Search for a Fourth Generation Charge -1/3 Quark via Flavor Changing Neutral Current Decay


Journal Article

We report on a search for pair production of a fourth generation charge -1/3 quark (b’) in pp collisions at s = 1.8 TeV by the DØ experiment at the Fermilab Tevatron using an integrated luminosity of 93 pb-1. Both b’ quarks are assumed to decay via flavor changing neutral currents (FCNC). The search uses the signatures γ + 3 jets + μ-tag and 2γ + 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’ decaying exclusively via FCNC for b’ masses up to mz + mb. © 1996 American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Abachi, S; Abbott, B; Abolins, M; Acharya, BS; Adam, I; Adams, DL; Adams, M; Ahn, S; Aihara, H; Alves, GA; Amidi, E; Amos, N; Anderson, EW; Astur, R; Baarmand, MM; Baden, A; Balamurali, V; Balderston, J; Baldin, B; Banerjee, S; Bantly, J; Bartlett, JF; Bazizi, K; Belyaev, A; Beri, SB; Bertram, I; Bezzubov, VA; Bhat, PC; Bhatnagar, V; Bhattacharjee, M; Biswas, N; Blazey, G; Blessing, S; Bloom, P; Boehnlein, A; Bojko, NI; Borcherding, F; Borders, J; Boswell, C; Boehnlein, AA; Brock, R; Bross, A; Buchholz, D; Burtovoi, VS; Butler, JM; Carvalho, W; Casey, D; Castilla-Valdez, H; Chakraborty, D; Chang, SM; Chekulaev, SV; Chen, LP; Chen, W; Choi, S; Chopra, S; Choudhary, BC; Christenson, JH; Chung, M; Claes, D; Clark, AR; Cobau, WG; Cochran, J; Cooper, WE; Cretsinger, C; Cullen-Vidal, D; Cummings, MAC; Cutts, D; Dahl, OI; De, K; Del Signore, K; Demarteau, M; Denisov, D; Denisov, SP; Diehl, HT; Diesburg, M; Di Loreto, G; Draper, P; Drinkard, J; Alitti, J; Dudko, LV; Dugad, SR; Edmunds, D; Ellison, J; Elvira, VD; Engelmann, R; Eno, S; Eppley, G; Ermolov, P; Eroshin, OV; Evdokimov, VN; Fahland, T; Fatyga, M; Fatyga, MK; Featherly, J; Feher, S; Fein, D; Ferbel, T; Finocchiaro, G; Fisk, HE; Fisyak, Y

Published Date

  • January 1, 1997

Published In

Volume / Issue

  • 78 / 20

Start / End Page

  • 3818 - 3823

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/PhysRevLett.78.3818

Citation Source

  • Scopus