Search For Exotic Long Lived Particles With The Lhcb Detector
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Search For Exotic Long Lived Particles With The Lhcb Detector
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Author : Pieter Norbert Yvonne David
language : en
Publisher:
Release Date : 2016
Search For Exotic Long Lived Particles With The Lhcb Detector written by Pieter Norbert Yvonne David and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
A Search For Exotic Higgs Decays
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Author : Jackson Burzynski
language : en
Publisher: Springer Nature
Release Date : 2023-05-23
A Search For Exotic Higgs Decays written by Jackson Burzynski and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-05-23 with Science categories.
The absence of new physics at the TeV scale observed thus far at the Large Hadron Collider (LHC) motivates an increasing focus on searches for weakly-coupled new particles and exotic signatures. In particular, particles with macroscopic mean proper lifetimes, known as long-lived particles (LLPs), are of significant interest due to their ability to elude the majority of searches which rely on the assumption that Beyond Standard Model particles decay close to the primary interaction point. Many models which aim to solve various issues with the Standard Model (SM) introduce new particles with lifetimes that are either unconstrained, or even shown to prefer the macroscopic regime. These theories often point to the Higgs boson as a possible portal to new physics, with exotic Higgs decays being the primary phenomenological consequence and means of discovery. It is well motivated both from theory and experimental constraints to consider the scenario in which the particles produced in these exotic decays have macroscopic proper lifetimes and give rise to unique detector signatures. This work describes a search for exotic decays of the Higgs boson to two long-lived, neutral, spin-0 particles which subsequently decay to pairs of b quarks, giving the striking signature of displaced hadronic jets in the ATLAS inner detector. Several other ATLAS searches have probed this decay topology previously, excluding branching ratios of the Higgs boson to LLPs of more than 10% for proper lifetimes greater than 100mm. These searches relied on dedicated triggers designed to select events with LLPs decaying in the ATLAS calorimeter or muon spectrometer. The lack of an equivalent trigger for LLP decays in the ATLAS inner detector has been a limiting factor in probing LLP lifetimes less than 100mm. To circumvent the difficulty of triggering on LLP decays, the search presented in this thesis exploits the ZH associated production mode, relying on leptonic trigger signatures to select interesting events. This is the first search for Higgs boson decays into LLPs to exploit this analysis methodology and additionally makes use of several novel methods for both background rejection and background estimation. No excess over Standard Model predictions is observed, and upper limits are set on the branching ratio of the Higgs boson to LLPs . Depending on the mass of the LLP, branching ratios greater than 10% are excluded for lifetimes as small as 4mm and as large as 100mm, probing an important gap in the ATLAS exotic Higgs decay programme. In comparison to the previous searches for Higgs decays to LLPs, these are among the most stringent limits placed on this scenario, and for LLPs with masses below 40 GeV these results represent the strongest existing constraints on the branching ratio of the Higgs boson to LLPs in this lifetime regime.
Search For Exotic Massive Long Lived Particles Decaying Semileptonically In The Lhcb Detector
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Author :
language : en
Publisher:
Release Date : 2015
Search For Exotic Massive Long Lived Particles Decaying Semileptonically In The Lhcb Detector written by 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.
Astroparticle Particle Space Physics And Detectors For Physics Applications Proceedings Of The 14th Icatpp Conference
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Author : Simone Giani
language : en
Publisher: World Scientific
Release Date : 2014-06-02
Astroparticle Particle Space Physics And Detectors For Physics Applications Proceedings Of The 14th Icatpp Conference written by Simone Giani and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-06-02 with Science categories.
The exploration of the subnuclear world is done through increasingly complex experiments covering a wide range of energy and performed in a large variety of environments ranging from particle accelerators, underground detectors to satellites and the space laboratory. The achievement of these research programs calls for novel techniques, new materials and instrumentation to be used in detectors, often of large scale. Therefore, fundamental physics is at the forefront of technological advance and also leads to many applications. Among these, are the progresses from space experiments whose results allow the understanding of the cosmic environment, of the origin and evolution of the universe after the Big Bang.
Adventure Of The Large Hadron Collider The From The Big Bang To The Higgs Boson
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Author : Daniel Denegri
language : en
Publisher: World Scientific
Release Date : 2021-11-08
Adventure Of The Large Hadron Collider The From The Big Bang To The Higgs Boson written by Daniel Denegri and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-11-08 with Science categories.
