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Invisibles Workshop 2014 - Paris, France

October 15, 2013 by admin

Mon, 14/07/2014
Mon, 14/07/2014

14-18  Jul 2014. Paris, France
 

Invisibles14 is the third thematic workshop organized in the context of the FP7 funded INVISIBLES ITN (FP7-PEOPLE-2011-ITN, PITN-GA-2011-289442-INVISIBLES), which focuses on Neutrino,  Dark Matter and Dark Energy phenomenology and their connection, and more generally on physics beyond the Standard Model of Particle Physics.

Invisibles School 2014 - Gif-Sur-Yvette, France

October 15, 2013 by admin

Wed, 09/07/2014
Tue, 08/07/2014

8-13 Jul 2014. Gif-Sur-Yvette, France
 

The "Invisibles School 2014" precedes the third thematic workshop organised in the context of the FP7 funded INVISIBLES ITN (FP7-PEOPLE-2011-ITN, PITN-GA-2011-289442-INVISIBLES), which focuses on Neutrino, Dark Matter and Dark Energy phenomenology and their connection, and more in general on physics beyond the Standard Model of Particle Physics. 

Higgs Boson Predictors Awarded the 2013 Nobel Physics Prize

October 10, 2013 by admin

Thu, 10/10/2013
Thu, 10/10/2013

On October 8th the Royal Swedish Academy of Sciences awarded the Nobel Prize in Physics for 2013 to Francois Englert (from the Université Libre de Bruxelles, in Belgium) and to Peter Higgs (from the University of Edinburgh in UK) "for the theoretical discovery of a mechanism that contributes to our understanding of the origin of mass of subatomic particles, and which recently was confirmed through the discovery of the predicted fundamental particle, by the ATLAS and CMS experiments at the CERN Large Hadron Collider (LHC)".

 

Precision measures of the primordial abundance of Deuterium

September 23, 2013 by admin

Interviewee image: 
Introduction: 
During the early phase of the Universe (from three to twenty minutes after the big bang) primordial nucleosynthesis produced the lightest atomic nuclei: deuterium, helium and lithium. Measuring the primordial abundances of these elements provides a window on the early evolution of the Universe and a probe of particle physics (neutrino physics and more) beyond the standard model.

So, how much deuterium was there in the primordial phase of our Universe?

This information can tell us how much atomic matter (i.e., baryons) there is all in all in the Universe today! This latter quantity has recently been measured with great precision by the Planck satellite, according to which baryonic matter constitutes only the

ERC Advanced Grant to Prof. J. J. Gomez-Cadenas

September 17, 2013 by tiinatimonen

Tue, 17/09/2013
Tue, 17/09/2013

Our Invisibles colleague Prof. J. J. Gomez-Cadenas  (University of Valencia) has been awarded the prestigious ERC Advanced Grant. The grant will support the experimental quest on neutrinoless double-beta decay in the experiment NEXT, that he proposed and leads.

 

For more information, please go to:  http://next.ific.uv.es/next/

Occhialini Prize is awarded to Prof. Silvia Pascoli

September 13, 2013 by admin

Fri, 13/09/2013
Fri, 13/09/2013

Prof. Silvia Pascoli, PI of the UDUR node of the ITN- Invisibles and a Professor of Physics at the University of Durham and deputy director of the Institute for Particle Physics Phenomenology has been awarded the 2013 Occhialini Medal and Prize.

The award is given for her “major contributions to the study of, and leadership in, the field of neutrino phenomenology”.

For more information, please go to: http://www.iop.org/news/13/aug/page_60961.html.

