Investigation Of The Discovery Potential Of A Higgs Boson In The Tt H0 H0 Bb Channel With The Atlas Experiment
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Investigation Of The Discovery Potential Of A Higgs Boson In The Tt H0 H0 Rightarrow Bb Channel With The Atlas Experiment
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Author :
language : en
Publisher:
Release Date : 2010
Investigation Of The Discovery Potential Of A Higgs Boson In The Tt H0 H0 Rightarrow Bb Channel With The Atlas Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
The 10th International Conference On Supersymmetry And Unification Of Fundamental Interactions
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Author : Pran Nath
language : en
Publisher:
Release Date : 2002
The 10th International Conference On Supersymmetry And Unification Of Fundamental Interactions written by Pran Nath and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Grand unified theories (Nuclear physics) categories.
1997 Cern School Of Computing
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Author :
language : en
Publisher:
Release Date : 1997
1997 Cern School Of Computing written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Particles (Nuclear physics) categories.
Sixth International Conference Of The Balkan Physical Union
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Author : Balkan Physical Union. International Conference
language : en
Publisher: American Institute of Physics
Release Date : 2007-05-15
Sixth International Conference Of The Balkan Physical Union written by Balkan Physical Union. International Conference and has been published by American Institute of Physics this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-05-15 with Science categories.
This book contains the proceedings of the Sixth International Conference of the Balkan Physical Union (BPU-6), held in Istanbul, Turkey, in August 2006. The BPU-6 Conference covers the most important results and trends in physics, including: Nuclear physics and nuclear energy, gravitation and cosmology, alternative sources of energy, econophysics, biophysics and medical physics, history of philosophy of physics, meteorology and instrumentation.
Investigation Of The Discovery Potential Of A Higgs Boson In The Tt H0 H0 Bb Channel With The Atlas Experiment
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Author : C. Bernius
language : en
Publisher:
Release Date : 2010
Investigation Of The Discovery Potential Of A Higgs Boson In The Tt H0 H0 Bb Channel With The Atlas Experiment written by C. Bernius and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
The production of a light Standard Model Higgs boson in association with a top-quark pair at the Large Hadron Collider (LHC) is studied in a simulation of the multipurpose ATLAS experiment. The Higgs boson is assumed to decay into a b\bar{b} pair, and the top-quark pair to decay semi-leptonically. The main background process for this channel is the production of t\bar{t} events, which can be divided into reducible and irreducible components. In the process of generating these components separately, an overlap of events is created through the addition of b-quarks to t\bar{t} events via parton showering in the t\bar{t}X sample. These events are already included in the matrix-element cross-section calculation for the t\bar{t}b\bar{b} sample. A new procedure for the overlap removal is presented in this thesis. Two analyses are studied, where one aims at the full reconstruction of the nal state using a cut-based approach. Recently, this way of reconstructing the t\bar{t}H {o}(H {o}\rightarrow b\bar{b}) process has been found to be extremely challenging. The other analysis is based on a new method employing state-of-the-art jet reconstruction and decomposition techniques where the t\bar{t} pair and the Higgs boson are required to have large transverse momenta and can therefore be reconstructed as massive Higgs and top jets. A recent phenomenological study has shown that the t\bar{t}H {o} process can be recovered as a promising search channel for a low mass Standard Model Higgs boson around 120 GeV using this approach. Finally, to enhance the sensitivity of the t\bar{t}H {o} channel, a combination of the two analyses is presented.
