Search For Massive Top Resonances Using Jet Substructure At Cms

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Advances In Jet Substructure At The Lhc
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Author : Roman Kogler
language : en
Publisher: Springer Nature
Release Date : 2021-05-10
Advances In Jet Substructure At The Lhc written by Roman Kogler and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-10 with Science categories.
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.
Search For Massive Top Resonances Using Jet Substructure At Cms
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Author : James W. Dolen
language : en
Publisher:
Release Date : 2012
Search For Massive Top Resonances Using Jet Substructure At Cms written by James W. Dolen 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 search is presented for a new massive particle, generically referred to as a Z', decaying into a top anti-top quark pair, which then decay hadronically. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis uses data collected by the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) at CERN in 2011. The dataset contains 4.92 fb−1 of integrated luminosity from proton-proton collisions at a center of mass energy of 7 TeV. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z' modeled for several widths, as well as for a Randall-Sundrum Kaluza-Klein gluon. In addition, any enhancement to t t-bar production for invariant masses above 1 TeV/c2 in the standard model is constrained.
Looking Inside Jets
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Author : Simone Marzani
language : en
Publisher: Springer
Release Date : 2019-05-11
Looking Inside Jets written by Simone Marzani and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-05-11 with Science categories.
This concise primer reviews the latest developments in the field of jets. Jets are collinear sprays of hadrons produced in very high-energy collisions, e.g. at the LHC or at a future hadron collider. They are essential to and ubiquitous in experimental analyses, making their study crucial. At present LHC energies and beyond, massive particles around the electroweak scale are frequently produced with transverse momenta that are much larger than their mass, i.e., boosted. The decay products of such boosted massive objects tend to occupy only a relatively small and confined area of the detector and are observed as a single jet. Jets hence arise from many different sources and it is important to be able to distinguish the rare events with boosted resonances from the large backgrounds originating from Quantum Chromodynamics (QCD). This requires familiarity with the internal properties of jets, such as their different radiation patterns, a field broadly known as jet substructure. This set of notes begins by providing a phenomenological motivation, explaining why the study of jets and their substructure is of particular importance for the current and future program of the LHC, followed by a brief but insightful introduction to QCD and to hadron-collider phenomenology. The next section introduces jets as complex objects constructed from a sequential recombination algorithm. In this context some experimental aspects are also reviewed. Since jet substructure calculations are multi-scale problems that call for all-order treatments (resummations), the bases of such calculations are discussed for simple jet quantities. With these QCD and jet physics ingredients in hand, readers can then dig into jet substructure itself. Accordingly, these notes first highlight the main concepts behind substructure techniques and introduce a list of the main jet substructure tools that have been used over the past decade. Analytic calculations are then provided for several families of tools, the goal being to identify their key characteristics. In closing, the book provides an overview of LHC searches and measurements where jet substructure techniques are used, reviews the main take-home messages, and outlines future perspectives.
Searching For New Physics At Small And Large Scales Tasi 2012 Proceedings Of The 2012 Theoretical Advanced Study Institute In Elementary Particle Physics
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Author : Martin Schmaltz
language : en
Publisher: World Scientific
Release Date : 2013-08-28
Searching For New Physics At Small And Large Scales Tasi 2012 Proceedings Of The 2012 Theoretical Advanced Study Institute In Elementary Particle Physics written by Martin Schmaltz and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-08-28 with Science categories.
This volume is a compilation of the lectures at TASI 2012, held in Boulder, Colorado, June 2012. The program comprises two parallel lecture series on particle physics and on cosmology. The particle physics lectures covers LHC related experimental techniques, phenomenology, as well as basics in physics beyond the standard model. The cosmology series give a general introduction to modern cosmology with special attention to the topics of dark matter, the microwave background and alternatives to the standard model of cosmology. The lectures are accessible to graduate students at the initial stages of their research careers.
Proceedings Of The Xxiv Dae Brns High Energy Physics Symposium Jatni India
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Author : Bedangadas Mohanty
language : en
Publisher: Springer Nature
Release Date : 2022-10-05
Proceedings Of The Xxiv Dae Brns High Energy Physics Symposium Jatni India written by Bedangadas Mohanty and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-05 with Science categories.
