Bulletin of the American Physical Society
APS April Meeting 2011
Volume 56, Number 4
Saturday–Tuesday, April 30–May 3 2011; Anaheim, California
Session G9: Tevatron Higgs Searches I |
Hide Abstracts |
Sponsoring Units: DPF Chair: Michael Eads, University of Nebraska–Lincoln Room: Grand G |
Sunday, May 1, 2011 8:30AM - 8:42AM |
G9.00001: Search for associated production of a Z and a Higgs Boson in $\ell\ell b\bar{b}$ final states at D0 Emily Johnson A search for the standard model Higgs boson was performed in the channel $ZH\rightarrow\ell\ell b\bar{b}$ with the D0 detector at the Fermilab Tevatron collider with 4.2~fb$^{-1}$ of data. Events are selected with at least two reconstructed jets and a Z candidate reconstructed from the two leptons. A random forest of decision trees was trained to distinguish between signal and background events in two orthogonal $b$-tag samples. This channel is powerful in the search for a low mass Higgs. [Preview Abstract] |
Sunday, May 1, 2011 8:42AM - 8:54AM |
G9.00002: ABSTRACT WITHDRAWN |
Sunday, May 1, 2011 8:54AM - 9:06AM |
G9.00003: Search for a standard model Higgs boson produced in association with a $W$ boson using a DLM and discriminant analysis at CDF Masakazu Kurata We present an analysis used to search for a standard model Higgs boson in final states containing a high transvere momentum lepton and two jets consisent with having originated from $b$-quarks. To discriminate between signal and background-like events in data, a Dynamical Likelihood Method (DLM) in conjunction with a linear discriminant analysis is used. [Preview Abstract] |
Sunday, May 1, 2011 9:06AM - 9:18AM |
G9.00004: Search for $ZH\rightarrow\ell\ell b\bar{b}$ Using The Matrix Element Technique at D0 Huong Nguyen We search for the standard model Higgs boson produced in association with a $Z$ boson using 4.8 fb$^{-1}$ of Tevatron $p\bar{p}$ collisions collected using the D0 detector. We consider final states consistent with the $Z$ boson decaying to leptons and the Higgs boson decaying to a $b\bar{b}$ quark pair. To improve the Higgs signal sensitivity we use the Matrix Element technique to calculate the probability that each event originates from a signal or background process, and include these probabilities as additional input variables to a multivariate analysis. [Preview Abstract] |
Sunday, May 1, 2011 9:18AM - 9:30AM |
G9.00005: Search for associated production of $W$/$Z$ and Higgs bosons in missing transverse energy plus $b$-quark jets final states at CDF Qiuguang Liu We present a search for the standard model Higgs boson produced in association with a $W$ or $Z$ boson at $\sqrt{s}$ = 1.96 TeV with the CDF II detector at the Fermilab Tevatron. The search is performed in events with a large imbalance in transverse energy, and one or two b-tagged jets using up to 5.8 fb$^{-1}$ of data. State-of-the-art techniques are used in the analysis to model the dominant QCD background and separate backgrounds from the signal. The validity of these techniques is illustrated by a measurement of top pair production using the same analysis tools. It is the first top pair measurement in events with large missing transverse energy and one or two $b$-quark tagged jets. The precisely measured top pair production strongly supports the Higgs searches performed in this channel. [Preview Abstract] |
Sunday, May 1, 2011 9:30AM - 9:42AM |
G9.00006: Search for associated production of a W and a Higgs Boson in $\ell\nu b\bar{b}$ final states at D0 Hatim Hegab A search for $WH$ production on $p\bar{p}$ collisions performed by the D0 collaboration at a center of mass energy of $\sqrt{s} = 1.96$ TeV is presented. Events selected for this analysis are required to have one lepton (electron or muon), missing transverse energy, and one or two $b$-tagged jets. Significant improvements to the sensitivity of the analysis to a Higgs signal have been made in the areas of lepton identification, $b$-jet identification, and separation of signal and multi-jet background. We describe these improvements and present upper limits on the Standard Model Higgs production cross section. [Preview Abstract] |
Sunday, May 1, 2011 9:42AM - 9:54AM |
G9.00007: Search for the Standard Model Higgs Boson in the $ZH\rightarrow\nu\nu$bb channel at D0 Abhinav Dubey We present a search for a low mass Standard Model Higgs boson produced in association with a $Z$ boson decaying invisibly into a pair of neutrinos at a center-of-mass energy of $\sqrt{s}=$1.96~TeV with the D0 detector at the Fermilab Tevatron collider. The final state is characterised by the presence of two $b$-tagged jets from the Higgs boson decay and a large imbalance in the transverse energy of the event. This channel is very powerful because of the large $Z\rightarrow\nu\nu$ branching ratio, but is experimentally very challenging because of the large QCD backgrounds and absence of visible leptons in the final state. The result with a data set up to 7.2~fb$^{-1}$ and recent improvements to the sensitivity will be discussed. [Preview Abstract] |
Sunday, May 1, 2011 9:54AM - 10:06AM |
G9.00008: Search for standard model Higgs boson production in association with a $W$ boson at CDF Martin Frank We present a search for a standard model Higgs boson produced in association with a $W$ boson using data collected with the CDF II detector from $p\bar p$ collisions at $\sqrt{s} = 1.96$ TeV. The search is performed in the ${WH \to l\nu b\bar{b}}$ channel. The two quarks usually fragment into two jets, but sometimes a third jet can be produced via gluon radiation, so we have increased our data sample by including events that contain three jets. We reconstruct the Higgs boson using two or three jets depending on the kinematics of the event. We find an improvement in our search sensitivity using the larger sample together with this multi-jet reconstruction technique. In the absence of an excess in data, we set an upper limit on the production rate times branching ratio. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700