and kaon decays.
Moreover, we briefly discuss the restrictive role of long-distance
strong interactions in flavour physics and some tools like QCD
factorisation and soft-collinear effective theories (SCET) to handle
coffee & teacommon room
Discussion of DM from models with extra singletscommon room
A key ingredient in assessing whether or not a stable neutralino can explain the observed dark matter of the universe is the mass of the neutralino. For many SUSY decay chains, only mass differences can be well determined by conventional techniques leaving a large uncertainty in the absolute mass scale and therefore in the mass of the LSP neutralino itself. I describe a technique that can determine the neutralino mass to within a GeV or two in one of the standard SUSY decay chain scenarios for which only mass differences are well determined using other techniques.
Dark Matter in the Left-Right Twin Higgs Models
The dark matter candidate in the left-right Twin Higgs models falls in to the category of inert Higgs doublet models. We analysed the dark matter relic density and its direct and indirect detection potential.
Electroweak Baryogenesis, Dark Matter and Supersymmetry
I will review the present status of the analyses of the possibility of implementing the mechanism of generation of the baryon-antibaryon asymmetry at the electroweak scale, in supersymmetric extensions of the Standard Model. I will discuss the interrelation of this mechanism with the origin of dark matter, as well possible tests of these scenarios at the Tevatron and the LHC, as well as in dark matter detection and electric dipole moments experiments.
Probing models of neutrino mass and neutrino interactions with the CMB
Gravitino dark matter at LHC and GLAST
We consider supersymmetric theories where the gravitino is the lightest
superparticle (LSP) and a charged scalar lepton the next-to-lightest
superparticle (NLSP). Such a scenario can lead to spectacular signatures
at the LHC, which we illustrate with several examples. A gravitino LSP
can be the dominant component of dark matter. In the case of small
R-parity breaking, it may first be disovered by GLAST.
The observed properties of dark matter on small astrophysical scales, and the number of small satellites
New dynamical studies and discovery searches for the smallest dark matter dominated
galaxies will be presented. Dark matter in dSph galaxies has a mean volume mass
density within the stellar distribution which always has a very low value of about
5GeV/c^2 cm^-3. The mass profiles appear cored, not cusped as predicted by
Cold DM models. Galaxies are embedded in dark matter halos with these properties;
small systems containing dark matter are not observed.
B physics, direct dark matter detection and SUSY Higgs searches at colliders
I will discuss the connection among Higgs Physics, Flavour Physics and Cosmology in Supersymmetric Models. I will highlight the impact of radiative corrections to the Higgs-fermion couplings which can lead to relevant Flavour concerving and FCNC effects. This will allow me to show the interplay between direct Higgs searches at the Tevatron and the LHC and the impact of present and projected experimental results for rare B decays, which can importantly contrain large regions of Supersymmetric parameter space. Finally, I will consider as well the interplay between Higgs searches at colliders and direct dark matter searches and its role in exploring Supersymetric scenarios.
coffee & teacommon room
SUSY interpretation of the EGRET excess of diffuse Galactic gamma rays and implementation for the LHC
Test of EGRET hypothesis and indirect measurement of relic density at the LHC
New ideas in indirect detection
Non-thermal dark matter production and its cosmological implication
Predictive model for dark matter, dark energy, neutrino masses and leptogenesis at the TeV scale
A graceful exit for old inflation and a possible solution to the hierarchy problem
Dark Matter as a Guide to SUSY at the LHC
If the lightest neutralino is a stable thermal relic from the Big Bang,
thus comprising dark matter (DM) in the Universe, its relic abundance
can be used to severely constrain the parameter space of supersymmetric
models. For instance, in the paradigm mSUGRA model, each DM allowed
region gives rise to distinct signatures for new physics at the LHC.
We explore an array of well-motivated scenarios with non-universal soft terms
--normal scalar mass hierarchy, non-universal Higgs models, mixed wino DM,
bino-wino co-annihilation (BWCA) DM, low M_3 (compressed) SUSY, mixed
higgsino DM, mixed moduli-AMSB DM-- and show that each of these gives rise
to distinct characteristics that ought to be measureable by the Atlas and CMS
experiments starting next year at the LHC.
Cosmology and Particle Physics with Warped Throats
Warped compactifications provide a mechanism for generating a
hierarchy of physical scales. Strongly warped regions (throats) are also
ubiquitous in compactifications with stabilized moduli. In this talk, we
describe some recent attempts to construct string inflationary models using
warped throats, the CMB signatures of these models, and how differences in the
shape of the extra dimensions can show up in the CMB data. We then turn to
discuss the possibility of using the LHC to distinguish different warped extra
The entropic approach to understanding the cosmological constant
It has recently been proposed to replace the anthropic principle with a more
objective criterion: the likelihood of creating observers is proportional to
the amount of entropy production within a causally connected region of the
universe. This "entropic principle" does a better job of predicting the
value of the cosmological constant than does its anthropic predecessor, and
it is falsifiable, through its power to predict other properties of the
universe to which the existence of observers is sensitive. For example,
dark matter should be unstable on cosmological time scales.
SUSY SO(10) and its implications for colliders and cosmology
Part 1: Discussion of recent papers/events ***everybody is invited to contribute***
Part 2: Talk by Tomas Blazek
Growing neutrinos and cosmological selection1-1-025
The time evolution of a cosmological scalar field can be stopped by an increasing mass
of the neutrinos. This leads to a transition from a cosmological scaling solution with
dynamical dark energy at early time to a cosmological constant dominated universe at
late time. The trigger for the transition is set at the time when the neutrinos become non-relativistic.
This is a possible solution of the "why now" problem.
We present a particle physics realization of this "growing matter" scenario. It is based on
the very slowly varying mass of a superheavy scalar triplet field whose expectation value
dominates the light neutrino masses. A simple and realistic dark energy cosmology can be
obtained in this way.