Juan Barranco

Probing new physics with coherent neutrino scattering off nuclei

The possibility off measuring for the first time neutrino-nuclei coherent scattering has been recently discussed by several experimental collaborations. It is shown that such a measurement may be very sensitive to non-standard interactions of neutrinos with quarks and might set better constraints than those coming from future neutrino factory experiments. We also comment on other types of new physics tests, such as extra heavy neutral gauge bosons, where the sensitivity to some models is slightly better than the Tevatron constraint and, therefore, could give complementary bounds.

Sensitivity of low energy neutrino experiments to physics beyond the Standard Model

We study the sensitivity of future low energy neutrino experiments to extra neutral gauge bosons, leptoquarks, and R-parity breaking interactions. We focus on future proposals to measure coherent neutrino-nuclei scattering and neutrino-electron elastic scattering. We introduce a new comparative analysis between these experiments and show that in different types of new physics it is possible to obtain competitive bounds to those of present and future collider experiments. For the cases of leptoquarks and R-parity breaking interactions we found that the expected sensitivity for most of the future low energy experimental setups is better than the current constraints.

Confronting spin flavor solutions of the solar neutrino problem with current and future solar neutrino data

A global analysis of spin flavor precession (SFP) solutions to the solar neutrino problem is given, taking into account the impact of the full set of latest solar neutrino data, including the recent SNO data and the 1496-day Super-Kamiokande data. These are characterized by three effective parameters:

Self-gravitating system made of axions

\ensuremath{\Delta}{m}_{\mathrm{SOL}}^{2}\ensuremath{\equiv}\ensuremath{\Delta}{m}^{2},

Schwarzschild black holes can wear scalar wigs

the neutrino mixing angle

Constraining scalar fields with stellar kinematics and collisional dark matter

{\ensuremath{\theta}}_{\mathrm{SOL}}\ensuremath{\equiv}\ensuremath{\theta},

Constraining non-standard interactions in nu(e) e or anti-nu(e) e scattering

and the magnetic field parameter

Universal Mass Texture, CP violation and Quark-Lepton Complementarity

\ensuremath{\mu}{B}_{\ensuremath{\perp}}.

Schwarzschild scalar wigs: spectral analysis and late time behavior

For the last we adopt a self-consistent magnetohydrodynamics field profile in the convective zone and identify an optimum

Unparticle physics and neutrino phenomenology

{B}_{\ensuremath{\perp}}\ensuremath{\sim}80\mathrm{kG}