Characterization Of Jets In Heavy Ion Collisions Using Photons At The Lhc With The Cms Detector PDF Download
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| Author | : Richard Alexander Barbieri |
| Publisher | : |
| Total Pages | : 138 |
| Release | : 2017 |
| Genre | : |
| ISBN | : |
Download Characterization of Jets in Heavy Ion Collisions Using Photons at the LHC with the CMS Detector Book in PDF, ePub and Kindle
Using the CMS detector at the LHC, a quantitative study of jet energy loss and angular deflection inside the high energy-density medium formed in PbPb collisions is made. Photons are used to measure the initial state of a color-charged probe while jet reconstruction is used to measure the final state. Significant loss of energy to the medium as a function of initial parton momentum is observed, while no significant angular deflection is found.
| Author | : Aaron Angerami |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 180 |
| Release | : 2013-12-02 |
| Genre | : Science |
| ISBN | : 3319012193 |
Download Jet Quenching in Relativistic Heavy Ion Collisions at the LHC Book in PDF, ePub and Kindle
This thesis presents the first measurements of jets in relativistic heavy ion collisions as reported by the ATLAS Collaboration. These include the first direct observation of jet quenching through the observation of a centrality-dependent dijet asymmetry. Also, a series of jet suppression measurements are presented, which provide quantitative constraints on theoretical models of jet quenching. These results follow a detailed introduction to heavy ion physics with emphasis on the phenomenon of jet quenching and a comprehensive description of the ATLAS detector and its capabilities with regard to performing these measurements.
| Author | : Patrick L.S. Connor |
| Publisher | : Springer Nature |
| Total Pages | : 325 |
| Release | : 2019-11-29 |
| Genre | : Science |
| ISBN | : 3030343839 |
Download Inclusive b Jet Production in Proton-Proton Collisions Book in PDF, ePub and Kindle
^ 74 GeV and |y| 2.4; the b jets must contain a B hadron. The measurement has significant statistics up to p T ∼ O(TeV). Advanced methods of unfolding are performed to extract the signal. It is found that fixed-order calculations with underlying event describe the measurement well.
| Author | : Yetkin Yilmaz |
| Publisher | : |
| Total Pages | : 148 |
| Release | : 2013 |
| Genre | : |
| ISBN | : |
Download Jet Quenching in Heavy-ion Collisions at LHC with CMS Detector Book in PDF, ePub and Kindle
The collision of highly relativistic nuclei can produce a volume of high energy density which can be used to learn about the behavior of quantum chromodynamics (QCD) at extreme conditions, such as those of the universe at times before and during the formation of hadrons out of quarks and gluons. This thesis presents experimental studies of jet-quenching phenomena in PbPb collisions at [square root of]sNN = 2.76 TeV, with a focus on the study of the energy-loss, namely the analysis of correlations of jet pairs as measured by the CMS detector at LHC. The implications of the results are discussed by comparison of simple models with data. It is observed that the geometrical configuration of the dijets and the nuclear collision region plays an important role in the correlations between the jets, and the set of CMS results reviewed can illustrate the dependence of the amount of lost energy on the length of the traversed medium.
| Author | : Klaus Rabbertz |
| Publisher | : Springer |
| Total Pages | : 0 |
| Release | : 2016-10-19 |
| Genre | : Science |
| ISBN | : 9783319421131 |
Download Jet Physics at the LHC Book in PDF, ePub and Kindle
This book reviews the latest experimental results on jet physics from proton-proton collisons at the LHC. Jets allow to determine the strong coupling constant over a wide range of energies up the highest ones possible so far, and to constrain the gluon parton distribution of the proton, both of which are important uncertainties on theory predictions in general and for the Higgs boson in particular.A novel approach in this book is to categorize the examined quantities according to the types of absolute, ratio, or shape measurements and to explain in detail the advantages and differences. Including numerous illustrations and tables the physics message and impact of each observable is clearly elaborated.
| Author | : Frank Teng Ma |
| Publisher | : |
| Total Pages | : 163 |
| Release | : 2013 |
| Genre | : |
| ISBN | : |
Download Detailed Characterization of Jets in Heavy Ion Collisions Using Jet Fragmentation Functions Book in PDF, ePub and Kindle
In this thesis the jet fragmentation function of inclusive jets with transverse momentum PT > 100 GeV/c in PbPb collisions is measured for reconstructed charged particles with PT > 1 GeV/c within the jet cone. A data sample of PbPb collisions collected in 2011 at a center-of-mass energy of [square root of]sNN = 2.76 TeV corresponding to an integrated luminosity of 150 [mu]b-1 is used. The results for PbPb collisions as a function of collision centrality are compared to reference distributions based on pp data collected at the same collision energy. A centrality-dependent modification of the fragmentation function is revealed. For the most central collisions a significant enhancement is observed in the PbPb/pp fragmentation function ratio for the charged particles with PT less than 3 GeV/c.
