New Physics at the Large Hadron Collider

Author: Harald Fritzsch
Publisher: World Scientific
ISBN: 981314551X
Format: PDF, Docs
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The Standard Theory of Particle Physics describes successfully the observed strong and electroweak interactions, but it is not a final theory of physics, since many aspects are not understood: (1) How can gravity be introduced in the Standard Theory? (2) How can we understand the observed masses of the leptons and quarks as well as the flavor mixing angles? (3) Why are the masses of the neutrinos much smaller than the masses of the charged leptons? (4) Is the new boson, discovered at CERN, the Higgs boson of the Standard Theory or an excited weak boson? (5) Are there new symmetries at very high energy, e.g. a broken supersymmetry? (6) Are the leptons and quarks point-like or composite particles? (7) Are the leptons and quarks at very small distances one-dimensional objects, e.g. superstrings? This proceedings volume comprises papers written by the invited speakers discussing the many important issues of the new physics to be discovered at the Large Hadron Collider. Contents:PrefaceAccelerator Considerations of Large Circular Colliders (Alex Chao)Physics Potential and Motivations for a Muon Collider (Mario Greco)Pentaquarks and Possible Anomalies at LHCb (George Lafferty)Neutrino Masses and SO10 Unification (P Minkowski)Neutrino Experiments: Hierarchy, CP, CPT (Manmohan Gupta, Monika Randhawa and Mandip Singh)Constraining the Texture Mass Matrices (Gulsheen Ahuja)Rare B-Meson Decays at the Crossroads (Ahmed Ali)Exploring the Standard Model at the LHC (Brigitte Vachon)Meson/Baryon/Tetraquark Supersymmetry from Superconformal Algebra and Light-Front Holography (Stanley J Brodsky, Guy F de Téramond, Hans Günter Dosch and Cédric Lorcé)The Spin-Charge-Family Theory (Norma Susana Mankoč Borstnik)Search for Direct CP Violation in Baryonic b-Hadron Decays (C Q Geng and Y K Hsiao)New Physics and Astrophysical Neutrinos in IceCube (Atsushi Watanabe)The 750 GeV Diphoton Excess and SUSY (S Heinemeyer)Constraints on the ωπ Form Factor from Analyticity and Unitarity (B Ananthanarayan, Irinel Caprini and Bastian Kubis)Dynamical Tuning of the Initial Condition in Small Field Inflations — Can We Testify the CW Mechanism in the Universe (Satoshi Iso)Physics of Higgs Boson Family (Ngee-Pong Chang)On the Breaking of μ-τ Flavor Symmetry (Zhen-Hua Zhao)Neutrino Mass Ordering in Future Neutrinoless Double Beta Decay Experiments (Jue Zhang)Predicting the CP-Phase for Neutrinos (Eiichi Takasugi)Sum Rules for Leptons (Martin Spinrath)Composite Weak Bosons at the Large Hadron Collider (Harald Fritzsch)Searching for Composite Higgs Models at the LHC (Thomas Flacke)Gauge-Higgs EW and Grand Unification (Yutaka Hosotani)Colour Octet Extension of 2HDM (German Valencia)New Physics/Resonances in Vector Boson Scattering at the LHC (Jürgen Reuter, Wolfgang Kilian, Thorsten Ohl and Marco Sekulla)Dimensional Regularization is Generic (Kazuo Fujikawa)A De-gauging Approach to Physics Beyond the Standard Model (Chi Xiong)Extension of Standard Model in Multi-spinor Field Formalism — Visible and Dark Sectors (Ikuo S Sogami)Aspects of String Phenomenology and New Physics (I Antoniadis)Cosmological Constant vis-à-vis Dynamical Vacuum: Bold Challenging the ΛCDM (Joan Solà) Readership: Graduates and researchers in high energy physics.

Physics at the Large Hadron Collider

Author: Amitava Datta
Publisher: Springer Science & Business Media
ISBN: 9788184892956
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In an epoch when particle physics is awaiting a major step forward, the Large Hydron Collider (LHC) at CERN, Geneva will soon be operational. It will collide a beam of high energy protons with another similar beam circulation in the same 27 km tunnel but in the opposite direction, resulting in the production of many elementary particles some never created in the laboratory before. It is widely expected that the LHC will discover the Higgs boson, the particle which supposedly lends masses to all other fundamental particles. In addition, the question as to whether there is some new law of physics at such high energy is likely to be answered through this experiment. The present volume contains a collection of articles written by international experts, both theoreticians and experimentalists, from India and abroad, which aims to acquaint a non-specialist with some basic issues related to the LHC. At the same time, it is expected to be a useful, rudimentary companion of introductory exposition and technical expertise alike, and it is hoped to become unique in its kind. The fact that there is substantial Indian involvement in the entire LHC endeavour, at all levels including fabrication, physics analysis procedures as well as theoretical studies, is also amply brought out in the collection.