Results on neutrinoless double beta decay of Ge-76 from GERDA Phase I

July 31, 2013 by admin

Interviewee image: 
Introduction: 
Neutrinos are the most elusive of all Standard Model particles due to the fact that they interact extremely weakly with all other forms of matter. Yet, they are the most abundant particles in our Universe (besides photons), which makes it of great importance to measure and understand their properties in detail. One of their most astonishing features was proposed by Ettore Majorana in the 1930s, suggesting that, unlike all other elementary constituents of the Cosmos, neutrinos could be their own antiparticles.
Documents: 
Question: 
Did you know the majority of particles also have a corresponding antiparticle?
Answer: 
<p>Many concepts in the world come with their opposite: good and bad, black and white, up and down, etc. This is true for a lot of things but not for the totality. For example, the majority of particles also have a corresponding antiparticle, but for some of them, the antiparticle is the particle itself. These are called intrinsically neutral particles.</p> <p>&nbsp;</p> <p>The fermionic (i.e. spin 1/2) sector is the only one in the Standard Model for which we don&rsquo;t yet know if there exist intrinsically neutral fundamental particles. In general, an intrinsically neutral fermion is called a Majorana particle. Otherwise, it is called a Dirac particle. We know, for example, that Majorana fermions can emerge in superconducting materials as quasi-particle bound states, but we don&rsquo;t know if fundamental Majorana fermions exist. Currently, the only known candidates for this role are the neutrinos.</p> <p>&nbsp;</p> <p>The situation is more clear for the other sectors in the Standard Model. For example, if the analysis at LHC would confirm that the observed Higgs particle is indeed the Standard Model Higgs boson, it would be the first example of a scalar (i.e. spin 0) intrinsically neutral fundamental particle. Before the LHC discovery we only knew examples of composite intrinsically neutral scalar particles, as for instance the neutral pion, which is a meson formed by a bounded quark-antiquark pair.</p> <p>&nbsp;</p> <p>In the vector (i.e. spin 1) sector there are two examples of intrinsically neutral fundamental particles: the photon, that is the carrier of electromagnetic interactions, and the Z boson, that mediates neutral weak interactions.</p> <p>&nbsp;</p> <p>Also the graviton, the unique spin 2 fundamental particle which is at the moment only hypothetical, should be an intrinsically neutral particle.</p> <p>If neutrinos are Majorana particles, they could generate a peculiar process that consists in a nuclear decay without any neutrino emission. This process is called neutrinoless double beta decay and is forbidden if neutrinos are Dirac particles.</p> <p>&nbsp;</p> <p>A possible future observation of a neutrinoless double beta decay would enable us to conclude that neutrinos are Majorana particles, fitting an intrinsically neutral fundamental particle also in the fermionic sector.</p> <p>&nbsp;</p> <p>Text by Michele Lucente.</p>

Deep under the Gran Sasso mountain in Italy, the GERDA experiment is searching for the neutrinoless double beta decay, a process which, if discovered, would prove Majorana's conjecture. In normal beta decay, a neutron inside a nucleus decays into a proton, an electron and an antineutrino. For some nuclei, such as germanium-76, this process is energetically forbidden. However, the simultaneous decay of two neutrons with the emission of two electrons and two antineutrinos is possible and has been measured to have a half-life of about 100 billion times the age of the Universe.

Invisibles Art

July 18, 2013 by admin

Thu, 18/07/2013
Thu, 18/07/2013

An original exhibition exploring science with art. 

Opening by Prof. Sir Arnold Wolfendale FRS. 

Invisibles Art Group: Steve Sproates, Chrissie Morgan, Bruce Burn, Catherine Yates, Bill Harris, Dawn Douglas, Michael Grogan, Angela Sandwith and Maggie Parker. 

Place: Lumley Castle Hotel, Chester le Street, DH3 4NX

Time: 18 july 2013 18:00-19:30 

Connecting Direct Dark Matter Detection Experiments to Cosmologically Motivated Halo Models

June 26, 2013 by admin

Interviewee image: 
Introduction: 
Approximately 85% of the matter content of the Universe is in the form of Dark Matter. Unlike ordinary matter -- composed of particles from the Standard Model of particle physics – the existence of dark matter has only been inferred from its gravitational effects.
Documents: 

Connecting Direct Dark Matter Detection Experiments to Cosmologically Motivated Halo Models

Yao-Yuan Mao, Louis E. Strigari, Risa H. Wechsler ( KIPAC/Stanford)

 

Approximately 85% of the matter content of the Universe is in the form of Dark Matter. Unlike ordinary matter -- composed of particles from the Standard Model of particle physics – the existence of dark matter has only been inferred from its gravitational effects.

 

A first trip to the world of particle physics

April 23, 2013 by admin

Interviewee image: 
Introduction: 
The forces in Nature | Quantum field theory | The "Standard" Model | The mystery of the Higgs | Beyond the Standard Model?

On March 21st the ESA Planck satellite cosmic microwave background (CMB) temperature and lensing potential power spectra measurements are publicly available. Planck measurements at multipoles l > 40 perfectly agree with the so-called LambdaCDM scenario (a flat universe with a cosmological constant as the dark energy component, with a power law of adiabatic primordial perturbations).