Studies Into Tau Reconstruction Missing Transverse Energy And Photon Induced Processes With The Atlas Detector At The Lhc
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Studies Into Tau Reconstruction Missing Transverse Energy And Photon Induced Processes With The Atlas Detector At The Lhc
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Author : Robindra P. Prabhu
language : en
Publisher:
Release Date : 2011
Studies Into Tau Reconstruction Missing Transverse Energy And Photon Induced Processes With The Atlas Detector At The Lhc written by Robindra P. Prabhu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Lectures On Lhc Physics
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Author : Tilman Plehn
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-03-01
Lectures On Lhc Physics written by Tilman Plehn and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-03-01 with Science categories.
When trying to apply the solid knowledge of quantum field theory to actual LHC physics - in particular to the Higgs sector and certain regimes of QCD - one inevitably meets an intricate maze of phenomenological know-how, common lores and other, often historically grown intuition about what works and what not. These lectures are intended to be a brief but sufficiently detailed primer on LHC physics that will enable graduate students and any newcomer to the field to find their way through the more advanced literature as well as helping them to start work in this very timely and exciting field of research.
The Development Of Missing Transverse Momentum Reconstruction With The Atlas Detector Using The Pufit Algorithm In Pp Collisions At 13 Tev
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Author : Zhelun Li
language : en
Publisher:
Release Date : 2019
The Development Of Missing Transverse Momentum Reconstruction With The Atlas Detector Using The Pufit Algorithm In Pp Collisions At 13 Tev written by Zhelun Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Many interesting physical processes produce non-interacting particles that could only be measured using the missing transverse momentum. The increase of the proton beam intensity in the Large Hadron Collider (LHC) provides sensitivity to rare physics processes while inevitably increasing the number of simultaneous proton collisions in each event. The missing transverse momentum (MET) is a variable of great interest, defined as the negative sum of the transverse momentum of all visible particles. The precision of the MET determination deteriorates as the complexity of the recorded data escalates. Given the current complexity of data analysis, a new algorithm is developed to effectively determine the MET. Several well-understood physics processes were used to test the effectiveness of the newly designed algorithm. The performance of the new algorithm is also compared to that of the standard algorithm used in the ATLAS experiment.
Heavy Neutral Particle Decays To Tau Pairs
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Author : Michail Bachtis
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-12-13
Heavy Neutral Particle Decays To Tau Pairs written by Michail Bachtis and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-13 with Science categories.
The work presented in this thesis spans a wide range of experimental particle physics subjects, starting from level-1 trigger electronics to the final results of the search for Higgs boson decay and to tau lepton pairs. The thesis describes an innovative reconstruction algorithm for tau decays and details how it was instrumental in providing a measurement of Z decay to tau lepton pairs. The reliability of the analysis is fully established by this measurement before the Higgs boson decay to tau lepton pairs is considered. The work described here continues to serve as a model for analysing CMS Higgs to tau leptons measurements.
Search For Diphoton Events With Missing Transverse Energy With The Atlas Detector At The Lhc
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Author : Andrea Michelle Bangert
language : en
Publisher:
Release Date : 2011
Search For Diphoton Events With Missing Transverse Energy With The Atlas Detector At The Lhc written by Andrea Michelle Bangert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Z Tau H Tau Cross Section Measurement And Tautau Mass Reconstruction With The Atlas Detector At The Lhc
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Author :
language : en
Publisher:
Release Date : 2012
Z Tau H Tau Cross Section Measurement And Tautau Mass Reconstruction With The Atlas Detector At The Lhc written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
In this dissertation, the Z to tautau decay where one tau decays leptonically and the other one hadronically is presented. The process is studied with data collected from the ATLAS experiment in pp collisions at c-m-s = 7 TeV at the Large Hadron Collider (LHC). A first observation of the process and an initial measurement of its cross section is done with 36 pb-1 of data recorded during the 2010 run. The measured cross section value in the mass region 66-116~GeV is 857.6 +- 84.3(stat) +- 124.7(syst) +- 29.2(lumi) +- 2.8(theo) pb for the muon channel and 1142 +- 138.6(stat) +- 197.7(syst) +- 3...
