@article{6c4e2508a75a4622983e5a6c987b16cd,
title = "Search for a Fourth Generation Charge -1/3 Quark via Flavor Changing Neutral Current Decay",
abstract = "We report on a search for pair production of a fourth generation charge -1/3 quark (b{\textquoteright}) in pp collisions at s = 1.8 TeV by the D{\O} experiment at the Fermilab Tevatron using an integrated luminosity of 93 pb-1. Both b{\textquoteright} 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{\textquoteright} decaying exclusively via FCNC for b{\textquoteright} masses up to mz + mb.",
author = "{D{\O} Collaboration} and S. Abachi and B. Abbott and M. Abolins and Acharya, {B. S.} and I. Adam and Adams, {D. L.} and M. Adams and S. Ahn and H. Aihara and Alves, {G. A.} and E. Amidi and N. Amos and Anderson, {E. W.} and R. Astur and Baarmand, {M. M.} and A. Baden and V. Balamurali and J. Balderston and B. Baldin and S. Banerjee and J. Bantly and Bartlett, {J. F.} and K. Bazizi and A. Belyaev and Beri, {S. B.} and I. Bertram and Bezzubov, {V. A.} and Bhat, {P. C.} and V. Bhatnagar and M. Bhattacharjee and N. Biswas and G. Blazey and S. Blessing and P. Bloom and A. Boehnlein and Bojko, {N. I.} and F. Borcherding and J. Borders and C. Boswell and Boehnlein, {A. A.} and R. Brock and A. Bross and D. Buchholz and Burtovoi, {V. S.} and Butler, {J. M.} and W. Carvalho and D. Casey and H. Castilla-Valdez and D. Chakraborty and S. Kunori",
year = "1997",
doi = "10.1103/PhysRevLett.78.3818",
language = "English",
volume = "78",
pages = "3818--3823",
journal = "Physical Review Letters",
issn = "0031-9007",
number = "20",
}