Download or read book Higgs Phenomenology in Warped Extra Dimensions written by Nima Pourtolami and published by . This book was released on 2015 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is a study on phenomenology of beyond the Standard Model in the context of warped extra-dimensional (Randall-Sundrum) models. These models, through introducing a large extra space dimension along which the standard model fields can propagate, can address the hierarchy between the Plank and weak scales, provided that the geometry is suitably curved along the fifth dimension and the extra dimension is stabilized. The space-time background that is considered in this thesis is mainly in a more general form which is modified from the usual AdS5. This modification can alleviate considerably the bounds coming from precision electroweak tests and flavor physics. Of course, the usual AdS5 geometry is a special case and can be reproduced by taking the correct limits. In this thesis, we mainly consider the case where the extra dimension is bounded by two stabilized hard walls (branes) at the TeV (IR brane) and Plank (UV brane) scales. Also our principal consideration will be the case when all the standard model fields propagate in the bulk, although we comment on the case where only the Higgs is localized on the TeV brane. Within this context, after a broad review of the main concepts, we first address the phenomenology of a bulk scalar Higgs boson, and calculate its production cross section at the LHC as well as its tree-level effects on mediating flavor changing neutral currents. We perform the calculations based on two different approaches. First, we compute our predictions analytically by considering all the degrees of freedom emerging from the dimensional reduction (the infinite tower of Kaluza-Klein modes (KK)). In the second approach, we perform our calculations numerically by considering only the effects caused by the first few KK modes, present in the 4-dimensional effective theory. In the case of a Higgs leaking far from the brane, both approaches give the same predictions as the effects of the heavier KK modes decouple. However, as the Higgs boson is pushed towards the TeV brane, the two approaches seem to be equivalent only when one includes heavier and heavier degrees of freedom (which do not seem to decouple). To reconcile these results it is necessary to introduce a type of higher derivative operator which essentially encodes the effects of integrating out the heavy KK modes and dresses the brane Higgs so that it looks just like a bulk Higgs. Secondly we calculate the production rate of the Higgs boson at the LHC in the context of general 5D warped scenarios, and show that it is generically consistent with the current experimental results from the LHC for Kaluza-Klein (KK) masses as low as 2 TeV, unlike in pure AdS5 scenarios, where for the same masses, the Higgs production typically receives corrections too large to be consistent with LHC data. Thus the new pressure on warped models arising from LHC Higgs data is also alleviated in modified AdS5 warped scenarios. And finally we show that in these backgrounds, high energy flavor symmetries are inherent. When these high energy symmetries are broken at lower energies, they produce the Standard Model (SM) structure including the neutrinos. This feature is completely general and depends neither on the details of the background metric, as long as it produces the required hierarchy, nor on the exact form of the symmetry, as long as it produces the required PMNS matrix. The reason for this phenomena is inherent in the structure of the exponential hierarchy factors of warped extra-dimension scenarios with bulk matter fields. While these factors produce the hierarchy of masses in quarks and charged lepton sectors, they flatten in to a plateau at larger c-parameters to accommodate the neutrinos. In the case of the quark and charged lepton sectors, these exponential hierarchy factors ?wash off? the structure of the order one five dimensional Yukawa couplings, and naturally produce the hierarchical masses and the CKM matrix, while for the neutrinos sector, while for the neutrinos, the structure of the high energy symmetries are preserved to attain the SM.
Download or read book Gauge Higgs Unification Phenomenology in Warped Extra Dimensions written by Nausheen Raees Shah and published by . This book was released on 2009 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Ref. [1], we computed this effective potential and demonstrated that electroweak symmetry breaking may be realized, with a Higgs mass in the range mh & sim; 120--170 GeV. Moreover, this leads to the proper generation of the top and bottom quark masses for the same region of bulk mass parameters that lead to good agreement with experimental data, including radiative corrections, in the presence of a light Higgs. In addition, we computed the masses of the first few excited modes of the top, and showed that the t1 was light enough to be produced by the decay of the first excited gluon, G1.
Download or read book Collider Phenomenology of Gauge Higgs Unification Scenarios in Warped Extra Dimensions written by and published by . This book was released on 2007 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phenomenology of the Electroweak Sector in Warped supersymmetric Extra dimensional Models written by Charles Bouchart and published by . This book was released on 2010 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ln the framework of warped extra dimension models addressing the gauge hierarchy problem, we consider the Randall-Sundrum scenario under the usual hypothesis of a bulk custodial symmetry protecting the model from large ElectroWeak corrections together with a Higgs field localized on the so-called TeV-brane. After reviewing the basics of field theory in extra dimensions, we introduce the RS framework, and show in details the construction of our phenomenological model as well as the effects of EW symmetry breaking. We determine the several minimal quark representations allowing to address the anomalies in the forward-backward b-quark asymmetry. It is then shown in details that there can exist large corrections to the Higgs boson Vacuum Expectation Value induced by mixings of the gauge bosons with their KK excitations. The connection with EW precision tests is developed. We find possibly substantial RS corrections to the various Higgs couplings able to affect its phenomenology. The end of this thesis is dedicated to SuperSymmetric extension of warped models, the Higgs field still being confined on the TeV-brane.
Download or read book Phenomenology of Diffractive Higgs Production and Large Extra Dimensions written by Malin Sjödahl and published by . This book was released on 2006 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Collider Phenomenology of Higgs Bosons in Left RightSymmetric Randall Sundrum Models written by B. Lillie and published by . This book was released on 2005 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We study the corrections to Higgs physics in a model of a single warped extra dimension with all fields except the Higgs in the bulk, and a gauge symmetry extended to SU(2){sub L} x SU(2){sub R} x U(1){sub B-L}. We find that generically the Higgs coupling to electroweak gauge boson pairs is suppressed, the coupling to gluons is enhanced, and the coupling to photons is often suppressed, but can be enhanced.
