Are exotic stable quarks cosmologically allowed?

Details Are exotic stable quarks cosmologically allowed? Are exotic stable quarks cosmologically allowed?

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phlb..245..105n&link_type=abstract

Physics Letters B, Volume 245, Issue 1, p. 105-110.

Physics

34

Scientific paper

We examine the possibility that new exotic quarks, as for example the Q=-1/3 charged quarks predicted by E6 models, are stable. We show that their cosmological consequences combined with the bounds that arise from superheavy element searches, together with the bounds recently derived by requiring that heavy particles captured by neutron stars do not induce their collapse into a black hole, exclude that possibility. This implies that in these models some mechanism must exist to allow the exotic quark decay.

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