DO Search for the Higgs Boson in Multijet Events

Journal Article · Tue Jul 11 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2220358· OSTI ID:20875801

Melnitchouk, Alex ^[1]

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1. Department of Physics and Astronomy, University of Mississippi, 108 Lewis Hall, P.O. Box 1848, University, MS 38677-1848 (United States)

We present two searches for the Higgs boson in {radical}(s) = 0.96 TeV pp(bar sign) collisions using data taken with the DO detector during Run II of the Fermilab Tevatron collider. The first study is a search for neutral Higgs bosons produced in association with bottom quarks. The cross sections for these processes are enhanced in many extensions of the standard model (SM), such as in its minimal supersymmetric extension at large tan{beta}. The results of our analysis agree with expectations from the SM, and we use our measurements to set upper limits on the production of neutral Higgs bosons in the mass range of 90 to 150 GeV.The second study is a search for the standard model Higgs boson produced in association with the Z boson. We study the pp(bar sign) {yields} ZH {yields} vv(bar sign)bb(bar sign) channel, which is one of the most sensitive ways to search for light Higgs bosons at the Tevatron. We select multijet events with large imbalance in transverse momentum and two b-tagged jets. Then we search for a peak in invariant mass distribution of two b-tagged jets. After subtracting the backgrounds, we set the 95% C.L. upper limits on the {sigma}(pp(bar sign) {yields} ZH {yields} vv(bar sign)) x BR(H {yields} bb(bar sign)) for Higgs masses between 105 and 135 GeV.

• OSTI ID: 20875801
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 842; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
COLLIDING BEAMS
CROSS SECTIONS
FERMILAB TEVATRON
GEV RANGE
HIGGS BOSONS
HIGGS MODEL
MASS DISTRIBUTION
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PROTON-ANTIPROTON INTERACTIONS
STANDARD MODEL
SUPERSYMMETRY
TEV RANGE
TRANSVERSE MOMENTUM
VISIBLE RADIATION
Z NEUTRAL BOSONS