Bulletin of the American Physical Society
2005 APS April Meeting
Saturday–Tuesday, April 16–19, 2005; Tampa, FL
Session T8: Higgs Searches with W's and Z's |
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Sponsoring Units: DPF Chair: Sharon Hagopian, Florida State University Room: Marriott Tampa Waterside Room 4 |
Monday, April 18, 2005 1:30PM - 1:54PM |
T8.00001: Measurement of $Wb\bar{b}$\ cross section at CDF Mitchell Soderberg We present a preliminary measurement of the $Wb\bar{b}$\ cross section in $p\bar{p}$\ collisions at $\sqrt{s}$=1.96 TeV at the Collider Detector at Fermilab. We measure the cross section using events which contain one high transverse momentum lepton, missing transverse energy, and one or two jets including one jet tagged with a displaced secondary vertex. We use the invariant mass and pseudo-lifetime of the vertex to discriminate between b-quark jets, charm jets, and mistags. [Preview Abstract] |
Monday, April 18, 2005 1:54PM - 2:06PM |
T8.00002: Measurement of the $W\to e\nu + \ge n-jet$ Cross Section at the Tevatron Ben Cooper Understanding direct $W$ + jets production is crucial to making accurate background predictions to both top quark production and many of the Higgs production channels. We present a measurement of the $W\to e\nu + \ge n-jet$ cross section at $\sqrt{s} = 1.96$~${\rm TeV}$ using $320$~${\rm pb^{-1}}$ of CDF Run II data. Distributions of various kinematic variables are compared with two different Monte Carlo matrix element plus parton shower (ME-PS) predictions: Enhanced Leading Order ALPGEN+HERWIG samples, and `ME-PS matched' CKKW MADGRAPH+PYTHIA samples. [Preview Abstract] |
Monday, April 18, 2005 2:06PM - 2:18PM |
T8.00003: Search for a New Particle $X$($\to b\bar{b}$) Production in Association with a $W^{\pm}$ Boson at the Tevatron Yoshio Ishizawa We present an updated search for a new particle that decays into $b\bar{b}$ and is produced in association with $W^{\pm}$ boson in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV. The search uses a Run II dataset accumulated by the CDF experiment at the Fermilab corresponding to an integrated luminosity of about $300$ pb$^{-1}$. We select events with an electron or muon, large missing transverse energy, and two jets, with at least one of the jets $b$-tagged. We present results as a function of new particle mass. In particular, we place upper limits on the cross section of $W^\pm h \to W^\pm b\bar{b}$ and $\rho_{TC} \to W^\pm \pi_{TC} \to W^\pm b\bar{b}$ production. [Preview Abstract] |
Monday, April 18, 2005 2:18PM - 2:30PM |
T8.00004: Search for Higgs Boson Production via the Process $p\bar{p}\rightarrow ZH \rightarrow l^{+}l^{-}b\bar{b}$ at CDF Jonathan Efron, Benjamin Kilminster, Brian Winer, Richard Hughes We are conducting a search for the Higgs boson via the process $p\bar{p} \rightarrow ZH \rightarrow l^{+}l^{-} b\bar{b}$ using 300 pb$^{-1}$ of data from CDF Run II. The Higgs Boson is predicted by the Standard Model but has yet to be observed. The main background of this $ZH$ signal is $Z + b\bar{b}$, where the $Z$ decays into two charged leptons. The background is distinguished from the signal using an artificial neural network that we have developed. We will report on the status of the search and the future prospects using the anticipated large data samples from Run II. [Preview Abstract] |
Monday, April 18, 2005 2:30PM - 2:42PM |
T8.00005: Search for $Wb\bar{b}$ and $WH$ production in $p\bar{p}$ collisions at $\sqrt s=1.96$ TeV Hyunwoo Kim We present a study of $Wb\bar{b}$ production and a search for $WH$ production of the SM Higgs boson masses between 105 and 135 GeV in $p\bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV. The search is performed in events containing one election, an imbalance in the transverse enegy($E_T$) and two $b$-tagged jets in 400 $pb^{-1}$ of integrated luminosity accumulated collected by the D\O\ experiment at Fermilab. [Preview Abstract] |
Monday, April 18, 2005 2:42PM - 2:54PM |
T8.00006: Search for Associated Production of $Z$ and Higgs Bosons in $\mu^+\mu^-b\bar{b}$ final states Huishi Dong We present the preliminary results from the D\O\ experiment at Fermilab on a search for the light mass Standard Model Higgs Boson produced in association with a $Z$ boson in the $\mu^+\mu^-b\bar{b}$ channel. We present an optimized analysis strategy for the most significant background of this process, the QCD production of $b\bar{b}$ associated with the $Z$ boson, and introduce the topological analysis method for the selection and reconstruction of this kind of signals. [Preview Abstract] |
Monday, April 18, 2005 2:54PM - 3:06PM |
T8.00007: Search for Associated Production of $Z$ and Higgs Bosons in $e^+e^-b\bar{b}$ final states James Heinmiller Studies are presented of the search for a light Standard Model Higgs boson produced in association with a $Z$ boson in the $Z \rightarrow e^+e^-$ and $h \rightarrow b\bar{b}$ decay channel using Run II data collected by the D\O\ detector at the Fermilab $p\bar{p}$ collider at $\sqrt{s} = 1.96$ TeV. A preliminary measurement of the cross section of the $Z$-boson associated production with jets is also presented. [Preview Abstract] |
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