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Detecting Dark Matter Through Galactic Collisions And An Analysis Of Non Standard Modes Of Dark Matter Production
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Book Synopsis Detecting Dark Matter Through Galactic Collisions and an Analysis of Non-standard Modes of Dark Matter Production by : Adrian Soldatenko
Download or read book Detecting Dark Matter Through Galactic Collisions and an Analysis of Non-standard Modes of Dark Matter Production written by Adrian Soldatenko and published by . This book was released on 2006 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis work combines two independent research projects tied together by a common thread, understanding the composition of dark matter. The material is divided into two sections. The first relates dark matter and ultra high energy cosmic rays. We point out that if heavy metastable particles composing the dark matter of our galaxy are responsible for the ultra-high energy cosmic rays (UHECR) then the leading tidal stream of the Sagittarius dwarf galaxy could be detected through UHECR. The signal would be an anisotropy in the UHECR flux smaller than the telltale anisotropy towards the galactic center that would first establish unstable dark matter as the origin of the UHECR. The second considers neutralinos in non-standard cosmological models. If the energy density of the Universe before nucleosynthesis is dominated by a scalar field that decays and reheats the plasma to a temperature TRH smaller than the standard neutralino freeze out temperature, the neutralino relic density differs from its standard value. In this case, the relic density depends on two additional parameters: TRH, and the number of neutralinos produced per decay---per unit mass---of the field. We numerically study the neutralino relic density as a function of these reheating parameters within minimal supersymmetric standard models and show that the dark matter constraint can almost always be satisfied. The standard cosmological scenario includes untested assumptions about the Universe before Big-Bang Nucleosynthesis. Within non-standard cosmological scenarios, in which these assumptions are changed, neutralinos in almost all supersymmetric models can have the dark matter density. We compare neutralino direct detection rates in standard cosmologies with those derived assuming that neutralinos always have the dark matter density. In this latter case, we find many more models within the reach of future direct dark matter detection experiments.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS by : Yangyang Cheng
Download or read book Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS written by Yangyang Cheng and published by Springer. This book was released on 2016-09-29 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports on the search for dark matter in data taken with the ATLAS detector at CERN’s Large Hadron Collider (LHC). The identification of dark matter and the determination of its properties are among the highest priorities in elementary particle physics and cosmology. The most likely candidate, a weakly interacting massive particle, could be produced in the high energy proton-proton collisions at the LHC. The analysis presented here is unique in looking for dark matter produced together with a Higgs boson that decays into its dominant decay mode, a pair of b quarks. If dark matter were seen in this mode, we would learn directly about the production mechanism because of the presence of the Higgs boson. This thesis develops the search technique and presents the most stringent production limit to date.
Book Synopsis Dark Sky, Dark Matter by : J.M Overduin
Download or read book Dark Sky, Dark Matter written by J.M Overduin and published by CRC Press. This book was released on 2002-09-01 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Olbers' paradox states that given the Universe is unbounded, governed by the standard laws of physics, and populated by light sources, the night sky should be ablaze with light. Obviously this is not so. However, the paradox does not lie in nature but in our understanding of physics. A Universe with a finite age, such as follows from big-bang theor
Book Synopsis The Mystery of Dark Matter by : Wolfgang Kapferer
Download or read book The Mystery of Dark Matter written by Wolfgang Kapferer and published by Springer Nature. This book was released on 2021-04-17 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get ready to embark on the exciting search for dark matter—the invisible mass that dominates our universe. This popular science book explains why this mysterious dark matter has been incorporated into the standard model of the universe and how scientists are able to “observe” the invisible. The book starts with the early indications of the existence of dark matter, including the strange cohesion of galaxy clusters, before moving on to modern observations like cosmic background radiation. Along the way, you will learn about the direct and indirect methods being used by researchers to track down dark matter and whatever is behind this strange phenomenon. The Mystery of Dark Matter will appeal to general readers who wish to understand what scientists actually know about dark matter, along with the methods they use to help crack the mystery. This book is a translation of the original German 1st edition Das Rätsel Dunkle Materie by Wolfgang Kapferer, published by Springer-Verlag GmbH Deutschland in 2018.The translation was done with the help of artificial intelligence (machine translation by the service DeepL.com). A subsequent human revision was done primarily in terms of content, so that the book will read stylistically differently from a conventional translation. Springer Nature works continuously to further the development of tools for the production of books and on the related technologies to support the authors.