Identification Of B Jets And Investigation Of The Discovery Potential Of A Higgs Boson In The Wh L Bb Wh L Nu B B Channel With The Atlas Experiment
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Author : Nicola Giacinto Piacquadio
language : en
Publisher:
Release Date : 2009
Identification Of B Jets And Investigation Of The Discovery Potential Of A Higgs Boson In The Wh L Bb Wh L Nu B B Channel With The Atlas Experiment written by Nicola Giacinto Piacquadio and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Search For The Higgs Boson In The Tth H Bb Channel And The Identification Of Jets Containing Two B Hadrons With The Atlas Experiment
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Author : Royer Edson Ticse Torres
language : en
Publisher:
Release Date : 2016
Search For The Higgs Boson In The Tth H Bb Channel And The Identification Of Jets Containing Two B Hadrons With The Atlas Experiment written by Royer Edson Ticse Torres and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
In July 2012, CERN announced the discovery of the Higgs boson, the last missing piece of the Standard Model (SM). The Higgs boson was observed in different channels. Precise measurement of its properties is now very important to investigate for possible deviations from the SM. This thesis presents a search for the Higgs boson produced in association with top quarks and decaying to a b quark pair, the ttH(H→bb) channel, using proton-proton collisions at √s = 13 TeV, collected with the ATLAS detector in 2015 and 2016. This document details in particular the full reconstruction of the ttH(H→bb) system and the discrimination between signal and the main background, tt+jets. The ttbb is a subset of the tt+jets backgrounds recent studies show that there is a large fraction of ttbb events with jets containing two b-hadrons. A new algorithm has been developed to discriminate such jets from single b-hadrons jets. The description of this tool is presented in this thesis.
The Beauty And The Boost A Higgs Boson Tale
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Author : Brian Moser
language : en
Publisher: Springer Nature
Release Date : 2023-09-19
The Beauty And The Boost A Higgs Boson Tale written by Brian Moser and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-09-19 with Science categories.
Precision measurements of the Higgs boson’s properties are a powerful tool to look for deviations from the predictions of the Standard Model (SM) of particle physics. The 139/fb of proton-proton collision data which have been collected by the ATLAS experiment during Run 2 of the LHC, offer an opportunity to investigate rare Higgs-boson topologies, which are particularly sensitive to new physics scenarios but experimentally difficult to access. Several such measurements, which target Higgs-boson decays to heavy-flavour quarks, as well as their combinations are presented in this thesis. A novel analysis that measures Higgs-boson production in association with a heavy vector boson V (VH, with V=W,Z) at high energies is presented. Dedicated Higgs-boson reconstruction techniques are applied to reconstruct the highly Lorentz-boosted Higgs-boson decays into pairs of bottom quarks. The measurement is subsequently combined with a VH cross-section measurement at low and intermediate pT(V) to provide a differential cross-section measurement in kinematic fiducial volumes over the largest possible pT(V) range. All cross-section measurements agree with the SM predictions within relative uncertainties that range from 30% to 300%. The results are furthermore interpreted as limits on the parameters of a SM effective field theory. Finally, a combination of measurements of Higgs decays to heavy-flavour quarks is used to experimentally determine that the Higgs-boson coupling to charm quarks is weaker than to bottom quarks, as predicted by the SM. The target audience for the thesis are physicists and physics students, in particular those with a background in high energy physics.
Discovery And Measurement Of The Higgs Boson In The Ww Decay Channel
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Author : David Hall
language : en
Publisher: Springer
Release Date : 2015-06-15
Discovery And Measurement Of The Higgs Boson In The Ww Decay Channel written by David Hall and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-06-15 with Science categories.
This thesis describes the stand-alone discovery and measurement of the Higgs boson in its decays to two W bosons using the Run-I ATLAS dataset. This is the most precise measurement of gluon-fusion Higgs boson production and is among the most significant results attained at the LHC. The thesis provides an exceptionally clear exposition on a complicated analysis performed by a large team of researchers. Aspects of the analysis performed by the author are explained in detail; these include new methods for evaluating uncertainties on the jet binning used in the analysis and for estimating the background due to associated production of a W boson and an off-shell photon. The thesis also describes a measurement of the WW cross section, an essential background to Higgs boson production. The primary motivation of the LHC was to prove or disprove the existence of the Higgs boson. In 2012, CERN announced this discovery and the resultant ATLAS publication contained three decay channels: gg, ZZ, and WW.
The Identification Of Hadronically Decaying Tau Leptons In The Atlas Experiment And Investigation Of The Discovery Potential For Mssm Higgs Bosons In Tau Final States
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Author : Michael Heldmann
language : en
Publisher:
Release Date : 2007
The Identification Of Hadronically Decaying Tau Leptons In The Atlas Experiment And Investigation Of The Discovery Potential For Mssm Higgs Bosons In Tau Final States written by Michael Heldmann and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.