by Massimiliano Lattanzi (Università di Ferrara and INFN Ferrara) Tuesday, 24 March 2015 from 12:00 to 13:00 (Europe/Madrid) at Universe ( 1001-Primera-1-1-1 - Paterna. Seminario ) ABSTRACT The Planck satellite…
Continue Reading Planck 2015 observations of CMB temperature and polarisation anisotropies: implications for cosmology
by Victor Semikoz (IZMIRAN, Moscow, Russia) Tuesday, 5 May 2015 from 12:00 to 13:00 (Europe/Madrid) at IFIC ( Seminar Room 1.1.1 ) ABSTRACT We study the instability of magnetic fields…
Continue Reading Magnetic field instability in a neutron star driven by the electroweak electron-nucleon interaction
LSND and MiniBooNE anomalies as a signal of heavy sterile neutrinos
Continue Reading Seminars of 2011
Neutralino decaying dark matter
different R-parity violating couplings can yield an unstable
neutralino. We show that in this context astrophysical and
cosmological constraints on neutralino decaying dark matter forbid
bilinear R-parity breaking neutralino decays and lead to a class of
purely trilinear R-parity violating scenarios in which the
neutralino is stable on cosmological scales. We have found that
among the resulting models some of them become suitable to explain
the observed anomalies in cosmic-ray electron/positron fluxes.
Continue Reading Seminars of 2010
Oscillations of Mossbauer neutrinos
Mossbauer neutrinos can oscillate. After giving quantum mechanical arguments to support this statement, we will compute the oscillation probability of Mossbauer neutrinos, including localization and decoherence terms, in a
quantum mechanical wave packet model. We will then proceed to the calculation of the combined rate of Mossbauer neutrino emission, propagation and absorption in the framework of quantum field theory. This approach allows us to avoid making any a priori assumptions on the neutrino wave function, and it can easily describe the various effects that broaden the neutrino emission and absorption lines. Finally, we will also address the unrealistic, but theoretically extremely interesting, case of Mossbauer neutrinos affected only by natural line broadening and not by solid state effects.
Continue Reading Seminars of 2009
Ettore Majorana, its neutrino legacy and beyond: a genius at work
Continue Reading Seminars of 2008
The Epoch of Reionization
Continue Reading Seminars of 2007
Supersymmetry breaking as the origin of flavor
Continue Reading Seminars of 2005
Invisible Higgs Boson Decays in Spontaneously Broken R-Parity
of the recent data on neutrino oscillations that indicate non-zero neutrino masses. We show that, despite the smallness of neutrino masses, the Higgs boson can decay mainly to the invisible Goldstone boson associated to the spontaneous breaking of lepton number.
The search for invisibly decaying Higgs bosons should be taken into account in the planning of future accelerators,
such as the Large Hadron Collider and the Next Linear Collider.
Continue Reading Seminars of 2004