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Light Colour-Triplet Higgs is Compatible with Proton Stability: An alternative approach to the doublet-triplet splitting problem
Gia Dvali
It is usually assumed that the proton stability requires the coloured triplet partner of the electroweak Higgs doublet to be superheavy (with a mass ). We show that t…
Is there a monopole problem?
Gia Dvali, Alejandra Melfo, Goran Senjanovic
We investigate the high temperature behavior of SU(5) in its minimal version. We show that there exists a range of parameters of the Higgs potential for which the symmetry remains…
REMOVING THE COSMOLOGICAL BOUND ON THE AXION SCALE
Gia Dvali
The current cosmological bound on the invisible axion scale may be avoided in the class of theories in which the gauge coupling constant is determined through the expectation value…
INFLATION INDUCED SUSY BREAKING AND FLAT VACUUM DIRECTIONS
Gia Dvali
We discuss how the inflation induced supersymmetry breaking affects the flat directions of SUSY vacua. We show that under general assumptions all gauge nonsinglet fields, parameter…
INFLATION VERSUS THE COSMOLOGICAL MODULI PROBLEM
Gia Dvali
We show that in generic supergravity theories the mass of the moduli during inflation is larger (or at least of the same order of magnitude) than the Hubble constant. This fact doe…
IS THERE A DOMAIN WALL PROBLEM?
Gia Dvali, Goran Senjanovic
We show that spontaneous breaking of discrete or continuous symmetries does not necessarily imply either symmetry restoration or the thermal production of defects at high temperatu…