Collaboration, D;
(1997)
Search for a Fourth Generation Charge -1/3 Quark via Flavor Changing Neutral Current Decay.
Physical Review Letters
, 78
(20)
3818 - 3823.
10.1103/PhysRevLett.78.3818.
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Abstract
We report on a search for pair production of a fourth generation charge -1/3 quark (b') in pbar p collisions at sqrt(s) = 1.8 TeV at the Fermilab Tevatron using an integrated luminosity of 93 pb^-1. Both quarks are assumed to decay via flavor changing neutral currents (FCNC). The search uses the signatures gamma + 3 jets + mu-tag and 2 gamma + 2 jets. We see no significant excess of events over the expected background. We place an upper limit on the production cross section times branching fraction that is well below theoretical expectations for a b' quark decaying exclusively via FCNC for b' quark masses up to m(Z) + m(b).
| Type: | Article |
|---|---|
| Title: | Search for a Fourth Generation Charge -1/3 Quark via Flavor Changing Neutral Current Decay |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.78.3818 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.78.3818 |
| Language: | English |
| Additional information: | © 1997 The American Physical Society Eleven pages, two postscript figures, submitted to Physical Review Letters |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1373918 |
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