Measurement Of Multi Jet Production In Proton Proton Collisions At 7 Tev Center Of Mass Energy And Hadronic Calibration Studies With The Atlas Detector At Cern
DOWNLOAD
Download Measurement Of Multi Jet Production In Proton Proton Collisions At 7 Tev Center Of Mass Energy And Hadronic Calibration Studies With The Atlas Detector At Cern PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Measurement Of Multi Jet Production In Proton Proton Collisions At 7 Tev Center Of Mass Energy And Hadronic Calibration Studies With The Atlas Detector At Cern book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Measurement Of The Inclusive Jet Cross Section With The Atlas Detector At The Large Hadron Collider
DOWNLOAD
Author : Caterina Doglioni
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-07-28
Measurement Of The Inclusive Jet Cross Section With The Atlas Detector At The Large Hadron Collider written by Caterina Doglioni 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 2012-07-28 with Science categories.
Tests of the current understanding of physics at the highest energies achievable in man-made experiments are performed at CERN’s Large Hadron Collider. In the theory of the strong force within the Standard Model of particle physics - Quantum ChromoDynamics or QCD - confined quarks and gluons from the proton-proton scattering manifest themselves as groups of collimated particles. These particles are clustered into physically measurable objects called hadronic jets. As jets are widely produced at hadron colliders, they are the key physics objects for an early "rediscovery of QCD". This thesis presents the first jet measurement from the ATLAS Collaboration at the LHC and confronts the experimental challenges of precision measurements. Inclusive jet cross section data are then used to improve the knowledge of the momentum distribution of quarks and gluons within the proton and of the magnitude of the strong force.
Measurement Of Multi Jet Production In Proton Proton Collisions At 7 Tev Center Of Mass Energy And Hadronic Calibration Studies With The Atlas Detector At Cern
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2011
Measurement Of Multi Jet Production In Proton Proton Collisions At 7 Tev Center Of Mass Energy And Hadronic Calibration Studies With The Atlas Detector At Cern written by 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.
Search For Supersymmetry In Dijet And Multijet Channels And Soft Qcd Measurements Using The Atlas Detector At The Large Hadron Collider
DOWNLOAD
Author : Rishiraj Pravahan
language : en
Publisher:
Release Date : 2010
Search For Supersymmetry In Dijet And Multijet Channels And Soft Qcd Measurements Using The Atlas Detector At The Large Hadron Collider written by Rishiraj Pravahan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Particles (Nuclear physics) categories.
The ATLAS experiment at the CERN Large Hadron Collider (LHC) has collected a substantial amount of data to understand the Standard Model of particle physics at higher than previous center of mass energy available and to explore new physics beyond the Standard Model. This dissertation describes observations of charged particle multiplicity distributions in 7 TeV and 900 GeV data as well as searches for new physics with a signature of high energy jets and missing transverse energy using the first few months of data available at the LHC. Multiplicity distributions of charged particle tracks, one of the first observables in high energy collisions were made for a center of mass energy, sqrt (s) = 900 GeV as well as 7 TeV proton-proton collision data. Such distributions help to understand multi-particle production processes. One of the predicted features of multiplicity distribution and its moments is KNO scaling which implies that the shape and moments of the scaled multiplicity distribution is independent of the center-of-mass energy. Although a clear violation of KNO scaling is not observed within the error limits, an indication of such violation is noted. Different models of hadro-production to describe multiplicity distributions are also studied. The Negative Binomial Distribution (NBD) is an often used distribution modeling multiplicity distributions. It has been observed that NBD is satisfied in different types of collisions and over wide range of energies and it was observed that not only the full-phase-space multiplicity distribution can be successfully fitted by the NBD but also the distribution within central pseudo-rapidity intervals. Based on these findings, the model of cluster (or clan) cascading type has been proposed. Although, a good NBD fit can be obtained, it is observed for hadronic interactions that the presence of two weighted NBD or Double NBD (DNBD) components, one corresponding to soft production and the other to semi-hard one (mini-jets) seems to fit the data better for broad pseudo-rapidity ranges. It was found that the soft component follows KNO scaling while the semi-hard component does not. The proton-proton collision data at LHC has been analyzed to test the NBD and DNBD parametrization and test the energy dependence of the fitted parameters. It is well understood that the Standard model of Particle physics in incomplete. Our knowledge of cosmology also leaves several crucial questions unanswered, one of them being the composition of the dark matter that has been indirectly observed through astronomical observations. The primary objectives for constructing the Large Hadron Collider has been to solve these problems through the discovery of the Higgs particle and to find new physics processes that predict the production of massive non-interacting stable particles. Searches of such new physics producing heavy stable particles in its final state has been performed. Finding such signals would provide direct observation of a dark matter candidate particle. The exclusive event topology of two high energy jets and missing transverse energy has been explored to perform the above search, using ATLAS detector data. A summary of results of these preliminary searches in comparison with theoretical predictions has been presented. In order to understand and discriminate any new physics, a clear and coherent understanding of the detector response is crucial. Moreover, a detailed knowledge of the behavior of known standard model phenomena is required. A detailed description of the ATLAS detector and several important calibration techniques is discussed and their results summarized. Estimates of Standard Model physics, contributing to irreducible backgrounds to dark matter searches is presented in detail. One such physics process constituting an irreducible background is the production of the Z boson decaying into two neutrinos ([nu]) with associated jets. The observation of these events directly from data is an impossible task due to the non-interacting nature of the neutrinos. An estimate of the production cross section of these process is estimated using observations of photon ([gamma]) plus jet events and theoretical predictions. Estimated numbers for the [gamma] plus 2,3,4 and more associated jets production with uncertainties has been summarized.
