Search for a fourth generation charge -1/3 quark via flavor changing neutral current decay
Phys.Rev.Lett. 78 (1997) 3818-3823, 1997.
The D0 collaboration

Abstract (data abstract)
FERMILAB-COLLIDER. Search for pair production of a fourth generation charge -1/3 quark (BQPRIME) in pbar-p collisions at a centre-of-mass energy of 1.8 TeV. BQPRIME quarks are assumed to decay via flavour changing neutral currents. The search uses the signatures (gamma+3jets+mutag) and (2gamma+2jet). No significant excesses above background are seen. Upper limits to the production cross sections are given. DE = D0.

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