Book Synopsis The Theory of Direct Dark Matter Detection by : Eugenio Del Nobile
Download or read book The Theory of Direct Dark Matter Detection written by Eugenio Del Nobile and published by Springer. This book was released on 2022-05-10 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a pedagogical guide on how to make computations in direct dark matter (DM) detection. The theory behind the calculation of direct detection cross sections and rates is presented, touching aspects related to elementary particle physics, hadronic physics, nuclear physics, and astrophysics. The book is structured in self-contained sections, covering several topics ranging from the scattering kinematics to the phenomenology of direct DM searches. It follows a model-independent approach, aiming at providing the readers with all that is needed to understand the theory and start their own analysis. Meant for graduate students and researchers with interests in particle physics and phenomenology, it is enriched with several worked examples from standard and non-standard particle DM models. Senior researchers working in different areas related to dark matter, like particle and nuclear physics, astrophysics, and cosmology, find in this book a useful and updated guide for reference.
Book Synopsis The Dark Matter Problem by : Robert H. Sanders
Download or read book The Dark Matter Problem written by Robert H. Sanders and published by Cambridge University Press. This book was released on 2010-04-22 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most astronomers and physicists now believe that the matter content of the Universe is dominated by dark matter: hypothetical particles which interact with normal matter primarily through the force of gravity. Though invisible to current direct detection methods, dark matter can explain a variety of astronomical observations. This book describes how this theory has developed over the past 75 years, and why it is now a central feature of extragalactic astronomy and cosmology. Current attempts to directly detect dark matter locally are discussed, together with the implications for particle physics. The author comments on the sociology of these developments, demonstrating how and why scientists work and interact. Modified Newtonian Dynamics (MOND), the leading alternative to this theory, is also presented. This fascinating overview will interest cosmologists, astronomers and particle physicists. Mathematics is kept to a minimum, so the book can be understood by non-specialists.
Book Synopsis Dark Matter in Astrophysics and Particle Physics by : Hans Volker Klapdor-Kleingrothaus
Download or read book Dark Matter in Astrophysics and Particle Physics written by Hans Volker Klapdor-Kleingrothaus and published by World Scientific. This book was released on 2010 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dark matter and dark energy are one of the central mysteries in modern physics, although modern astrophysical and cosmological observations and particle physics experiments can and will provide vital clues in uncovering its true nature. The DARK 2009 Conference brought together World?s leading researchers in both astrophysics and particle physics, providing an opportunity and platform to present their latest results to the community. The topics covered are wide-ranging, from terrestrial underground experiments to space experimental efforts to search for dark matter, and on the theoretical aspects, from the generating of a fifth family as origin of dark matter, extra dimensions and dark matter to non-standard Wigner classes and dark matter. One of the new highlights was certainly a possible connection between a neutrino mass as observed by nuclear double beta decay and the dark energy. Highly important and relevant in its field, the book presents a vital snapshot of the sometimes seemingly disparate areas of dark matter research and offers an exciting overview of current ideas and future directions.
Book Synopsis A Ray of Light in a Sea of Dark Matter by : Charles Keeton
Download or read book A Ray of Light in a Sea of Dark Matter written by Charles Keeton and published by Rutgers University Press. This book was released on 2014-04-30 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: What’s in the dark? Countless generations have gazed up at the night sky and asked this question—the same question that cosmologists ask themselves as they study the universe. The answer turns out to be surprising and rich. The space between stars is filled with an exotic substance called “dark matter” that exerts gravity but does not emit, absorb, or reflect light. The space between galaxies is rife with “dark energy” that creates a sort of cosmic antigravity causing the expansion of the universe to accelerate. Together, dark matter and dark energy account for 95 percent of the content of the universe. News reporters and science journalists routinely talk about these findings using terms that they assume we have a working knowledge of, but do you really understand how astronomers arrive at their findings or what it all means? Cosmologists face a conundrum: how can we study substances we cannot see, let alone manipulate? A powerful approach is to observe objects whose motion is influenced by gravity. Einstein predicted that gravity can act like a lens to bend light. Today we see hundreds of cases of this—instances where the gravity of a distant galaxy distorts our view of a more distant object, creating multiple images or spectacular arcs on the sky. Gravitational lensing is now a key part of the international quest to understand the invisible substance that surrounds us, penetrates us, and binds the universe together. A Ray of Light in a Sea of Dark Matter offers readers a concise, accessible explanation of how astronomers probe dark matter. Readers quickly gain an understanding of what might be out there, how scientists arrive at their findings, and why this research is important to us. Engaging and insightful, Charles Keeton gives everyone an opportunity to be an active learner and listener in our ever-expanding universe. Watch a video with Charles Keeton: Watch video now. (http://www.youtube.com/watch?v=Uc3byXNS1G0).
