Searching for Higgs Bosons in Tau Final States at Dzero
Lead Research Organisation:
University of Manchester
Department Name: Physics and Astronomy
Abstract
The Dzero Experiment at the Tevatron collider near Chicago searches for Higgs bosons produced in the collisions of protons and anti-protons. In this proposal we want to use tau leptons as an efficient tool to identify events with Higgs boson production and to separate them from the copiously produced background. In the Standard Model of Particle Physics, Higgs bosons can be produced together with a W or Z boson. Whereas the Higgs boson will decay into a pair of b quarks, the W can decay into a tau and a neutrino and the Z into two tau leptons. This is only one of several possible production processes. The expected number of Standard Model Higgs bosons in the data, however, is so small that this process plays an important role in increasing the sensitivity for a signal. In Supersymmetry there are several Higgs bosons. In the so-called Minimal Supersymmetric Standard Model (MSSM) there are five Higgs bosons, two of them charged and three neutral. About one in ten MSSM Higgs bosons decays into a pair of tau leptons. Searching for these events can help to discover Supersymmetry. In any case, it will significantly constrain the properties of the model. The other Tevatron experiment, CDF, has recently presented a deviation in its data which could be interpreted as a potential signal of a MSSM Higgs boson. The Dzero data could not confirm this signal, but also not completely exclude it. It is therefore important that we continue this work in the future.
Publications
Takahashi, M
(2009)
Search for the Standard Model Higgs Boson in p(p)over-bar Collisions at root s=1.96 TeV
in SUSY09: THE 17TH INTERNATIONAL CONFERENCE ON SUPERSYMMETRY AND THE UNIFICATION OF FUNDAMENTAL INTERACTIONS
Abazov, Victor Mukhamedovich
(2010)
Search for resonant WW and WZ production in ppbar collisions at ?s = 1.96 TeV
Abazov, Victor Mukhamedovich
(2011)
Search for the Standard Model Higgs Boson in the $H \to WW \to \ell \ny q^\prime \barq$ Decay Channel
Abazov VM
(2010)
Search for the standard model higgs Boson in the ZH-->nunubb channel in 5.2 fb{-1} of pp collisions at sqrt[s]=1.96 TeV.
in Physical review letters
Abazov VM
(2009)
Measurement of dijet angular distributions at square root(s) = 1.96 TeV and searches for quark compositeness and extra spatial dimensions.
in Physical review letters
Abazov VM
(2011)
Determination of the width of the top quark.
in Physical review letters
Abazov VM
(2009)
Search for the standard model Higgs boson in tau final states.
in Physical review letters
Abazov VM
(2010)
Search for ZH ? l+ l- bb production in 4.2 fb(-1) of pp collisions at sqrt[s] =1 .96 TeV.
in Physical review letters
Abazov VM
(2009)
Search for dark photons from supersymmetric hidden valleys.
in Physical review letters
Description | Fermilab International Fellowship |
Organisation | Fermilab - Fermi National Accelerator Laboratory |
Department | Particle Physics Division |
Country | United States |
Sector | Public |
PI Contribution | We collaborate on the D0 Experiment at Fermilab. |
Collaborator Contribution | Collaboration on D0 Experiment |
Impact | see list of publications attached |
Start Year | 2009 |
Description | Fermilab Today, Press |
Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
Part Of Official Scheme? | No |
Primary Audience | Public/other audiences |
Results and Impact | - Maiko Takahashi was featured several times on Fermilab Today, an outreach webpage - Higgs search results from D0 were featured in media (e.g. BBC) - Significant feedback from public regarding the Tevatron Higgs searches, including the discussion about a run extension of the Tevatron. |
Year(s) Of Engagement Activity | 2009,2010 |