Download or read book HIGGS AND RADION PHENOMENOLOGY BEYOND THE STANDARD MODEL written by Beste / B. K. Korutlu and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LHC Phenomenology written by Einan Gardi and published by Springer. This book was released on 2014-08-27 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers a very broad spectrum of experimental and theoretical activity in particle physics, from the 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 realised in heavy-ion collisions. Starting with a basic introduction to the Standard Model and its most likely extensions, the opening section of the book presents an overview of the theoretical and phenomenological framework of hadron collisions and current theoretical models of frontier physics. In part II, discussion of the theory is supplemented by chapters on the detector capabilities and search strategies, as well as an overview of the main detector components, the initial calibration procedures and physics samples and early LHC results. Part III completes the volume with a description of the physics behind Monte Carlo event generators and a broad introduction to the main statistical methods used in high energy physics. LHC Phenomenology covers all of these topics at a pedagogical level, with the aim of providing young particle physicists with the basic tools required for future work on the various LHC experiments. It will also serve as a useful reference text for those working in the field.
Download or read book Particle Physics of Brane Worlds and Extra Dimensions written by Sreerup Raychaudhuri and published by Cambridge University Press. This book was released on 2016-04-25 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: The possibility that we live in a higher-dimensional world with spatial dimensions greater than three started with the early work of Kaluza and Klein. However, in addressing experimental constraints, early model-builders were forced to compactify these extra dimensions to very tiny scales. With the development of brane-world scenarios it became possible to consider novel compactifications which allow the extra dimensions to be large or to provide observable effects of these dimensions at experimentally accessible energy scales. This book provides a comprehensive account of these recent developments, keeping the high-energy physics implications in focus. After an historical survey of the idea of extra dimensions, the book deals in detail with models of large extra dimensions, warped extra dimensions and other models such as universal extra dimensions. The theoretical and phenomenological implications are discussed in a pedagogical manner for both researchers and graduate students.
Download or read book Perspectives on LHC Physics written by Aaron Pierce and published by World Scientific. This book was released on 2008 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Perspectives On String Phenomenology written by Gordon Kane and published by World Scientific. This book was released on 2014-12-23 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: The remarkable recent discovery of the Higgs boson at the CERN Large Hadron Collider completed the Standard Model of particle physics and has paved the way for understanding the physics which may lie beyond it. String/M theory has emerged as a broad framework for describing a plethora of diverse physical systems, which includes condensed matter systems, gravitational systems as well as elementary particle physics interactions. If string/M theory is to be considered as a candidate theory of Nature, it must contain an effectively four-dimensional universe among its solutions that is indistinguishable from our own. In these solutions, the extra dimensions of string/M theory are “compactified” on tiny scales which are often comparable to the Planck length. String phenomenology is the branch of string/M theory that studies such solutions, relates their properties to data, and aims to answer many of the outstanding questions of particle physics beyond the Standard Model.This book contains perspectives on string phenomenology from some of the leading experts in the field. Contributions will range from pedagogical general overviews and perspectives to more technical reviews. We hope that the reader will get a sense of the significant progress that has been made in the field in recent years (e.g. in the topic of moduli stabilization) as well as the topics currently being researched, outstanding problems and some perspectives for the future.
Download or read book Workshop on CP Studies and Non standard Higgs Physics written by European Organization for Nuclear Research and published by . This book was released on 2006 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Higgs Production and Decay in Models of a Warped Extra Dimension with a Bulk Higgs written by and published by . This book was released on 2015 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Warped extra-dimension models in which the Higgs boson is allowed to propagate in the bulk of a compact AdS5 space are conjectured to be dual to models featuring a partially composite Higgs boson. They offer a framework with which to investigate the implications of changing the scaling dimension of the Higgs operator, which can be used to reduce the constraints from electroweak precision data. In the context of such models, we calculate the cross section for Higgs production in gluon fusion and the H → [gamma][gamma] decay rate and show that they are finite (at one-loop order) as a consequence of gauge invariance. The extended scalar sector comprising the Kaluza-Klein excitations of the Standard Model scalars is constructed in detail. The largest effects are due to virtual KK fermions, whose contributions to the cross section and decay rate introduce a quadratic sensitivity to the maximum allowed value y* of the random complex entries of the 5D anarchic Yukawa matrices. We find an enhancement of the gluon-fusion cross section and a reduction of the H → [gamma][gamma] rate as well as of the tree-level Higgs couplings to fermions and electroweak gauge bosons. We perform a detailed study of the correlated signal strengths for different production mechanisms and decay channels as functions of y*, the mass scale of Kaluza-Klein resonances and the scaling dimension of the composite Higgs operator.
Download or read book Gauge Higgs Unification Neutrino Masses and Dark Matter in Warped Extra Dimensions written by and published by . This book was released on 2009 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics of the Large and the Small written by Csaba Cs ki and published by World Scientific. This book was released on 2011 with total page 851 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a set of pedagogical lectures that introduce particle physics beyond the standard model and particle cosmology to advanced graduate students.
Download or read book Phenomenology of the Mixed Higgs radion System in the Compact Randall Sundrum Scenario written by Manuel Toharia and published by . This book was released on 2004 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Strong Coupling Gauge Theories in LHC Era written by H. Fukuya and published by World Scientific. This book was released on 2011 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the Workshop is to have intensive discussions on both theoretical and phenomenological aspects of strong coupling gauge theories (SCGTs), with particular emphasis on the model buildings to be tested in the LHC experiments. Dynamical issues are discussed in lattice simulations and various analytical methods. This proceedings volume is a collection of the presentations made at the Workshop by many leading scientists in the field.