An introduction to the world of quarks and leptons, and of their interactions governed by fundamental symmetries of nature, as well as an introduction to the connection that exists between worlds of the infinitesimally small and the infinitely large.The book begins with a simple presentation of the theoretical framework, the so-called Standard Model, which evolved gradually since the 1960s. The key experiments establishing it as the theory of elementary particle physics, but also its missing pieces and conceptual weaknesses are introduced. The book proceeds with the extraordinary story of the Large Hadron Collider at CERN — the largest purely scientific project ever realized. Conception, design and construction by worldwide collaborations of the detectors of size and complexity without precedent in scientific history are discussed. The book then offers the reader a state-of-the art (2020) appreciation of the depth and breadth of the physics exploration performed by the LHC experiments: the study of new forms of matter, the understanding of symmetry-breaking phenomena at the fundamental level, the exciting searches for new physics such as dark matter, additional space dimensions, new symmetries, and more. The adventure of the LHC culminated in the discovery of the Higgs boson in 2012 (Nobel Prize in Physics in 2013). The last chapter of this book describes the plans for the LHC during the next 15 years of exploitation and improvement, and the possible evolution of the field and future collider projects under consideration.The authors are researchers from CERN, CEA and CNRS (France), and deeply engaged in the LHC program: D Denegri in the CMS experiment, C Guyot, A Hoecker and L Roos in the ATLAS experiment. Some of them are involved since the inception of the project. They give a lively and accessible inside view of this amazing scientific and human adventure.
Proceedings Of The Conference In Honour Of The 90th Birthday Of Freeman Dyson
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Author : Kok Khoo Phua
language : en
Publisher: World Scientific
Release Date : 2014-04-22
Proceedings Of The Conference In Honour Of The 90th Birthday Of Freeman Dyson written by Kok Khoo Phua and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-04-22 with Science categories.
Professor Freeman Dyson, a great physicist, thinker and futurist, has been very active in scientific, literary and public policy activities throughout his career. As a tribute to him on the occasion of his 90th birthday and to celebrate his lifelong contributions in physics, mathematics, astronomy, nuclear engineering and global warming, a conference covering a wide range of topics was held in Singapore from 26 to 29 August 2013. Distinguished scientists from around the world, including Nobel Laureate Professor David Gross, joined Professor Dyson in the celebration with a festival of lectures.This memorable volume collects an interesting lecture by Professor Dyson, Is a Graviton Detectable?, contributions by speakers at the conference, as well as guest contributions by colleagues who celebrated Dyson's birthday at Rutgers University and Institute for Advanced Study in Princeton.About Freeman DysonFreeman John Dyson FRS, born December 15, 1923, is an eminent English-born American physicist, mathematician, and futurist. He is famous for his work in quantum electrodynamics, solid-state physics, mathematics, astronomy and nuclear engineering, as well as a renowned and best-selling author. He has spent most of his life as a professor of physics at the Institute for Advanced Study in Princeton, taking time off to advise the US government and write books for the public. He has won numerous notable awards including the Enrico Fermi Award, Templeton Prize, Wolf Prize, Pomeranchuk Prize, and Henri Poincaré Prize.
Annual Report Of The European Organization For Nuclear Research
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Author : European Organization for Nuclear Research
language : en
Publisher:
Release Date : 2014
Annual Report Of The European Organization For Nuclear Research written by European Organization for Nuclear Research and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Nuclear physics categories.
Beams
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Author : Volker Ziemann
language : en
Publisher: Springer Nature
Release Date : 2024-03-30
Beams written by Volker Ziemann and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-03-30 with Science categories.
This book describes and explains the world of particle accelerators and the physics they study. The presentation is non-technical (E=mc2 is the only equation!) and the prose accessible. By following the co-evolution of particle accelerators and particle physics, readers will learn why the accelerators are built, how they work, and what "results" they produce. The book highlights the great ideas (e.g. synchrotron) and technological advances (superconducting magnets) that boosted the potential of accelerators and led to new discoveries, eventually resulting in the standard model of particle physics. Many concepts are illustrated with figures derived from three-dimensional models; these include theaccelerators, detectors, and particles. Background information about the main protagonists, along with pointers to further reading, e.g. from "Scientific American," are provided in endnotes.
Cern Courier
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Author :
language : en
Publisher:
Release Date : 2010
Cern Courier written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Nuclear energy categories.
Search For Higgs Bosons Decaying Into Long Lived Exotic Particles In The Lhcb Experiment
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Author : Neal Gauvin
language : en
Publisher:
Release Date : 2011
Search For Higgs Bosons Decaying Into Long Lived Exotic Particles In The Lhcb Experiment written by Neal Gauvin 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.