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Author: Song Ming Wang
Publisher:
ISBN:
Category : Higgs bosons
Languages : en
Pages : 12
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Author: Song Ming Wang
Publisher:
ISBN:
Category : Higgs bosons
Languages : en
Pages : 12
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Book Description
Author: K Huitu
Publisher: CRC Press
ISBN: 9780750306614
Category : Science
Languages : en
Pages : 1112
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Book Description
High Energy Physics 99 contains the 18 invited plenary presentations and 250 contributions to parallel sessions presented at the International Europhysics Conference on High Energy Physics. The book provides a comprehensive survey of the latest developments in high energy physics. Topics discussed include hard high energy, structure functions, soft interactions, heavy flavor, the standard model, hadron spectroscopy, neutrino masses, particle astrophysics, field theory, and detector development.
Author: Jackson Burzynski
Publisher: Springer Nature
ISBN: 3031304667
Category : Science
Languages : en
Pages : 201
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Book Description
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.
Author: H. V. Klapdor-Kleingrothaus
Publisher: CRC Press
ISBN: 1482268868
Category : Science
Languages : en
Pages : 1236
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Book Description
Addressing the need for an up-to-date reference on silicon devices and heterostructures, Beyond the Desert 99 reviews the technology used to grow and characterize Goup IV alloy films. It covers the theory, device design, and simulation of heterojunction transistors, emphasizing their relevance in developing the technologies involving strained layer
Author: Antonio Ferrer
Publisher: World Scientific
ISBN: 9814546380
Category :
Languages : en
Pages : 234
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Book Description
This book collects a series of papers presented at the XXIV International Meeting on Fundamental Physics. This annual conference is devoted to reviewing current topics in the field of high energy physics. From the Tevatron to the LHC reviews the present status of experiments at large accelerators (Tevatron, LEP, LHC) and deals with selected subjects like CP violation, B physics, glueballs, neutrinos and supersymmetry.
Author: Chong-sa Lim
Publisher: World Scientific
ISBN: 9813201177
Category : Science
Languages : en
Pages : 1550
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Book Description
This book presents topics of major interest to the high energy physics community, as well as recent research results.
Author: Aleandro Nisati
Publisher: World Scientific Publishing Company
ISBN: 9789814425872
Category : Higgs bosons
Languages : en
Pages : 0
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Book Description
An exposition of the experimental searches for the Higgs Boson, with emphasis on the Large Hadron Collider (LHC) at CERN. It contains a description of the research in this field and can offer a survey on the search for the Higgs
Author:
Publisher:
ISBN:
Category : Photon-photon interactions
Languages : en
Pages : 488
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Author:
Publisher:
ISBN:
Category : Nuclear physics
Languages : en
Pages : 482
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Author: Fabio Anulli
Publisher:
ISBN:
Category : Exclusive reactions (Nuclear physics)
Languages : en
Pages : 488
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Book Description
