The new theory correctly predicts the globular cluster black hole masses, that the so-called 'dark matter' networks revealed via weak gravitational lensing are caused by quantum-foam vortex filaments, and that the 'frame-dragging' ...
Author: J. Val Blain
Publisher: Nova Publishers
It is generally believed that most of the matter in the universe is dark, i.e. cannot be detected from the light which it emits (or fails to emit). Its presence is inferred indirectly from the motions of astronomical objects, specifically stellar, galactic, and galaxy cluster/supercluster observations. It is also required in order to enable gravity to amplify the small fluctuations in the cosmic microwave background enough to form the large-scale structures that we see in the universe today. For each of the stellar, galactic, and galaxy cluster/supercluster observations the basic principle is that if we measure velocities in some region, then there has to be enough mass there for gravity to stop all the objects flying apart. Dark matter has important consequences for the evolution of the universe and the structure within it. According to general relativity, the universe must conform to one of three possible types: open, flat, or closed. The total amount of mass and energy in the universe determines which of the three possibilities applies to the universe. In the case of an open universe, the total mass and energy density (denoted by the Greek letter Ù) is less than unity. If the universe is closed, Ù is greater than unity. For the case where Ù is exactly equal to one the universe is "flat". This new book details leading-edge research from around the globe.
Dark Matter: An Introduction tackles the rather recent but fast-growing subject of astroparticle physics, encompassing three main areas of fundamental physics: cosmology, particle physics, and astrophysics. Accordingly, the book discusses symmetries, conservation laws, relativity, and cosmological parameters and measurements, as well as the astrophysical behaviors of galaxies and galaxy clusters that indicate the presence of dark matter and the possible nature of dark matter distribution. This succinct yet comprehensive volume: Addresses all aspects essential to the study of dark matter Explores particle candidates for cold dark matter beyond the theory of the standard model, providing examples of basic extensions and introducing theories such as supersymmetry and extra dimensions Explains—in simple text and mathematical formulations—calculation of the freeze-out temperature of a dark matter species and its relic density Provides theoretical background for dark matter scattering off a target, event rate calculation, and dark matter annihilation essential to study direct and indirect detection of dark matter Complete with a detailed review of the latest dark matter experiments and techniques, Dark Matter: An Introduction is an ideal text for beginning researchers in the field as well as for general readers with an inquisitive mind, as the important topic of astroparticle physics is treated both pedagogically and with deeper insight.
Author: Hans-Volker Klapdor-KleingrothausPublish On: 2006-02-23
Cold Dark Matter (CDM) makes up 23% of the energy of the universe, as deduced from the WMAP measurements of the temperature anisotropies in the Cosmic microwave Background, in combination with data on the Hubble expansion and the ...
Author: Hans-Volker Klapdor-Kleingrothaus
Publisher: Springer Science & Business Media
TheFifthHEIDELBERGInternationalConferenceonDarkMatterinAst- and Particle Physics, DARK 2004, took place at Texas A&M University, College Station Texas, USA, October 3–9, 2004. It was, after Cape Town 2002, the second conference of this series held outside Germany. The earlier meetings, starting in 1996, were held in Heidelberg. Dark Matter is still one of the most exciting and central ?elds of ast- physics, particle physics and cosmology. The conference covered, as usual for this series, a large range of topics, theoretical and experimental. Theoretical talks covered SUSY/SUGRA phenomenology, which provides at present a preferred theoretical framework for the existence of cold dark matter. Also included were other possible explanations of dark matter such as SUSY Q balls, exciting New Symmetries, etc. The most important experiments in the underground search for cold and hot dark matter were presented. Talks describing the current experimental dark matter bounds, what might be obtained in the near future, and the reach of future large (i.e. one ton) detectors were given. The potential of future colliders to correlate accelerator physics with dark matter searches was also outlined. Thus the reader will be able to see the present status and future prospects in the search for dark matter. The exciting astronomical evidence for dark matter and corresponding observations concerning the Milky Way’s black hole, high-redshift clusters, wakes in dark matter halos were other important topics at the conference.
G. Barello, S. Chang, and C. A. Newby, “A model independent approach to inelastic dark matter scattering,” Phys. Rev. D90 no. 9 (2014) 094027. D.Tucker-SmithandN.Weiner,“Inelasticdarkmatter,” Phys. Rev. D64(2001) 043502.
