Development Of Pixel Detector For Atlas Inner Tracker Itk Upgrade At Hl Lhc And Searching For The Standard Model Higgs Boson Decay Into B Quark Pair With Atlas Experiment
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Development Of Pixel Detector For Atlas Inner Tracker Itk Upgrade At Hl Lhc And Searching For The Standard Model Higgs Boson Decay Into B Quark Pair With Atlas Experiment
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Author : Tasneem Saleem
language : en
Publisher:
Release Date : 2019
Development Of Pixel Detector For Atlas Inner Tracker Itk Upgrade At Hl Lhc And Searching For The Standard Model Higgs Boson Decay Into B Quark Pair With Atlas Experiment written by Tasneem Saleem 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.
ATLAS is one of the two main experiments at LHC with the purpose of investigating the microscopic properties of matter to address the most fundamental questions of particle physics. After the achievements of the first years of running, the potential reach for new discoveries and precise measurements at LHC is being extended by pushing further the energy and luminosity frontiers through three upgrades of the accelerator culminating in the High Luminosity LHC (HL-LHC). To fully profit from the increased luminosity, two main upgrades of the ATLAS inner detector are planned. The first upgrade was already completed at the beginning of 2015 with the insertion of the IBL, a fourth pixel layer located at just 3.2 cm from the beam line. In the second major upgrade, foreseen for 2024, the full inner detector will be replaced by a completely new inner tracker fully made of silicon devices to cope with the high particle density and the harsh radiation environment at the HL-LHC, which during its operational period will deliver 3000 fb-1, almost ten times the integrated luminosity of the full LHC program. This thesis addresses the study of new n+-in-p active edge pixel detectors by developing two novel doping profile analysis methods to study the radiation damage effects on the pixel detectors performance. These methods are the 3D sims imaging method and the TLM Method. TCAD simulation has been used to simulate the doping profiles, the electrical behavior and the radiation damage. Validating the simulation models with data have been done. Moreover, clean-room characterization, as well as testbeam measurement have been performed to test the different detector designs. In the second part of the thesis, I discuss the observation of the standard model Higgs boson bb decay mode using the data collected by ATLAS during the LHC Run2 at center-of-mass energy 13 TeV and an integrated luminosity 79.8 fb−1 of a proton-proton collision. I contributed specifically to the search of the standard model Higgs boson in VH(bb) production mode. In the VH(bb) analysis we don't have any channel that considers the tau leptons in the final state. I have performed a feasibility study to verify the gain of using the taus in the analysis. In addition, for the VH(bb) analysis I have worked on the multi-jet background estimation in the 1-lepton channel using the dijet-mass analysis method.
Cosmoparticle Physics
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Author : Maxim Yu Khlopov
language : en
Publisher: World Scientific
Release Date : 1999
Cosmoparticle Physics written by Maxim Yu Khlopov and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Science categories.
Since the 1980s the cross-disciplinary, multidimensional field of links between cosmology and particle physics has been widely recognised by theorists, studying cosmology, particle and nuclear physics, gravity, as well as by astrophysicists, astronomers, space physicists, experimental particle and nuclear physicists, mathematicians and engineers.The relationship between cosmology and particle physics is now one of the important topics of discussion at any scientific meeting both on astrophysics and high energy physics.Cosmoparticle physics is the result of the mutual relationship between cosmology and particle physics in their search for physical mechanisms of inflation, baryosynthesis, nonbaryonic dark matter, and for fundamental unity of the natural forces underlying them. The set of nontrivial links between cosmological consequences of particle models and the astrophysical data on matter and radiation in the modern universe maintains cosmoarcheology, testing self-consistently particular predictions of particle models on the base of cosmological scenarios, following from them. Complex analysis of all the indirect cosmological, astrophysical and microphysical phenomena makes cosmoparticle physics the science of the world and renders quantitatively definite the correspondence between its micro- and macroscopic structure.This book outlines the principal ideas of the modern particle theory and cosmology, their mutual relationship and the nontrivial correspondence of their physical and astrophysical effects.