Top Quark Physics at Hadron Colliders

Author: Arnulf Quadt
Publisher: Springer Science & Business Media
ISBN: 3540710604
Format: PDF, ePub, Mobi
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This will be a required acquisition text for academic libraries. More than ten years after its discovery, still relatively little is known about the top quark, the heaviest known elementary particle. This extensive survey summarizes and reviews top-quark physics based on the precision measurements at the Fermilab Tevatron Collider, as well as examining in detail the sensitivity of these experiments to new physics. Finally, the author provides an overview of top quark physics at the Large Hadron Collider.

Perspectives on LHC Physics

Author: G. L. Kane
Publisher: World Scientific
ISBN: 9812779752
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The Large Hadron Collider (LHC), located at CERN, Geneva, Switzerland, is the world's largest and highest energy and highest intensity particle accelerator. This book provides an overview on the techniques that will be crucial for finding new physics at the LHC, as well as perspectives on the importance and implications of the discoveries. Among the contributors to this book are leaders and visionaries in the field of particle physics beyond the Standard Model, including two Nobel Laureates (Steven Weinberg and Frank Wilczek), and presumably some future Nobel Laureates, plus top younger theorists and experimenters.

Large Hadron Collider Phenomenology

Author: M. Kramer
Publisher: CRC Press
ISBN: 9781420034080
Format: PDF
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With the Large Hadron Collider (LHC) under construction and due to come online in 2007, it is appropriate to engage in a focused review on LHC phenomenology. At a time when most of the experimental effort is centered on detector construction and software development, it is vitally important to direct the experimental community and, in particular, new researchers on the physics phenomena expected from the LHC. Large Hadron Collider Phenomenology covers the capabilities of LHC, from searches for the Higgs boson and physics beyond the standard model to detailed studies of quantum chromodynamics, the B-physics sectors, and the properties of hadronic matter at high energy density as realized in heavy-ion collisions. Written by experienced researchers and experimentalists, this reference examines the basic properties and potentials of the machine, detectors, and software required for physics analyses. The book starts with a basic introduction to the standard model and its applications to the phenomena observed at high energy collisions. Later chapters describe the key technological challenges facing the construction of the LHC machine, the operating detectors of the LHC, and the vast computing grid needed to analyze the data. In the final sections, the contributors discuss the quark-gluon plasma (QGP), explore questions and predictions for the LHC program, and examine the physics opportunities of the LHC using information from the forward region. By surveying the difficult challenges of the LHC development while also assessing the novel processes that the LHC will perform, Large Hadron Collider Phenomenology aids less seasoned physicists as well as existing researchers in discovering the numerous possibilities of the LHC.

Searches for New Physics at Colliders

Author:
Publisher: Stanford University
ISBN:
Format: PDF
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The turning-on of the Large Hadron Collider is the momentous milestone in our quest for new physics beyond the Standard Model. Soon, we will be presented with the task of detecting, identifying, and studying the possibly large parameter space of the underlying model. In this thesis, we will look at some possible extensions to the SM, their signatures at colliders, and possible search strategies to explore the new physics in a model-independent way. In chapter 2, we study the extended neutral gauge sector of the Littlest Higgs model at the 500 GeV e+e- collider using the fermion pair production and Higgs associate production channel. We find that these channels can provide an accurate determination of the fundamental parameters and thus allows the verification of the little Higgs mechanism designed to cancel the Higgs mass quadratic divergence. In chapter 3, we study the ATLAS supersymmetry searches proposed for the 14 TeV pp collider using the $\sim$ 70k models of the phenomenological Minimal Supersymmetric Model (pMSSM) moldel set, that have survived many theoretical and experimental constraints. Since pMSSM does not make any simplifying assumptions about its SUSY-breaking mechanism at high scale, this encompasses a broad class of Supersymmetric models. We find that even though these searches were optimized mostly for mSUGRA signals, they are relatively robust in observing the more general pMSSM models. For the case of models in which squarks and gluinos have mass below 1 TeV, essentially all of these models ($> 99\%$) were observable in at least one of these searches, with 1 $fb^{-1}$ of integrated luminosity allowing for an uncertainty of 50\% in the SM background. We found that 0-lepton searches are the most powerful searches, while searches with 1-2 leptons do not have coverage as good as has been shown for mSUGRA. We then study possible reasons why a model could not be observed. These difficult models mostly include those with long-lived charginos which lead to small Missing Tranverse Energy (MET) and models with squeezed spectra which lead to soft jets that fail the jet cuts. In chapter 4, we study similar searches that have been carried out by ATLAS at the 7 TeV LHC. We found that systematic uncertainty again plays an important role in determining the coverage of the searches. This is especially true for searches with a large SM background, such as $n$-jet 0 lepton searches. We study the implication of a null result from the 7 TeV LHC. We find that the degree of fine-tuning in the pMSSM depends on the prior in which we scan our 19-dimensional space, but overall it is not as large as in mSUGRA. We find that a null result at the 7 TeV with $10 fb^{-1}$ and 20\% systematic errors would imply a need for a higher energy e+e- machine than the 500 GeV ILC to study Supersymmetry. Continuing on along the line of Supersymmetry, in chapter 5 we explore the possibility of adding one more generation to the MSSM (4GMSSM). We find that the CP-odd A boson can be very light due to the contribution of the heavy 4th generation fermion loops while all other Higgs particles (including the CP-even {\it h}) are all quite heavy. The parameter $tan(\beta)$ is strongly constrained to be between 0.5 and 2 due to perturbativity requirements on Yukawa couplings. We study the electroweak constraints as well as collider signatures on the possibility of a light A of mass $\sim$115 GeV. As for an LHC discovery, we find that this light A can be seen in the standard 2-photon Higgs search channel with cross-section more than an order of magnitude greater than that of the SM Higgs. In the last two chapters, we study possible search strategies to explore the new physics in a model-independent way. In chapter 6, we attempt to show how one could be largely agnostic about the underlying model in exploring the complete kinematically-allowed parameter space of pair-produced color octet particles (with mass $m_{\tilde{g}}$) that each directly decay into two

