Vanishing Str M 2 in the presence of anomalous U A ( 1 ) Jorge


We show that the presence of an anomalous UA(1) factor in the gauge group of string-derived models may have the new and important phenomenological consequence of allowing the vanishing of StrM2 in the “shifted” vacuum, that results in the process of cancelling the anomalous UA(1). The feasibility of this effect seems to be enhanced by a vanishing vacuum… (More)


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