The Large Hadron Collider
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Author : Lyndon R. Evans
language : en
Publisher: EPFL Press
Release Date : 2009-01-01
The Large Hadron Collider written by Lyndon R. Evans and has been published by EPFL Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-01-01 with Hadron colliders categories.
Describes the technology and engineering of the Large Hadron collider (LHC), one of the greatest scientific marvels of this young 21st century. This book traces the feat of its construction, written by the head scientists involved, placed into the context of the scientific goals and principles.
Electroweak Interactions And Unified Theories
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Author : J. Thanh Van Tran
language : en
Publisher: Atlantica Séguier Frontières
Release Date : 1988
Electroweak Interactions And Unified Theories written by J. Thanh Van Tran and has been published by Atlantica Séguier Frontières this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Dark matter (Astronomy) categories.
Particle Dark Matter
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Author : Gianfranco Bertone
language : en
Publisher: Cambridge University Press
Release Date : 2010-01-07
Particle Dark Matter written by Gianfranco Bertone and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-01-07 with Science categories.
Dark matter is among the most important open problems in modern physics. Aimed at graduate students and researchers, this book describes the theoretical and experimental aspects of the dark matter problem in particle physics, astrophysics and cosmology. Featuring contributions from 48 leading theorists and experimentalists, it presents many aspects, from astrophysical observations to particle physics candidates, and from the prospects for detection at colliders to direct and indirect searches. The book introduces observational evidence for dark matter along with a detailed discussion of the state-of-the-art of numerical simulations and alternative explanations in terms of modified gravity. It then moves on to the candidates arising from theories beyond the Standard Model of particle physics, and to the prospects for detection at accelerators. It concludes by looking at direct and indirect dark matter searches, and the prospects for detecting the particle nature of dark matter with astrophysical experiments.
Search For Higgs Boson Decays To Charm Quarks With The Atlas Experiment And Development Of Novel Silicon Pixel Detectors
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Author : Maria Mironova
language : en
Publisher:
Release Date : 2023
Search For Higgs Boson Decays To Charm Quarks With The Atlas Experiment And Development Of Novel Silicon Pixel Detectors written by Maria Mironova and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023 with categories.
This book explores the Higgs boson and its interactions with fermions, as well as the detector technologies used to measure it. The Standard Model of Particle Physics has been a groundbreaking theory in our understanding of the fundamental properties of the universe, but it is incomplete, and there are significant hints which require new physics. The discovery of the Higgs boson in 2012 was a substantial confirmation of the Standard Model, but many of its decay modes remain elusive. This book presents the latest search for Higgs boson decays into c-quarks using a proton-proton collision dataset collected by the ATLAS experiment at the Large Hadron Collider (LHC). This decay mode has yet to be observed and requires advanced machine learning algorithms to identify c-quarks in the experiment. The results provide an upper limit on the rate of Higgs boson decays to c-quarks and a direct measurement of the Higgs boson coupling strength to c-quarks. The book also discusses the future of particle physics and the need for significant improvements to the detector to cope with increased radiation damage and higher data rates at the High-Luminosity LHC. It presents the characterization of the ATLAS pixel detector readout chip for the inner detector upgrade (ITk). The chip was subjected to irradiations using X-rays and protons to simulate the radiation environment at the HL-LHC. The tests showed that all readout chip components, including the digital logic and analogue front-end, are sufficiently radiation-tolerant to withstand the expected radiation dose. Finally, this book describes monolithic pixel detectors as a possible technology for future pixel detectors. This book is ideal for individuals interested in exploring particle physics, the Higgs boson, and the development of silicon pixel detectors.
