Abstract
Abstract The neutrinoless double β-decay mediated by heavy Majorana neutrinos or Higgs particles is studied in the presence of six-quark clusters in nuclei. The probability of finding such clusters in nuclei is estimated. The structure of the six-quark clusters, which may also be important for other short-range processes, is studied using group theoretical techniques in the group chain SU(24) ⊃ SUc(3) × SUx(2) × SUIS(4). Explicit calculations are presented in the case of the experimentally interesting 48Ca→48Ti decay.
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