ar X iv : h ep - p h / 96 03 20 1 v 1 1 M ar 1 99 6 Nucleosynthesis and the Mass of the τ Neutrino

ar X iv : h ep - p h / 96 05 34 7 v 1 1 7 M ay 1 99 6 Neutrinos and Electromagnetic Gauge Invariance

It is discussed a recently proposed connection among U(1) em electromagnetic gauge invariance and the nature of the neutrino mass terms in the framework

ar X iv : h ep - p h / 96 03 21 6 v 1 4 M ar 1 99 6 SWAT 101 QUANTISATION OF GLOBAL ISOSPIN IN THE SKYRME CRYSTAL

A quantisation of chiral symmetry within the Skyrme crystal is carried out. The definition of global isospin in the crystal is explored, and found to be ambiguous. However, the state corresponding to a neutron crystal is identified, and the leading quantum correction to the classical mass is computed. The results are compared to those of Klebanov for a crystal of whole skyrmions.

ar X iv : h ep - p h / 94 03 31 6 v 1 1 8 M ar 1 99 4 Large tanβ from SU ( 2 ) R Gauge Symmetry

Sufficient conditions for the relation tanβ ≃ m t /m b to hold in supersym-metric grand unified theories are formulated. Essential ingredients are the SU(2) R gauge symmetry and a discrete matter parity. The applicability of our conditions is illustrated by specific examples. Implications for neutrino masses are discussed.

ar X iv : h ep - p h / 93 10 22 6 v 1 5 O ct 1 99 3 ASPECTS OF NEUTRINO COSMOLOGY

Primordial nucleosynthesis constrains the properties of light, stable neutrinos. Apart from the well–known limit on the number of neutrino species, there are also bounds on neutrino masses and magnetic moments. I discuss also sterile neutrinos and neutrino propagation in a primordial magnetic field, such as could be the origin of the observed galactic magnetic fields.

ar X iv : h ep - p h / 96 02 20 5 v 1 1 F eb 1 99 6 Multiplicity Distributions in QCD and λφ 36 - model