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

DØ Collaboration

doi:10.1103/PhysRevLett.78.3818

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

DØ Collaboration

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

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 m_z + m_b.

Original language	English
Pages (from-to)	3818-3823
Number of pages	6
Journal	Physical Review Letters
Volume	78
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.78.3818
State	Published - 1997
Externally published	Yes

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10.1103/PhysRevLett.78.3818

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@article{d1cacd7d927740bfaa540f7f90dc174a,

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 M. Demarteau",

year = "1997",

doi = "10.1103/PhysRevLett.78.3818",

language = "English",

volume = "78",

pages = "3818--3823",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "20",

}

TY - JOUR

T1 - Search for a Fourth Generation Charge -1/3 Quark via Flavor Changing Neutral Current Decay

AU - DØ Collaboration

AU - Abachi, S.

AU - Abbott, B.

AU - Abolins, M.

AU - Acharya, B. S.

AU - Adam, I.

AU - Adams, D. L.

AU - Adams, M.

AU - Ahn, S.

AU - Aihara, H.

AU - Alves, G. A.

AU - Amidi, E.

AU - Amos, N.

AU - Anderson, E. W.

AU - Astur, R.

AU - Baarmand, M. M.

AU - Baden, A.

AU - Balamurali, V.

AU - Balderston, J.

AU - Baldin, B.

AU - Banerjee, S.

AU - Bantly, J.

AU - Bartlett, J. F.

AU - Bazizi, K.

AU - Belyaev, A.

AU - Beri, S. B.

AU - Bertram, I.

AU - Bezzubov, V. A.

AU - Bhat, P. C.

AU - Bhatnagar, V.

AU - Bhattacharjee, M.

AU - Biswas, N.

AU - Blazey, G.

AU - Blessing, S.

AU - Bloom, P.

AU - Boehnlein, A.

AU - Bojko, N. I.

AU - Borcherding, F.

AU - Borders, J.

AU - Boswell, C.

AU - Boehnlein, A. A.

AU - Brock, R.

AU - Bross, A.

AU - Buchholz, D.

AU - Burtovoi, V. S.

AU - Butler, J. M.

AU - Carvalho, W.

AU - Casey, D.

AU - Castilla-Valdez, H.

AU - Chakraborty, D.

AU - Demarteau, M.

PY - 1997

Y1 - 1997

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0348055665

U2 - 10.1103/PhysRevLett.78.3818

DO - 10.1103/PhysRevLett.78.3818

M3 - Article

AN - SCOPUS:0348055665

SN - 0031-9007

VL - 78

SP - 3818

EP - 3823

JO - Physical Review Letters

JF - Physical Review Letters

IS - 20

ER -

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

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