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
Aaltonen T
(2010)
Combination of Tevatron searches for the standard model Higgs boson in the W+W- decay mode.
in Physical review letters
Abazov V
(2010)
Double parton interactions in ? + 3 jet events in p p ¯ collisions at s = 1.96 TeV
in Physical Review D
Abazov V
(2010)
Search for the rare decay B s 0 ? µ + µ -
in Physics Letters B
Abazov V
(2010)
Measurement of direct photon pair production cross sections in p p ¯ collisions at s = 1.96 TeV
in Physics Letters B
Abazov V
(2010)
b-Jet identification in the D0 experiment
in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Abazov V
(2010)
Evidence for an anomalous like-sign dimuon charge asymmetry
in Physical Review D
Abazov V
(2009)
Measurement of trilinear gauge boson couplings from W W + W Z ? l ? j j events in p p ¯ collisions at s = 1.96 TeV
in Physical Review D
Abazov V
(2011)
Measurement of three-jet differential cross sections d s 3 jet / d M 3 jet in p p ¯ collisions at s = 1.96 TeV
in Physics Letters B
Abazov V
(2011)
Measurement of color flow in t t ¯ events from p p ¯ collisions at s = 1.96 TeV
in Physical Review D
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 |