Upgrade Of The Atlas Experiment Inner Tracker And Related Physics Perspectives Of The Higgs Boson Decay Into Two B Quarks
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Author : Audrey Ducourthial
language : en
Publisher:
Release Date : 2018
Upgrade Of The Atlas Experiment Inner Tracker And Related Physics Perspectives Of The Higgs Boson Decay Into Two B Quarks written by Audrey Ducourthial and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
By 2027, the LHC will enter its high luminosity regime, providing protons protons collisions at an unprecedented rate. The LHC experiments whill have to be upgraded to cope with this higher data rate. The new ATLAS Inner Tracker (ITk) will allow a better identification of b-quarks and interesting physics signature with b-quarks in the final states such as the Higgs trilinear coupling will be reachable. The work performed during this thesis consisted in testing planar pixel sensors for the ITk, as well as optimizing b-tagging algorithms. In parallel, a study on the radiation damage on silicon pixel sensors have been performed. The radiation hardness of silicon sensors plays a determinant role as it allows them to be efficient in the highly radiative environment at LHC. Understanding the impact of radiation in silicon sensors is a major challenge and a radiation damage digitizer which models radiation damage effects in ATLAS Monte Carlo simulations is currently developed by the ATLAS experiment. Three ITk silicon planar pixel sensors productions of LPNHE and FBK have been developed, produced and tested on beam. Sensors from these three productions aim to be part of the ITk and have to demonstrate good performance after being irradiated at high fluences. Several technological designs have been investigated, such as temporary metal biasing option and active edges which maximize the geometrical acceptance of the sensors. The optimization of b-tagging SV1 algorithm (a secondary-vertex based algorithm) will be pre- sented as well as a study on the extrapolation of b-tagging performances at high pT.
Pixel Detector Studies For The Atlas Itk Upgrade For The Hl Lhc
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Author : Silke Möbius
language : en
Publisher:
Release Date : 2023
Pixel Detector Studies For The Atlas Itk Upgrade For The Hl Lhc written by Silke Möbius and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023 with categories.
The integrated luminosity of the Large Hadron Collider (lhc), which is proportional to the number of particles colliding and thus data being collected, is planned to be increased by a factor of 5-7.5 compared to the design luminosity of the lhc by the end of the 2020s. This step is motivated by the potential to measure Standard Model physics processes especially in the top quark and Higgs sector with high precision and discover new physics. However, this upgrade to the High Luminosity-lhc will result in an increased particle density in the experiments, causing a higher hit occupancy in the ...
Development Of The Detector Readout For The Atlas Phase Ii Itk Pixel Detector
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Author : Wael Alkakhi
language : en
Publisher:
Release Date : 2025
Development Of The Detector Readout For The Atlas Phase Ii Itk Pixel Detector written by Wael Alkakhi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025 with categories.
During the HL-LHC upgrade, a high luminosity upgrade takes place, where the instantaneous luminosity will reach 7.5 × 10^(34) cm^(-2)s^(-1) in Run 4. The current inner detector of the ATLAS experiment will be replaced by an all-silicon detector called the Inner Tracker (ITk). The ITk comprises a pixel detector surrounded by a strip detector. The pixel detector consists of five layers, with the first two layers forming the inner system and the last three layers forming the outer barrel and the endcap. Due to the large number of components, a database named the ITk production database (ITk PD...
Development Of Pixel Module Assembly Processes For The Phase 2 Upgrade Of The Atlas Detector And Test Beam Measurements With Diamond Pixel Detectors
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Author : Helge Christoph Beck
language : en
Publisher:
Release Date : 2019
Development Of Pixel Module Assembly Processes For The Phase 2 Upgrade Of The Atlas Detector And Test Beam Measurements With Diamond Pixel Detectors written by Helge Christoph Beck 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.
One of the most powerful machines to study particle physics is the Large Hadron Collider (LHC). Starting in 2024, it will be upgraded to the High Luminosity-LHC (HL-LHC) to deliver even more data to measure with high precision Standard Model (SM) physics processes, and to maximise the potential to discover new physics. Higher luminosity implies a higher radiation environment, which poses challenges to the detectors of the experiments. To deal with radiation damage, pile up, and needed read-out speed, ATLAS will replace its current tracking detector with the new Inner Tracker (ITk). The inne...