Timur I. Rashba

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.

Cornering solar radiative-zone fluctuations with KamLAND and SNO salt

We update the best constraints on fluctuations in the solar medium deep within the solar radiative zone to include the new SNO salt solar neutrino measurements. We find that these new measurements are now sufficiently precise that neutrino-oscillation parameters can be inferred independently of any assumptions about fluctuation properties. Constraints on fluctuations are also improved, with amplitudes of 5% now excluded at the 99% confidence level for correlation lengths in the range of a few hundred kilometres. Because they are sensitive to correlation lengths which are so short, these solar neutrino results are complementary to constraints coming from helioseismology.

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:

The simplest resonant spin-flavour solution to the solar neutrino problem

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

Large Mixing Angle Oscillations as a Probe of the Deep Solar Interior

the neutrino mixing angle

Resonant origin for density fluctuations deep within the Sun: helioseismology and magneto-gravity waves

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

Enhanced solar antineutrino flux in random magnetic fields

and the magnetic field parameter

Neutrino scattering on polarized electron target as a test of neutrino magnetic moment

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

Probing the internal solar magnetic field through g modes

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

Radiative zone solar magnetic fields and g modes

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