Author: Stefano Profumo
Publisher: World Scientific Publishing Company
What is the dark matter that fills the Universe and binds together galaxies? How was it produced? What are its interactions and particle properties? The paradigm of dark matter is one of the key developments at the interface of cosmology and elementary particle physics. It is also one of the foundations of the standard cosmological model. This book presents the state of the art in building and testing particle models for dark matter. Each chapter gives an analysis of questions, research directions, and methods within the field. More than 200 problems are included to challenge and stimulate the reader's knowledge and provide guidance in the practical implementation of the numerous "tools of the trade" presented. Appendices summarize the basics of cosmology and particle physics needed for any quantitative understanding of particle models for dark matter. This interdisciplinary textbook is essential reading for anyone interested in the microscopic nature of dark matter as it manifests itself in particle physics experiments, cosmological observations, and high-energy astrophysical phenomena: from graduate students and advanced undergraduates to cosmologists and astrophysicists interested in particle models for dark matter and particle physicists interested in early-universe cosmology and high-energy astrophysics. Request Inspection Copy
Author: Miguel A. Sánchez-CondePublish On: 2020-05-28
Kahlhoefer, F. Review of LHC Dark Matter Searches. Int. J. Mod. Phys. 2017, A32, 1730006. [CrossRef] 7. Cerdeno, D.G.; Green, A.M. Direct detection of WIMPs. In Particle Dark Matter: Observations, Models and Searches; ...
Author: Miguel A. Sánchez-Conde
An important, open research topic today is to understand the relevance that dark matter halo substructure may have for dark matter searches. In the standard cosmological model, halo substructure or subhalos are predicted to be largely abundant inside larger halos, for example, galaxies such as ours, and are thought to form first and later merge to form larger structures. Dwarf satellite galaxies—the most massive exponents of halo substructure in our own galaxy—are already known to be excellent targets for dark matter searches, and indeed, they are constantly scrutinized by current gamma-ray experiments in the search for dark matter signals. Lighter subhalos not massive enough to have a visible counterpart of stars and gas may be good targets as well, given their typical abundances and distances. In addition, the clumpy distribution of subhalos residing in larger halos may boost the dark matter signals considerably. In an era in which gamma-ray experiments possess, for the first time, the exciting potential to put to test the preferred dark matter particle theories, a profound knowledge of dark matter astrophysical targets and scenarios is mandatory should we aim for accurate predictions of dark matter-induced fluxes for investing significant telescope observing time on selected targets and for deriving robust conclusions from our dark matter search efforts. In this regard, a precise characterization of the statistical and structural properties of subhalos becomes critical. In this Special Issue, we aim to summarize where we stand today on our knowledge of the different aspects of the dark matter halo substructure; to identify what are the remaining big questions, and how we could address these; and, by doing so, to find new avenues for research.
The dark matter, being both cold and collisionless, would “like” to grow as δdark ∝ a, and is prevented only by the rapid expansion (dominated by the radiation); the perturbations turn out to grow, but only logarithmically (δdark ...
Author: John N. Bahcall
Publisher: World Scientific
If standard gravitational theory is correct, then most of the matterin the universe is in an unidentified form which does not emit enoughlight to have been detected by current instrumentation. This book isthe second editon of the lectures given at the 4th Jerusalem WinterSchool for Theoretical Physics, with new material added. The lecturesare devoted to the missing matter problem in the universe, thesearch to understand dark matter. The goal of this volume is to makecurrent research work on unseen matter accessible to students withoutprior experience in this area and to provide insights for experts inrelated research fields. Due to the pedagogical nature of the originallectures and the intense discussions between the lecturers and thestudents, the written lectures included in this volume often containtechniques and explanations not found in more formal journalpublications.
Indirect Dark Matter Searches versus Cosmic Ray Transport Model Uncertainties I. Gebauer Signatures of Dark Matter Annihilation in the Light of PAMELA/ATIC Anomaly K. Nakayama Searching for Dark Matter Annihilation in X-Rays and ...
A detailed reinterpretation of this and two other ATLAS searches for Dark Matter was presented subsequently. Three different Simplified Models were considered and a large range of parameters was tested. The study revealed that the ...
Author: Johanna Gramling
This book discusses searches for Dark Matter at the CERN’s LHC, the world’s most powerful accelerator. It introduces the relevant theoretical framework and includes an in-depth discussion of the Effective Field Theory approach to Dark Matter production and its validity, as well as an overview of the formalism of Simplified Dark Matter models. Despite overwhelming astrophysical evidence for Dark Matter and numerous experimental efforts to detect it, the nature of Dark Matter still remains a mystery and has become one of the hottest research topics in fundamental physics. Two searches for Dark Matter are presented, performed on data collected with the ATLAS experiment. They analyze missing-energy final states with a jet or with top quarks. The analyses are explained in detail, and the outcomes and their interpretations are discussed, also in view of the precedent analysis of theoretical approaches. Given its depth of coverage, the book represents an excellent reference guide for all physicists interested in understanding the theoretical and experimental considerations relevant to Dark Matter searches at the LHC.
Author: Nicolas Maximilian KöhlerPublish On: 2019-09-13
Dark. Matter. As stated in Sect.4.2, the LSP is a stable particle. In addition, it has to be electrically neutral and cannot carry any colour charge [11, 18]. Thus, the LSP brings all basic requirements of a Dark Matter candidate.
