Electrically neutral quarks: Production of fractionally charged hadrons

Details Electrically neutral quarks: Production of fractionally charged hadrons Electrically neutral quarks: Production of fractionally charged hadrons

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phrvd..27.1696w&link_type=abstract

Physical Review D (Particles and Fields), Volume 27, Issue 8, 15 April 1983, pp.1696-1704

Physics

3

Scientific paper

We explore some observational consequences of the existence of electroweak neutral, color-triplet fermions, which combine with ordinary quarks to form fractionally charged hadrons (FCH) within QCD. Within the standard big-bang model, it is found that at least ~4×10-20 FCH per photon survive from the early universe. Calculations of their production in hadron-hadron and e+-e- colliders set a lower limit of ~ 10 GeV to their mass. The cosmic-ray-produced abundance of FCH at the surface of the Earth and Moon is also calculated. Within a more general framework, we show that a (nonzero) cosmic abundance of fractionally charged particles per nucleon smaller than ~ 7×10-12 (outside stars) would be incompatible with the validity of standard (confining) QCD and the standard big-bang model.

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