@article{77f944ce5da9447bbdcb44054d62e823,
title = "Search for a fourth-generation quark more massive than the Z0 boson in pp¯ collisions at √s = 1.8 TeV",
abstract = "We present the results of a search for pair production of a fourth-generation charge -1/3 quark (b′) in √s=1.8 TeV pp¯ collisions using 88 pb−1 of data obtained with the Collider Detector at Fermilab. We assume that both quarks decay via the flavor-changing neutral current process b′→bZ0 and that the b′ mass is greater than mZ+mb. We studied the decay mode b′b′¯→Z0Z0bb¯ where one Z0 decays into e+e− or μ+μ− and the other decays hadronically, giving a signature of two leptons plus jets. An upper limit on the σpp¯→b′b′¯×[B(b′→bZ0)]2 is established as a function of the b′ mass. We exclude at 95\% confidence level a b′ quark with mass between 100 and 199 GeV/c2 for B(b′→bZ0)=100\%.",
author = "\{CDF Collaboration\} and T. Affolder and H. Akimoto and A. Akopian and Albrow, \{M. G.\} and P. Amaral and Amendolia, \{S. R.\} and D. Amidei and J. Antos and G. Apollinari and T. Arisawa and T. Asakawa and W. Ashmanskas and M. Atac and F. Azfar and P. Azzi-Bacchetta and N. Bacchetta and Bailey, \{M. W.\} and S. Bailey and \{de Barbaro\}, P. and A. Barbaro-Galtieri and Barnes, \{V. E.\} and Barnett, \{B. A.\} and M. Barone and G. Bauer and F. Bedeschi and S. Belforte and G. Bellettini and J. Bellinger and D. Benjamin and J. Bensinger and A. Beretvas and Berge, \{J. P.\} and J. Berryhill and S. Bertolucci and B. Bevensee and A. Bhatti and C. Bigongiari and M. Binkley and D. Bisello and Blair, \{R. E.\} and C. Blocker and K. Bloom and B. Blumenfeld and Blusk, \{B. S.\} and A. Bocci and A. Bodek and W. Bokhari and G. Bolla and Y. Bonushkin and J. Olsen",
year = "2000",
doi = "10.1103/PhysRevLett.84.835",
language = "English (US)",
volume = "84",
pages = "835--840",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "5",
}