Neutrino mass and cosmological baryon excess in left-right symmetric grand unified theories |
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| Authors: | M Fukugita T Yanagida M Yoshimura |
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| Institution: | 1. National Laboratory for High Energy Physics, Tsukuba-gun, Ibaraki 305, Japan;2. Physics Department, College of General Education, Tohoku University, Sendai 980, Japan |
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| Abstract: | In left-right symmetric grand unified theories both the smallness of the neutrino mass and a sizable cosmological baryon excess can be ascribed to a superheavy Majorana lepton. We show, taking SO(10) as the simplest model of this kind, that the largest neutrino mass is constrained to lie between 10?3 eV and 100 eV in order to give the observed magnitude of baryon excess. |
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