Odyssee im Zeptoraum

Author: Gian Francesco Giudice
Publisher: Springer-Verlag
ISBN: 3642223958
Format: PDF, Kindle
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Der Band lädt Leser ein, die Teilchenphysik mit den Augen eines Insiders zu betrachten, dadurch bieten sich neue Einblicke in die Welt der Teilchen und ihrer Wechselwirkungen. Aufschlussreich und unterhaltsam thematisieren die Autoren die Geschichte des Large Hadron Collider (LHC) und erläutern die mit dem LHC verknüpften wissenschaftlichen Fragen: Existiert das mysteriöse Higgs-Teilchen wirklich? Erstreckt sich der Raum in zusätzliche Dimensionen? Das Buch verhilft dazu, die Entdeckungen der kommenden Jahre mitzuverfolgen und nachzuvollziehen.

QCD Higher Order Effects and Search for New Physics

Author: Jian Wang
Publisher: Springer
ISBN: 3662486733
Format: PDF, Kindle
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This book mainly investigates the precision predictions on the signal of new physics at the Large Hadron Collider (LHC) in the perturbative Quantum Chromodynamics (QCD) scheme. The potential of the LHC to discover the signal of dark matter associated production with a photon is studied after including next-to-leading order QCD corrections. The factorization and resummation of t-channel top quark transverse momentum distribution in the standard model at both the Tevatron and the LHC with soft-collinear effective theory are presented. The potential of the early LHC to discover the signal of monotops is discussed. These examples illustrate the method of searching for new physics beyond what is known today with high precision.

Search Strategies for New Physics at the LHC

Author:
Publisher: Stanford University
ISBN:
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The LHC is in the frontline of experimental searches for New Physics beyond the Standard Model of Particle Physics. Its power is accompanied by no smaller challenges in analyzing and interpreting its results. In this thesis I explore ways to parameterize new physics phenomena, design search strategies that are sensitive to them, and interpret experimental results in general new physics contexts. In particular, I discuss interpretations of the first ATLAS analysis for supersymmetry with 70/nb of integrated luminosity. I also carry a careful investigation of comprehensive search strategies for new physics with jets and missing energy signatures, and estimate the sensitivity bounds of the 7 TeV LHC to new colored particles decaying to jets and and a neutral particle that escapes detection. Finally, I discuss the implications of the recent LHC excesses hinting to a Higgs boson with mass in the range 142-147 GeV. If confirmed, this range for the Higgs mass will be an important evidence for Split Supersymmetry. I work out the phenomenological predictions of this scenario that will be tested in the very near future by a variety of experiments, including direct and indirect dark matter detection, EDM experiments searching for CP violation and the 7 TeV run of the LHC.

Quantum Aspects of Black Holes

Author: Xavier Calmet
Publisher: Springer
ISBN: 3319108522
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Beginning with an overview of the theory of black holes by the editor, this book presents a collection of ten chapters by leading physicists dealing with the variety of quantum mechanical and quantum gravitational effects pertinent to black holes. The contributions address topics such as Hawking radiation, the thermodynamics of black holes, the information paradox and firewalls, Monsters, primordial black holes, self-gravitating Bose-Einstein condensates, the formation of small black holes in high energetic collisions of particles, minimal length effects in black holes and small black holes at the Large Hadron Collider. Viewed as a whole the collection provides stimulating reading for researchers and graduate students seeking a summary of the quantum features of black holes.