This book presents proceedings from the XXIV DAE-BRNS High Energy Physics (HEP) Symposium 2020, held at the National Institute of Science Education and Research, Jatni, Odisha, India. The contributions cover a variety of topics in particle physics, astroparticle physics, cosmology and related areas from both experimental and theoretical perspectives, namely (1) Standard Model Physics, (2) Beyond Standard Model Physics, (3) Relativistic Heavy-Ion Physics & QCD, (4) Neutrino Physics, (5) Particle Astrophysics & Cosmology, (6) Detector Development Future Facilities and Experiments, (7) Formal Theory, (8) Societal Applications: Medical Physics, Imaging, etc.
Electroweak Physics At The Lhc
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Author : Matthias U. Mozer
language : en
Publisher: Springer
Release Date : 2016-03-24
Electroweak Physics At The Lhc written by Matthias U. Mozer and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-03-24 with Science categories.
The book discusses the recent experimental results obtained at the LHC that involve electroweak bosons. The results are placed into an appropriate theoretical and historical context. The work pays special attention to the rising subject of hadronically decaying bosons with high boosts, documenting the state-of-the-art identification techniques and highlighting typical results. The text is not limited to electroweak physics in the strict sense, but also discusses the use of electroweak vector-bosons as tool in the study of other subjects in particle physics, such as determinations of the proton structure or the search for new exotic particles. The book is particularly well suited for graduate students, starting their thesis work on topics that involve electroweak bosons, as the book provides a comprehensive description of phenomena observable at current accelerators as well as a summary of the most relevant experimental techniques.
Higgs Boson Potential At Colliders Status And Perspectives
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Author : Biagio Di Micco
language : en
Publisher: Roma TrE-Press
Release Date : 2020-12-18
Higgs Boson Potential At Colliders Status And Perspectives written by Biagio Di Micco and has been published by Roma TrE-Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-18 with Science categories.
Questo documento riassume lo stato attuale degli ricerche studi, teorici e sperimentali, sulla produzione di coppie di bosoni di Higgs, e sui vincoli, sia diretti che indiretti, al valore del termine di auto-interazione del bosone di Higgs, con l’intento di servire da referenza per i prossimi anni. Il documento discute lo stato degli studi teorici, includendo le più recenti stime della sezione di produzione di coppie di bosoni di Higgs, sviluppi sulle teorie di campo efficaci, e studi su specifici scenari di nuova fisica che possono contribuire alla produzione di due bosoni di Higgs. Sono presentati i più recenti risultati sperimentali sulle ricerche di coppie di bosoni di Higgs e sui limiti diretti e indiretti al termine di auto-interazione, ottenuti al Large Hadron Collider di Ginevra, con una panoramica delle tecniche sperimentali. Infine, sono discusse le capacità dei collisionatori futuri di determinare il termine di auto-interazione del bosone di Higgs. Questo lavoro è iniziato come raccolta di contributi della conferenza “Di-Higgs ai Colliders”, che ha avuto luogo a Fermilab dal 4 al 9 settembre 2018, ma gli argomenti discussi vanno al di là di quelli presentati alla conferenza, includendo ulteriori sviluppi. DOI: 10.13134/979-12-80060-85-3
First Measurement Of The Running Of The Top Quark Mass
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Author : Matteo M. Defranchis
language : en
Publisher: Springer Nature
Release Date : 2022-01-03
First Measurement Of The Running Of The Top Quark Mass written by Matteo M. Defranchis and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-01-03 with Science categories.
In this thesis, the first measurement of the running of the top quark mass is presented. This is a fundamental quantum effect that had never been studied before. Any deviation from the expected behaviour can be interpreted as a hint of the presence of physics beyond the Standard Model. All relevant aspects of the analysis are extensively described and documented. This thesis also describes a simultaneous measurement of the inclusive top quark-antiquark production cross section and the top quark mass in the simulation. The measured cross section is also used to precisely determine the values of the top quark mass and the strong coupling constant by comparing to state-of-the-art theoretical predictions. All the theoretical and experimental aspects relevant to the results presented in this thesis are discussed in the initial chapters in a concise but complete way, which makes the material accessible to a wider audience.
Jet Physics At The Lhc
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Author : Klaus Rabbertz
language : en
Publisher: Springer
Release Date : 2016-10-11
Jet Physics At The Lhc written by Klaus Rabbertz and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-11 with Science categories.
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.
Novel Ideas For Accelerators Particle Detection And Data Challenges At Future Colliders
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Author : Alessandro Tricoli
language : en
Publisher: Frontiers Media SA
Release Date : 2023-07-21
Novel Ideas For Accelerators Particle Detection And Data Challenges At Future Colliders written by Alessandro Tricoli and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-07-21 with Science categories.