Author: Nicolas Maximilian Köhler
Publisher: Springer Nature
Astrophysical observations implying the existence of Dark Matter and Dark Energy, which are not described by the Standard Model (SM) of particle physics, have led to extensions of the SM predicting new particles that could be directly produced at the Large Hadron Collider (LHC) at CERN. Based on 2015 and 2016 ATLAS proton-proton collision data, this thesis presents searches for the supersymmetric partner of the top quark, for Dark Matter, and for DarkEnergy, in signatures with jets and missing transverse energy. Muon detection is key to some of the most important LHC physics results, including the discovery of the Higgs boson and the measurement of its properties. The efficiency with which muons can be detected with the ATLAS detector is measured using Z boson decays. The performance of high-precision Monitored Drift Tube muon chambers under background rates similar to the ones expected for the High Luminosity-LHC is studied.
Proceedings of the 10th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe, February 22-24, 2012, Marina del Rey, California David Cline. Cosmological N-body simulations predict the existence of many ...
Author: David Cline
Publisher: Springer Science & Business Media
These proceedings provide the latest results on dark matter and dark energy research. The UCLA Department of Physics and Astronomy hosted its tenth Dark Matter and Dark Energy conference in Marina del Rey and brought together all the leaders in the field. The symposium provided a scientific forum for the latest discussions in the field. Topics covered at the symposium: •Status of measurements of the equation of state of dark energy and new experiments •The search for missing energy events at the LHC and implications for dark matter search •Theoretical calculations on all forms of dark matter (SUSY, axions, sterile neutrinos, etc.) •Status of the indirect search for dark matter •Status of the direct search for dark matter in detectors around the world •The low-mass wimp search region •The next generation of very large dark matter detectors •New underground laboratories for dark matter search
What is dark matter? How exactly are stars created? In 1998, it was determined from supernova studies that the expansion of the Universe was accelerating, thereby creating the mystery of dark energy. Astrophysicists ...
Author: Jerome Drexler
Through use of a lecture-slide format, this book presents an astrophysics detective story that chronicles Jerome Drexler's literature search for astronomical clues and evidence to unveil the nature of dark matter. There are a number of mysteries in astrophysics and cosmology that have remained unsolved for decades. What is dark matter? How exactly are stars created? In 1998, it was determined from supernova studies that the expansion of the Universe was accelerating, thereby creating the mystery of dark energy. Astrophysicists have developed mutually exclusive, single-phenomenon theories for each of these three phenomena, but not a unified theory for all three of them. The author's original goal was to identify dark matter, a decades-old mystery. In the process, he developed a new theory for dark matter and illuminated the nature of dark energy and the process of Sun formation. Since dark matter may have been instrumental in the creation of galaxies and stars, the author decided to test his new dark matter theory on the formation of the Sun. The results were very encouraging. He next sought a possible link between dark matter and the accelerating expansion of the Universe, which is attributed to the mysterious dark energy. Using his dark matter theory and the laws of physics, the author explained the accelerating expansion of the Universe in a plausible manner. This book chronicles the author's search for a unified astrophysical theory and how it finally evolved.
Author: Holly Marie Pollard-WrightPublish On: 2019-02-01
An inhabiter is one of many countless darkmatter focal points within the universe's substrate layer that came into existence fluctuating with a surface of vibrating imprint strings.31 When dark matter and normal matter interact, ...
Author: Holly Marie Pollard-Wright
Publisher: Lulu Press, Inc
The reader takes a journey through black holes, nerve terminals, the computer brain, and the psyche. Based on years of analyzing scientific theory and spiritual teachings, the author has written a work that explains difficult concepts that shape and unify the universe. Throughout the book, the author highlights how dark energy and normal energy interact with the universe, how these forms of energy differ, and how individual structures of the computer brain have their own programs. A key point is that everything that constitutes our reality is, in actuality, energy forms interacting. Using the Wachowskis’ Matrix movies to bridge between the scientific and the theoretical, the movies take place in a world where “reality” is the product of a projection by artificial intelligence. Life and the Aura of Perpetual Impermanence is a fascinating metaphysical treatise on the nature of the universe and our existence—one that helps us understand how we exist within our realities.
XO(my—mE)f(mi/mc)(10—40cm2 XzaiZBf<NZ>fi events/kt yr (1) i f for contained v events, where pL is the local halo density, 17 is the three-dimensional velocity dispersion of the dark-matter particles, mC is a critical mass , ...
Author: M. Srednicki
At least eighty percent of the mass of the universe consists of some material which, unlike ordinary matter, neither emits nor absorbs light. This book collects key papers related to the discovery of this astonishing fact and its profound implications for astrophysics, cosmology, and the physics of elementary particles. The book focuses on the likely possibility that the dark matter is composed of an as yet undiscovered elementary particle, and examines the boundaries of our present knowledge of the properties such a particle must possess.
