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Low scale gravity as the source of neutrino masses?

Veniamin Berezinsky1, Mohan Narayan1 and Francesco Vissani1

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We address the question whether low-scale gravity alone can generate the neutrino mass matrix needed to accommodate the observed phenomenology. In low-scale gravity the neutrino mass matrix in the flavor basis is characterized by one parameter (the gravity scale MX) and by an exact or approximate flavor blindness (namely, all elements of the mass matrix are of comparable size). Neutrino masses and mixings are consistent with the observational data for certain values of the matrix elements, but only when the spectrum of mass is inverted or degenerate. For the latter type of spectra the parameter Mee probed in double beta experiments and the mass parameter probed by cosmology are close to existing upper limits.

Keywords

Beyond Standard Model

Neutrino Physics

Solar and Atmospheric Neutrinos

 

E-print Number: hep-ph/0401029

Cited: by |

Refers: to

PACS

14.60.Pq Neutrino mass and mixing

98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)

12.10.Dm Unified theories and models of strong and electroweak interactions

02.10.Yn Matrix theory

04.60.-m Quantum gravity

Subjects

Mathematical physics

Gravitation and cosmology

Particle physics and field theory

Astrophysics and astroparticles

Dates

Issue 04 (April 2005)

Received 30 July 2004, accepted for publication 16 April 2005

Published 28 April 2005



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