Search For New Physics In Events With Same Sign Leptons And Missing Energy With Atlas At Lhc
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Author : Otilia-Anamaria Ducu
language : en
Publisher:
Release Date : 2015
Search For New Physics In Events With Same Sign Leptons And Missing Energy With Atlas At Lhc written by Otilia-Anamaria Ducu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
For the presented studies only the data recorded with the ATLAS detector is analyzed. The theoretical framework, the LHC collider and the ATLAS experiment are given in the first part of this thesis.At hadron colliders, the lepton identification and reconstruction are crucial for precise SM cross sections and coupling measurements or for new physics searches. Therefore, the second part of my thesis is dedicated to performance studies : in-situ measurements of electron identification and reconstruction efficiencies. The search for new physics is presented in the third part of the thesis. For these studies the channel with two same~- sign leptons and missing transverse energy is considered. The results are obtained with $L$~=~20 fb$^{-1}$ of data recorded at $sqrt s$ = 8 TeV and with the very first data at $sqrt s$ = 13 TeV. At the end of Run-1 no significant excess in data over the Standard Model prediction is observed and stringent limits on the supersymmetric particle masses are set. With the two same - sign leptons and jets final state it is also possible to measure directly the top quark Yukawa coupling using the ttbar + $H$ channel. This coupling is the largest in the Standard Model and it connects two of the heaviest particles predicted by the Standard Model, the top quark and the Higgs boson. In the fourth part of this thesis, a complete optimization is performed to reach the highest sensitivity for this signal in the two same~- sign leptons channel at $sqrt s$ = 13 TeV with 100 fb$^{-1}$ of data, corresponding to the end of Run-2.
Search For New Physics In Pp Collisions In Final States With Tau Leptons B Jets And Missing Transverse Momentum With The Atlas Detector In Lhc Run 2
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Author : Ferdinand Krieter
language : en
Publisher:
Release Date : 2021
Search For New Physics In Pp Collisions In Final States With Tau Leptons B Jets And Missing Transverse Momentum With The Atlas Detector In Lhc Run 2 written by Ferdinand Krieter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with Jets categories.
Search For New Physics In Diphoton And Missing Transverse Energy Final States Using The Atlas Detector At The Lhc
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Author : Martin Wildt
language : de
Publisher:
Release Date : 2012
Search For New Physics In Diphoton And Missing Transverse Energy Final States Using The Atlas Detector At The Lhc written by Martin Wildt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
A Study Of Missing Transverse Energy In Minimum Bias Events With In Time Pile Up At The Large Hadron Collider Using The Atlas Detector And S
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Author : Kuhan Wang
language : en
Publisher:
Release Date : 2011
A Study Of Missing Transverse Energy In Minimum Bias Events With In Time Pile Up At The Large Hadron Collider Using The Atlas Detector And S written by Kuhan Wang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
A sample of? L dt = 3.67 pb{-1} of minimum bias events observed using the ATLAS detector at the Large Hadron Collider at s=7 TeV is analyzed for Missing Transverse Energy (MET) response in the presence of in-time pile-up. We find that the MET resolution (ox, y) is consistent with a simple model of the detector response for minimum bias events, scaling with respect to the sum of the scalar energy ($\sum E_\text{T}$) as $\sigma_\text{X, Y}=A\sqrt{\sum E_\text{T} }$. This behavior is observed in the presence of in-time pile-up and does not vary with global calibration schemes. We find a bias in the mean ($\mu_\text{X, Y}$) of the MET that is linear with respect to $\sum E_\text{T}$, leading to an asymmetry in the $\phi_\text{X, Y}$ distribution of the MET. We propose an explanation for this problem in terms of a misalignment of the nominal center of the ATLAS detector with respect to its real center. We contrast the data with a Monte Carlo sample produced using PYTHIA. We find that the resolution, bias and asymmetry are all approximately reproduced in simulation.