Cosmic Rays and Dark Matter Edited by Yasushi Muraki This volume contains the DOCeedings of a conference that was held at Nagoya University in July 2003 on the twin opics of Cosmic rays and dark matter. Although these topics might ...
The Official Journal of the Committee on Space Research ( COSPAR ) A Scientific Committee of the International Council for Science ( ICSU ) VOLUME 42 , NUMBER 3 COSMIC RAYS IN THE GALAXY , BLACK HOLES , DARK MATTER AND DARK ENERGY DARK ...
Three generations of women take over the family funeral-home and PI businesses in the first book of a taut, page-turning and darkly funny new series.
Author: Doug Johnstone
Category: Detective and mystery stories
Three generations of women from the Skelfs family take over the family funeral home and PI businesses in the first book of a taut, page-turning and darkly funny new series. 'I was addicted from the first page; gripping, gritty and darkly funny as hell' Erin Kelly 'A Dark Matter showcases a writer at the peak of his powers, except that with every book, Doug Johnstone just gets better' Val McDermid 'Emotionally complex, richly layered and darkly funny. An addictive blend of Case Histories and Six Feet Under' Chris Brookmyre _________________ Meet the Skelfs: well-known Edinburgh family, proprietors of a long-established funeral-home business, and private investigators... When patriarch Jim dies, it's left to his wife Dorothy, daughter Jenny and granddaughter Hannah to take charge of both businesses, kicking off an unexpected series of events. Dorothy discovers mysterious payments to another woman, suggesting that Jim wasn't the husband she thought he was. Hannah's best friend Mel has vanished from university, and the simple adultery case that Jenny takes on leads to something stranger and far darker than any of them could have imagined. As the women struggle to come to terms with their grief, and the demands of the business threaten to overwhelm them, secrets from the past emerge, which change everything... A compelling, tense and shocking thriller and a darkly funny and warm portrait of a family in turmoil, A Dark Matter introduces a cast of unforgettable characters, marking the start of an addictive new series. _________________ 'A fiendish mystery that is also deeply moving and laced with suitably dark humour ... set to be one of the books of the year' Mark Billingham 'This dark but touching thriller makes for a thoroughly enjoyable slice of Edinburgh noir' Mary Paulson-Ellis 'A tense ride ... strong, believable characters' Kerry Hudson, Big Issue
Timothy Walsh's study of the function and significance of absence in literature demonstrates its centrality in terms of both literary technique and philosophical consequence.
Author: Timothy Walsh
Publisher: SIU Press
Category: Literary Collections
Timothy Walsh's study of the function and significance of absence in literature demonstrates its centrality in terms of both literary technique and philosophical consequence. Textual gaps, narrative lacunae, and strategic vagueness, together with the uncertainties that such devices inevitably generate, have been essential elements of literature from Lao-Tzu to Lawrence, from Chaucer to Faulkner and beyond. Walsh finds that poststructural approaches to indeterminacy tend to overlook the specific and productive roles that absence and uncertainty often play within the overall design of a work. The aesthetic generation of uncertainty, he demonstrates, is not a roadblock on the path to meaning or a sign of some radical and suppressed internal contradiction; rather, it is as basic an artistic aim as the desire to evoke sympathy, laughter, or outrage. Coining the phrase "structured absence" to explain a central tenet in his discussion of the "mechanics" of uncertainty, Walsh analyzes various literary devices and tropes involved in generating a felt sense of absence and a purposeful uncertainty. Structured absences, he demonstrates, combine to form intricate patterns and networks, which explains how the dynamic potential of uncertainty can increase exponentially through a deft orchestration of absence. Walsh argues that the use of absence in works of art--of silence, shadow, blankness, and void--is a principal means by which the inherent biological limitations of human consciousness and of human language are encoded in aesthetic constructs. Because of the limitations of our senses and because we often are more attuned to what lies beyond the threshold of perceptual limits, the lacunae in artistic works represent attempts to replicate the real and inescapable limits of human experience.
we deduced that dark matter is non-baryonic. It must also be stable against decay, at least on the timescale of the lifetime of the Universe, otherwise it could not change gravitational observations today.
Author: Adnan Ghribi
Publisher: BoD – Books on Demand
The twentieth century elevated our understanding of the Universe from its early stages to what it is today and what is to become of it. Cosmology is the weapon that utilizes all the scientific tools that we have created to feel less lost in the immensity of our Universe. The standard model is the theory that explains the best what we observe. Even with all the successes that this theory had, two main questions are still to be answered: What is the nature of dark matter and dark energy? This book attempts to understand these questions while giving some of the most promising advances in modern cosmology.