I will briefly review the current status of WIMP indirect dark matter detection, identifying recent progresses and the hurdles to overcome in order to improve sensitivity. Particular attention will be paid to the charged cosmic ray channels, although some considerations will also concern other domains, such as gamma rays. I will then discuss how indirect probes also have some chances in...
Theoretical review on the direct detection search for dark matter.
One of the long-standing challenges in indirect dark matter searches is to understand the origin of the pronounced emission of 1-3 GeV photons that is seen in Fermi LAT data in the Galactic bulge and at the Galactic center. The arguably most exciting interpretation is that it is caused by the annihilation of dark matter particles. However, before making such a claim all possible backgrounds...
After a brief review of the standard diffusion approach to the propagation of cosmic rays (CR), I discuss as alternative method the calculation of individual CR trajectories. The results obtained with this approach suggest that CR propagate strongly anisotropic, and that the antimatter fluxes observed are dominated by a single local source. Finally, I discuss
different approaches to predict...
I will give an overview of the current state of dark energy research, from an observational point of view. Current and future probes of dark energy will be discussed; I will examine the latest constraints on dark energy physics from cosmological surveys, and describe future prospects for yet more powerful measurements in the coming decade.
The problem facing us with dark energy has manifested itself through the many theoretical models that have been published, all with the same goal, to explain the late time acceleration of the Universe. I will try and summarise the state of play with the models, recap the original cosmological constant problem which prevents many of us from simply accepting there is a constant energy density...
The Laser Interferometer Gravitational-wave Observatory (LIGO) recently made the first direct detection of gravitational waves; minute distortions in space-time caused by cataclysmic events far away in the universe. I will talk about the source of the signal we detected, the physics behind the detectors, and prospects for the future of this emerging field.
I will focus on the challenge posed by dark energy and discuss theoretical issues involved in finding an optimal framework to unveil its nature from upcoming high precision measurements of the large scale structure, giving an overview of recent progress.
Model-independent methods in cosmology have become an essential tool in order to deal with an increasing number of theoretical alternatives for explaining the late-time acceleration of the Universe. In principle, this provides a way of testing the Cosmological Concordance (or LambdaCDM) model under different assumptions and ruling out whole classes of competing theories. One such...
The ordinary atoms that make up the known universe, from our bodies and the air we breathe to the planets and stars, constitute only 5% of all matter and energy in the cosmos. The remaining 95% is made up of a recipe of 25% dark matter and 70% dark energy, both nonluminous components whose nature remains a mystery. Freese will recount the hunt for dark matter, from the discoveries of visionary...
I will review evidence for dark matter's existence from astronomical observations. I will focus primarily evidence from dwarf galaxies and galaxy clusters, but also discuss results from cosmological observations of the cosmic microwave background and large scale structure.
Although there is substantial gravitational evidence for the existence of dark matter, its particle nature
remains one of the biggest mysteries in modern physics. The favourite theoretical model, Cold Dark Matter
(CDM), assumes that non-gravitational dark matter interactions are irrelevant for galaxy formation and evolution.
Surprisingly, current astronomical observations allow significant...
Dark matter particles may be produced at the LHC in combination with other particles, typically from initial state radiation. We present results from the ATLAS experiment from searches for phenomena with jets, photons, heavy quarks, electroweak gauge bosons, or Higgs bosons recoiling against large missing transverse momentum. The measurements are interpreted using several theoretical...
The existence of dark matter, indicated by astronomical observations, is one of the main proofs of physics beyond the standard model. Despite its abundance, dark matter has not been directly observed yet. This talk reviews the latest results and future plans of searches for dark matter at the CMS experiment at the LHC.
Will discuss issues related to unitarity and gauge invariance of DM interactions, covering both collider searches and indirect detection.
We review model of decaying Dark Matter and other very weakly interacting
DM candidates and present the status of theoretical developments for those
models and DM searches both in indirect detection and at colliders.
High-energy gamma rays are one of the most promising tools to constrain or reveal the nature of Dark Matter (DM), in particular the Weakly Interacting Massive Particles (WIMP) models. During the almost eight years of the Fermi satellite mission, the data from its Large Area Telescope (LAT) were used to set constraints on the WIMP annihilation cross section which cut well into the...
There are several reasons supersymmetric models are appealing as
a candidate for beyond the standard models physics. These include help with
gauge coupling unification, the gauge hierarchy problem, the stabilization of the
electroweak vacuum, radiative electroweak symmetry breaking, dark matter, and perhaps
an improvement to low energy phenomenology.
The lack of evidence for low energy...
The µνSSM solves the µ-problem of SUSY models simply using right-handed neutrinos ν’s, while simultaneously explains the origin of neutrino masses. In this context, novel signatures of SUSY at the LHC are present through the new states of the model. On the other hand, since R parity is broken, a decaying gravitino turns out to be an interesting candidate for dark matter which can be searched...
I review recent progress in the construction of modified gravity models as alternatives to dark energy as well as the development of cosmological tests of gravity. Einstein's theory of General Relativity (GR) has been tested accurately within the local universe i.e. the Solar System, but this leaves the possibility open that it is not a good description of gravity at the largest scales in the...
I will review motivations for the existence of self interacting dark matter and discuss possible astrophysical observables.
Self-interactions of dark matter particles can potentially lead to an observable separation between the dark matter halo
and the stars of a galaxy moving through a region of large dark matter density. Such a separation has recently been
observed in a galaxy falling into...
I will review attempts to address the small-scale problems of Lambda-CDM using a combination of dark matter self-interactions and dark matter interactions with a dark radiation-like species. We will see that most models are rather tightly constrained. New results outlining the role of non-perturbative corrections to these interactions will be presented.
In this talk I will briefly review the tensions and anomalies
in current cosmological data that hint for possible extensions
to the "concordance" LCDM model.
