by Nicolás Bernal (ICTP - SAIFR, São Paulo, Brazil)

Thursday, 18 June 2015 from 12:00 to 13:00 (Europe/Madrid)
at IFIC ( Seminar Room 1.1.1 )

ABSTRACT

We propose and study a scalar extension of the Standard Model which 
respects a ℤ3 symmetry remnant of the spontaneous breaking of a global 
U(1) symmetry. Consequently, this model has a natural dark matter 
candidate and a Goldstone boson in the physical spectrum. In addition, 
the Higgs boson properties are changed with respect to the Standard 
Model due to the mixing with a new particle. We explore regions in 
the parameter space taking into account bounds from the measured Higgs 
properties, dark matter direct detection as well as measurements of 
the effective number of neutrino species before recombination. The dark 
matter relic density is determined by three classes of processes: 
the usual self-annihilation, semi-annihilation and purely dark matter 
3→2 processes. The latter has been subject of recent interest leading 
to the so-called `Strongly Interacting Massive Particle' (SIMP) scenario. 
We show under which conditions our model can lead to a concrete 
realization of such scenario and study the possibility that the dark 
matter self-interactions could address the small scale structure problems. 
In particular, we find that in order for the SIMP scenario to work, 
the dark matter mass must be in the range 7−115 MeV, with the global 
symmetry energy breaking scale in the TeV range.

http://indico.ific.uv.es/indico/conferenceDisplay.py?confId=2483

by Monojit Ghosh (Physical Research Laboratory, Ahmedabad (India))

Tuesday, 16 June 2015 from 12:00 to 13:00 (Europe/Madrid)
at IFIC ( Seminar Room 1.1.1 )

ABSTRACT

The phenomenon of neutrino oscillation is now well understood from the solar, 
atmospheric, reactor and accelerator neutrino experiments. This oscillation 
is characterized by a unitary PMNS matrix which is parametrized by three 
mixing angles and one phase known as the leptonic CP phase. Though there 
are already significant amount of information about the three mixing angles 
but the CP phase is still unknown. In my talk I will describe the synergy 
between the long-baseline (LBL) experiment NOVA, T2K and the atmospheric 
neutrino experiment ICAL@INO for obtaining the first hint of CP violation 
in the lepton sector.

http://indico.ific.uv.es/indico/conferenceDisplay.py?confId=2527

Roberto Franceschini (CERN)

Energy peaks and future progress on the top quark mass measurement

Abstract

In this talk I will review recent experimental results on the measurement of top quark mass and their relation to open theoretical issues about the physics of the Standard Model and beyond. With the goal of getting a better understanding of these issues, I will present a class of new top quark mass measurement techniques. The proposed measurement determines the top quark mass from the position of the peak of the energy distribution of the top quark decay products (for instance bottom quark jets or hadrons). Preliminary results on the top quark mass determination from energy distributions computed at Next to Leading Order in QCD will be presented.