| Author | : Constantin Loizides |
| Publisher | : ibidem-Verlag / ibidem Press |
| Total Pages | : 180 |
| Release | : 2012-02-03 |
| Genre | : Science |
| ISBN | : 3838255577 |
Download Jet physics in ALICE Book in PDF, ePub and Kindle
The ALICE experiment is one of the experiments currently prepared for the Large Hadron Collider (LHC) at CERN, Geneva, starting operation end of 2007. ALICE is dedicated to the research on nucleus-nucleus collisions at ultra-relativistic energies, which addresses the properties of strongly interacting matter under varying conditions of high density and temperature. The conditions provided at the LHC allow significant qualitative improvement with respect to previous studies. In particular, energetic probes, light quarks and gluons, will be abundantly produced. These probes might be identified by their fragmentation into correlated particles, so called jets, of high enough energy to allow full reconstruction of jet properties; even in the underlying heavy-ion environment.Understanding the dependence of high-energy jet production and fragmentation influenced by the dense medium created in the collision region is an open field of active research. Generally, one expects energy loss of the probes due to medium-induced gluon radiation. It is suggested that hadronization products of these, rather soft gluons may be contained within the jet emission cone, resulting in a modification of the characteristic jet fragmentation, as observed via longitudinal and transverse momentum distributions with respect to the direction of the initial parton, as well as of the multiplicity distributions arising from the jet fragmentation. Particle momenta parallel to the jet axis are softened (jet quenching), while transverse to it increased (transverse heating). The present thesis studies the capabilities of the ALICE detectors to measure these jets and quantifies obtainable rates and the quality of jet reconstruction, in both proton-proton and lead-lead collisions at the LHC. In particular, it is addressed whether modification of the jet fragmentation can be detected within the high-particle-multiplicity environment of central lead-lead collisions.
| Author | : Giuliano Gustavino |
| Publisher | : Springer |
| Total Pages | : 245 |
| Release | : 2017-06-19 |
| Genre | : Science |
| ISBN | : 3319588710 |
Download Search for New Physics in Mono-jet Final States in pp Collisions Book in PDF, ePub and Kindle
This thesis provides a detailed and comprehensive description of the search for New Physics at the Large Hadron Collider (LHC) in the mono-jet final state, using the first 3.2 fb-1 of data collected at the centre of mass energy of colliding protons of 13~TeV recorded in the ATLAS experiment at LHC. The results are interpreted as limits in different theoretical contexts such as compressed supersymmetric models, theories that foresee extra-spatial dimensions and in the dark matter scenario. In the latter the limits are then compared with those obtained by other ATLAS analyses and by experiments based on completely different experimental techniques, highlighting the role of the mono-jet results in the context of dark matter searches.Lastly, a set of possible analysis improvements are proposed to reduce the main uncertainties that affect the signal region and to increase the discovery potential by further exploiting the information on the final state.
| Author | : Mireia Crispín Ortuzar |
| Publisher | : Springer |
| Total Pages | : 194 |
| Release | : 2016-08-25 |
| Genre | : Science |
| ISBN | : 3319434616 |
Download High Jet Multiplicity Physics at the LHC Book in PDF, ePub and Kindle
This book describes research in two different areas of state-of-the-art hadron collider physics, both of which are of central importance in the field of particle physics. The first part of the book focuses on the search for supersymmetric particles called gluinos. The book subsequently presents a set of precision measurements of “multi-jet” collision events, which involve large numbers of newly created particles, and are among the dominant processes at the Large Hadron Collider (LHC). Now that a Higgs boson has been discovered at the LHC, the existence (or non-existence) of supersymmetric particles is of the utmost interest and significance, both theoretically and experimentally. In addition, multi-jet collision events are an important background process for a wide range of analyses, including searches for supersymmetry.
| Author | : Roman Kogler |
| Publisher | : Springer Nature |
| Total Pages | : 287 |
| Release | : 2021-05-10 |
| Genre | : Science |
| ISBN | : 3030728587 |
Download Advances in Jet Substructure at the LHC Book in PDF, ePub and Kindle
This book introduces the reader to the field of jet substructure, starting from the basic considerations for capturing decays of boosted particles in individual jets, to explaining state-of-the-art techniques. Jet substructure methods have become ubiquitous in data analyses at the LHC, with diverse applications stemming from the abundance of jets in proton-proton collisions, the presence of pileup and multiple interactions, and the need to reconstruct and identify decays of highly-Lorentz boosted particles. The last decade has seen a vast increase in our knowledge of all aspects of the field, with a proliferation of new jet substructure algorithms, calculations and measurements which are presented in this book. Recent developments and algorithms are described and put into the larger experimental context. Their usefulness and application are shown in many demonstrative examples and the phenomenological and experimental effects influencing their performance are discussed. A comprehensive overview is given of measurements and searches for new phenomena performed by the ATLAS and CMS Collaborations. This book shows the impressive versatility of jet substructure methods at the LHC.
