Palash Baran Pal coauthored a study asking whether a grand unified theory can explain the number of fermion generations. The paper tests antisymmetric representations of special unitary groups, using branching rules and gauge anomaly cancellation to restrict the matter content. Its proposed construction illustrates how mathematical consistency can eliminate particle models before their detailed phenomenology is considered; the generation count depends on the model's assumptions.[ref]
Number of fermion generations from a novel grand unified model by Pritibhajan Byakti and others. Abstract and section 3: failed embeddings, representation branching and proposed generation-count construction
Portrait of Palash Baran Pal
. Suratnadas; 24 June 2017; source listed as own work; uploader Frangipani white. CC BY-SA 4.0, via Wikimedia Commons. Source.
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