Measurement Of Multi Jet Production Cross Section At A Center Of Mass Energy Of 7 Tev At The Large Hadron Collider With The Atlas Detector
DOWNLOAD
Author : David Lopez Mateos
language : en
Publisher:
Release Date : 2011
Measurement Of Multi Jet Production Cross Section At A Center Of Mass Energy Of 7 Tev At The Large Hadron Collider With The Atlas Detector written by David Lopez Mateos and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Monte Carlo method categories.
Measurement Of Hadronic Event Shapes And Jet Substructure In Proton Proton Collisions At 7 0 Tev Center Of Mass Energy With The Atlas Detector At The Large Hadron Collider
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2012
Measurement Of Hadronic Event Shapes And Jet Substructure In Proton Proton Collisions At 7 0 Tev Center Of Mass Energy With The Atlas Detector At The Large Hadron Collider 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.
This thesis presents the first measurement of 6 hadronic event shapes in proton-proton collisions at a center-of-mass energy of √s = 7 TeV using the ATLAS detector at the Large Hadron Collider. Results are presented at the particle-level, permitting comparisons to multiple Monte Carlo event generator tools. Numerous tools and techniques that enable detailed analysis of the hadronic final state at high luminosity are described. The approaches presented utilize the dual strengths of the ATLAS calorimeter and tracking systems to provide high resolution and robust measurements of the hadronic jets that constitute both a background and a signal throughout ATLAS physics analyses. The study of the hadronic final state is then extended to jet substructure, where the energy flow and topology within individual jets is studied at the detector level and techniques for estimating systematic uncertainties for such measurements are commissioned in the first data. These first substructure measurements in ATLAS include the jet mass and sub-jet multiplicity as well as those concerned with multi-body hadronic decays and color flow within jets. Finally, the first boosted hadronic object observed at the LHC - the decay of the top quark to a single jet - is presented.
Measurement Of Hadronic Event Shapes And Jet Substructure In Proton Proton Collisions At 7 0 Tev Center Of Mass Energy With The Atlas Detector At The Large Hadron Collider
DOWNLOAD
Author : David Wilkins Miller
language : en
Publisher:
Release Date : 2011
Measurement Of Hadronic Event Shapes And Jet Substructure In Proton Proton Collisions At 7 0 Tev Center Of Mass Energy With The Atlas Detector At The Large Hadron Collider written by David Wilkins Miller 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.
This thesis presents the first measurement of 6 hadronic event shapes in proton-proton collisions at a center-of-mass energy of 7.0 TeV using the ATLAS detector at the Large Hadron Collider. Results are presented at the particle-level, permitting comparisons to multiple Monte Carlo event generator tools. Numerous tools and techniques that enable detailed analysis of the hadronic final state at high luminosity are described. The approaches presented utilize the dual strengths of the ATLAS calorimeter and tracking systems to provide high resolution and robust measurements of the hadronic jets that constitute both a background and a signal throughout ATLAS physics analyses. The study of the hadronic final state is then extended to jet substructure, where the energy flow and topology within individual jets is studied at the detector level and techniques for estimating systematic uncertainties for such measurements are commissioned in the first data. These first substructure measurements in ATLAS include the jet mass and sub-jet multiplicity as well as those concerned with multi-body hadronic decays and color flow within jets. Finally, the first boosted hadronic object observed at the LHC -- the decay of the top quark to a single jet -- is presented.
Intercalibration Of The Atlas Calorimeters And Cross Section Measurements For Inclusive Jet And Dijet Production In Proton Proton Collisions At Center Of Mass Energy
DOWNLOAD
Author : Miroslav Vujicic
language : en
Publisher:
Release Date : 2011
Intercalibration Of The Atlas Calorimeters And Cross Section Measurements For Inclusive Jet And Dijet Production In Proton Proton Collisions At Center Of Mass Energy written by Miroslav Vujicic and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Chemistry, Physical and theoretical categories.
Precision Measurement Of Jets At The Atlas Experiment
DOWNLOAD
Author : Gareth John Ashley Brown
language : en
Publisher:
Release Date : 2013
Precision Measurement Of Jets At The Atlas Experiment written by Gareth John Ashley Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
This thesis describes the measurements of jet activity in the rapidity region between a dijet system formed in proton-proton collisions at a centre-of-mass energy of 7 TeV. The data used were collected by the ATLAS detector during 2010 at the Large Hadron Collider at CERN. A number of observables that probe additional quark and gluon radiation in the dijet topology are studied. The development and performance of the monitoring system for the ATLAS calorimeter high level trigger is described. The performance of the jet calibration and a study of the properties of jets in the forward calorimeter is also given. The fraction of events that survive a veto on jets with transverse momentum above a jet veto scale, Q0, in the rapidity region between the dijet system is measured for dijets with mean transverse momentum 50
Measurement Of The Z T63 1hn T63 1hn Z Tau Tau Production Cross Section In Proton Proton Collisions At 7 Tev Center Of Mass Energy With The Atlas Detector
DOWNLOAD
Author : Daniele Capriotti
language : en
Publisher:
Release Date : 2012
Measurement Of The Z T63 1hn T63 1hn Z Tau Tau Production Cross Section In Proton Proton Collisions At 7 Tev Center Of Mass Energy With The Atlas Detector written by Daniele Capriotti 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 Measurement Of Jet Shapes In Proton Proton Collisions At 7 0 Tev Center Of Mass Energy With The Atlas Detector At The Large Hadron Collider
DOWNLOAD
Author : Zachary L. Marshall
language : en
Publisher:
Release Date : 2011
A Measurement Of Jet Shapes In Proton Proton Collisions At 7 0 Tev Center Of Mass Energy With The Atlas Detector At The Large Hadron Collider written by Zachary L. Marshall and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Large Hadron Collider (France and Switzerland) categories.