Conveners
Parallel 2C: Higgs
- Session chair: Dr. Jon Hays
Carl Jeske
(University of Warwick)
4/8/14, 4:00 PM
The Energy Frontier Programme
contributed talk
I will present results of a search for the 125 GeV Higgs boson decaying to a pair of tau leptons. The dataset used is 20.3fb$^{-1}$ of proton-proton collision recorded by the ATLAS detector at a centre of mass energy of 8 TeV. The observed (expected) deviation from the background only hypothesis corresponds to a significance of 4.1 (3.2) standard deviations. The measured signal strength is...
Ludovica Aperio Bella
(University of Birmingham (GB))
4/8/14, 4:15 PM
The Energy Frontier Programme
contributed talk
This contribution will review the latest ATLAS results on the properties of the Higgs boson in the decay channel $H\rightarrow ZZ\rightarrow 4\ell$ using approximately 25 fb-1 of pp collision data collected during the LHC Run1 at 7 TeV and 8 TeV. The measurements of the mass and the couplings of the newly discovered boson are presented together with the spin-parity analysis results.
Matthew Ian Jackson
(University of Liverpool (GB))
4/8/14, 4:30 PM
The Energy Frontier Programme
contributed talk
Since its discovery a large effort has been made to improve analyses and confirm the properties of the Higgs Boson. At a mass of 125 GeV Higgs to $b\bar{b}$ is the dominant decay mode, however large QCD backgrounds prevent direct analysis, instead an analysis of Higgs to $b\bar{b}$ is considered where the Higgs is produced in association with a Vector Boson ($W$/$Z$). A brief overview of this...
Ian Allan Connelly
(Royal Holloway, University of London)
4/8/14, 4:45 PM
The Energy Frontier Programme
contributed talk
With the expected reach of ttH(H$\to$bb) not quite approaching Standard Model sensitivity, it is important to squeeze as much information out of the data as possible. The matrix element method calculates the probability of an event coming from signal (ttH) and background (ttbb) decay process by calculating the most likely kinematics of the hard scattering partons and comparing with the...
Manuel Proissl
(University of Edinburgh (GB))
4/8/14, 5:00 PM
The Energy Frontier Programme
contributed talk
An updated direct search for a Standard Model Higgs boson decaying into pairs of $b$ quarks in association with a W or Z boson using the ATLAS detector at the LHC is presented. The search is performed in the three decay modes $ZH\rightarrow\nu\nu b\bar{b}$, $WH\rightarrow\ell\nu b\bar{b}$ and $ZH\rightarrow\ell\ell b\bar{b}$ with $\ell$ denoting either electrons or muons and has to cope with...
Ines Ochoa
(University of London (GB))
4/8/14, 5:15 PM
The Energy Frontier Programme
contributed talk
One of the main results of the Large Hadron Collider Run I was the discovery of the Higgs boson by ATLAS and CMS experiments. The boson has been discovered with a mass of around 125 GeV and all measurements performed so far are compatible with the Standard Model predictions.
However, clear evidence of the boson decaying to a pair of $b$-quarks has not been observed yet, despite it being...
Benedict Allbrooke
(University of Birmingham (GB))
4/8/14, 5:30 PM
The Energy Frontier Programme
contributed talk
The most recent published results for the ATLAS search for a Standard Model Higgs Boson decaying to bb in association with a W boson will be presented. The Higgs decay to bb is a crucial test of the Standard Model Higgs Boson but the search must be made in associated production modes. The search has been performed using 4.7 fb$^{-1}$ of data collected at $\sqrt{s}$=7TeV and 20.3 fb$^{-1}$ at...
Thomas Olivier Ravenscroft
(University of Glasgow (GB))
4/8/14, 5:45 PM
The Energy Frontier Programme
contributed talk
Presented is a method to improve the b-jet energy resolution with the task of increasing the signal sensitivity in searches decaying to a b, anti-b quark pair in the final state. The machinery has been tested using Monte Carlo simulated samples in the process $WH \rightarrow l\nu bb$. The method trains a function through regression applying a correction factor to bring the reconstructed jet...
Rebecca Charlotte Lane
(Imperial College Sci., Tech. & Med. (GB))
4/8/14, 6:00 PM
The Energy Frontier Programme
contributed talk
A search for the standard model Higgs boson decaying into a pair of tau leptons is presented, using data recorded by the CMS experiment in 2011 and 2012. The analysis includes all 6 possible final states of the two taus, each of which decays either hadronically or leptonically into an electron or muon. An excess of events over the expected contribution from backgrounds is observed,...
João Pela
(Imperial College Sci., Tech. & Med. (GB))
4/8/14, 6:15 PM
The Energy Frontier Programme
contributed talk
All measurements of the 125 GeV boson to date indicate compatibility with a SM Higgs boson, but the associated uncertainties are large, and the possibility for non-SM properties remains. In addition, although additional SM-like Higgs bosons have been excluded over a wide mass range, additional Higgs bosons with exotic decay modes remains a possibility, and are predicted by many models....
