Bulletin of the American Physical Society
2008 APS April Meeting and HEDP/HEDLA Meeting
Volume 53, Number 5
Friday–Tuesday, April 11–15, 2008; St. Louis, Missouri
Session M11: Higgs II |
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Sponsoring Units: DPF Chair: Ricardo Flores, University of Missouri-St. Louis Room: Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), St. Louis B |
Sunday, April 13, 2008 3:30PM - 3:42PM |
M11.00001: Search for charged Higgs in lepton+jets channel at CDF Geumbong Yu We present a search for an anomalous boson in top decays using pairly produced top events collected by CDF II detector at the Fermilab Tevatron. Our search focuses on a boson which decays into two jets, like hadronic $W$ decays in the leptop+jets $t\bar t$ decay processes. With well identified lepton and $b$ jets, reconstructed di-jet mass would represent higher mass than $W$ if there is another particle produced from top. We especially concern about charged Higgs(MSSM) in low tan$\beta$ plane near 1 with mass between 90 GeV/$c^2$ and 150 GeV/$c^2$. Here we will present the sensitivity of finding such abnormal particle from top decays. [Preview Abstract] |
Sunday, April 13, 2008 3:42PM - 3:54PM |
M11.00002: Search for a Charged Higgs Boson with Decay to a Top Quark and a Bottom Quark at D0 Christopher Potter The large mass of the top quark, close to the electroweak symmetry-breaking scale, makes it a good candidate for probing physics beyond the Standard Model. Single top quarks may be produced in the decay of a charged Higgs boson predicted by several extensions of the Standard Model. We present limits on the production cross section of such a particle using a 0.9~fb$^{-1}$ dataset. [Preview Abstract] |
Sunday, April 13, 2008 3:54PM - 4:06PM |
M11.00003: The ATLAS Charged Higgs Trigger Strategy and Discovery Potential Chris Potter The charged Higgs boson is predicted in any extension of the Standard Model with two or more Higgs doublets. Since these models do not predict the mass of the charged Higgs boson, many scenarios are possible for its production, decay and discovery at the Large Hadron Collider. Trigger strategies for MSSM charged Higgs events with the ATLAS detector are discussed, as well as the discovery potential. [Preview Abstract] |
Sunday, April 13, 2008 4:06PM - 4:18PM |
M11.00004: Search for Neutral Supersymmetric Higgs Bosons in bbb(b) Final States Tim Scanlon Many extensions of the Standard Model predict greatly enhanced production rates of neutral Higgs bosons in association with bottom quarks. This production manifests itself as an excess of events with 3 and 4 b-jets in the final states over the multijet background. We present results for a search for Higgs bosons in bh~($\rightarrow$bb) and bbh~($\rightarrow$bb) channels using 2 fb$^{-1}$ of data collected by the D0 detector at the Tevatron. [Preview Abstract] |
Sunday, April 13, 2008 4:18PM - 4:30PM |
M11.00005: Search for Neutral Supersymmetric Higgs Bosons in di-tau Final States Wan-Ching Yang In Supersymmetric models the Higgs boson production cross section can be significantly enhanced compared to the Standard Model. In such models, the Higgs boson has a significant branching ratio to tau leptons at all masses. We present a search for neutral Higgs boson production in the di-tau decay mode using data corresponding to 2 fb$^{-1}$ of integrated luminosity collected by the D0 experiment at the Tevatron collider. [Preview Abstract] |
Sunday, April 13, 2008 4:30PM - 4:42PM |
M11.00006: Search for Standard Model Higgs Particle in Two Photon Final State at LHC Jaehoon Yu, Hyeonjin Kim The Higgs particle is a manifestation of the Higgs mechanism that gives masses to leptons and quarks and is the last missing piece in the Standard Model. The Higgs particle has been sought over the past three decades but has not been found. The precision measurements of masses of W vector bosons and the top quark have been providing valuable information in searching for the Higgs particle. The ATLAS experiment at the Large Hadron Collider facility is going to be turned on this year and will dramatically extend the kinematic range of the search for the Higgs particle. One of the cleanest channels for the search for the Standard Model Higgs is using its two photon or four electron final states. In preparation for the imminent turn on of the LHC and the experiment, we have been working on developing electron and photon identification algorithms using the covariant matrix technique. In this presentation, we present the results of the Higgs search strategy in its two photon final state using this technique at ATLAS experiment and its performance test using simulated data. [Preview Abstract] |
Sunday, April 13, 2008 4:42PM - 4:54PM |
M11.00007: ABSTRACT WITHDRAWN |
Sunday, April 13, 2008 4:54PM - 5:06PM |
M11.00008: Search for Higgs boson using a matrix-element technique at CDF Barbara Alvarez, Javier Cuevas, Florencia Canelli, Bernd Stelzer, Rocio Vilar We present a search for Higgs produced in association with a $W$ boson using 2 fb$^{-1}$ of data accumulated with the CDF detector at the Fermilab Tevatron. Events used in this analysis are selected with one charged lepton, large missing transverse energy, and two or three jets, where at least one jet is identified as a $b$-quark jet using displaced secondary-vertex information from the silicon detector. Using a matrix-element analysis technique and a neural-network jet-flavor separator we improve separation of signal and background and greatly improve the sensitivity of our search. [Preview Abstract] |
Sunday, April 13, 2008 5:06PM - 5:18PM |
M11.00009: Search for Associated Production of W and Higgs Bosons in the All Hadronic Decay Mode Justace Clutter We present a search for a low mass standard model Higgs Boson particle, produced via an associated W Boson, in the hadronic decay channel where the Higgs Boson particle decays into two b quarks and the W Boson decays into two light quarks. The dataset, collected at the D0 experiment at Fermilab, has a total integrated luminosity of 1 fb$^{-1}$. A basic set of cuts designed to prefer a Higgs Boson hadronic decay signature including but not limited to the total number of jets and the number of b quark jets in an event is applied to the data. The data is further enhanced for the Higgs Boson decay though the use of a decision tree trained on a combination of Monte Carlo signal simulations and an orthogonal data sample, designed to represent the dominant QCD background, based on the requirement for a single b quark jet in the event. A two dimensional fit to the invariant mass of the two b quark jets and the invariant mass of the remaining two light quark jets is explored as a technique to determine a limit on the production cross section of the standard model Higgs Boson. [Preview Abstract] |
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