Abstract
In a conference devoted to Grand Unification and to nucleon decay experiments in particular, it is perhaps not inappropriate at the end of such a meeting to discuss a phenomenon which, if observed, would owe its existence not so much to Grand as to “Petit” Unification. Such sacreligeous thoughts come from the spirit of enquiry which is now prepared to question the concept of baryon number conservation. In their simplest forms, Grand Unification symmetries of the type SU(5) naturally predict nucleon decay as second order in a ΔB=1 amplitude which transmutes quarks into leptons through the exchange of massive bosons (X) of around 1015 GeV; they do not allow for ΔB=2 processes of which neutron (N) antineutron (N̄) oscillation is the classic example. Unified theories with partial unification at mass scales of 105 GeV or greater can accommodate NN̄ transitions at a level which is amenable to experimental test and which if observed would imply a “flowering of the desert” between the electro-weak unification mass of 102 GeV and the so called grand unification mass of 1015 GeV.
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© 1981 Birkhäuser Boston
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Green, K. (1981). Review of Neutron-Antineutron Oscillation Experiments. In: Leveille, J.P., Sulak, L.R., Unger, D.G. (eds) The Second Workshop on Grand Unification. Birkhäuser Boston. https://doi.org/10.1007/978-1-4612-5990-9_9
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DOI: https://doi.org/10.1007/978-1-4612-5990-9_9
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