Book Synopsis An Introduction To Particle Dark Matter by : Stefano Profumo
Download or read book An Introduction To Particle Dark Matter written by Stefano Profumo and published by World Scientific Publishing Company. This book was released on 2017-02-23 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Dark Matter, Neutrinos, and Our Solar System by : Nirmala Prakash
Download or read book Dark Matter, Neutrinos, and Our Solar System written by Nirmala Prakash and published by World Scientific. This book was released on 2013 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes these issues in terms of links, between cosmology, particle and nuclear physics, as well as between cosmology, atmospheric and terrestrial physics. It studies the constituents of dark matter (classified as hot warm and cold) first in terms of their individual structures, and second, in terms of facilities available to detect these structures. Neutrinos are treated as a separate entity. The last chapter details the real-time stories about the "regions" that were not explored thus far, for lack of advanced technology. Their untold stories (which span up to 2010) are illustrated here datewise in full. The book concludes with the latest news that the Large Hadron Collider team at CERN has finally succeeded in producing 7 trillion electronic Volts of energy by creating head-on-collisions of protons and more protons (in search of God-particle).
Book Synopsis Identification Of Dark Matter, The - Proceedings Of The First International Workshop by : Neil J C Spooner
Download or read book Identification Of Dark Matter, The - Proceedings Of The First International Workshop written by Neil J C Spooner and published by World Scientific. This book was released on 1997-08-02 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: There can be little doubt now that 90-99% of the Universe comprises dark matter. Hence it is of critical importance now not just to pursue further evidence for its existence but rather to identify what the dark matter is. Assessment of progress in this area was the objective of the first International Workshop on the Identification of Dark Matter, in particular to consider what techniques, both observational and experimental, are currently being used, how successful they are now and what new techniques will improve the prospects of identifying the likely candidates. The meeting included reviews on major particle astrophysics topics in dark matter but was largely devoted to short contributed talks on new work in the field. This book is the written proceedings of the meeting.
Book Synopsis Study of the Galactic Center and Dark Matter Search with H.E.S.S. by : Lucia Rinchiuso
Download or read book Study of the Galactic Center and Dark Matter Search with H.E.S.S. written by Lucia Rinchiuso and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The H.E.S.S. (High Energy Spectroscopic System) experiment is an array of five Cherenkov telescopes that observe the sky in gamma-rays from about 100 GeV up to several ten TeV.Gamma rays are produced in violent non-thermal phenomena in the Universe in the neighborhood of pulsars, supernovae, black holes, ..., and could also be produced by the annihilation of dark matter particles.Numerous cosmological and astrophysical probes suggest that 85% of the total matter budget in the Universe is of unknown origin. This component of matter known as dark matter is non baryonic and could consist of yet undiscovered particles which privileged candidates are arguably massive particles with electroweak couplings with ordinary matter (WIMPs).Dark matter particles may annihilate into Standard Model particles in dense regions of the Universe. Among the annihilation products are photons which detection at high energy with ground-based Cherenkov telescopes could bring unique information on the nature of the dark matter.H.E.S.S. observes dark-matter-dense regions of the sky such as the Galactic Center and dwarf galaxy satellites of the Milky Way. A study on the interpretation of an excess of gamma-rays detected by H.E.S.S. at the Galactic Center in terms of acceleration of protons by a population of unresolved millisecond pulsars is performed.10 years of observations of the Galactic Center with the four-telescope H.E.S.S.-I array, five years of data taking towards the Galactic Center region with the full H.E.S.S.-II array and a two-years dataset towards newly discovered dwarf spheroidal galaxies are analyzed. The search for dark matter annihilation signals towards these targets provided the strongest limits so far on dark matter annihilation cross section in gamma rays of TeV energies. The potential of dark matter detection with the upcoming Cherenkov Telescope Array (CTA) towards the inner Galactic halo are studied. They may annihilate into Standard Model particles in dense regions of the Universe. Among the annihilation products are high energy photons. The detection of these photons with ground-based Cherenkov telescopes may reveal the nature of the dark matter. H.E.S.S. have observed some dark-matter-dense regions of the sky likethe Galactic Center and dwarf galaxies satellites of the Milky Way. In this work 10 years of observations of the Galactic Center with the four-telescopes H.E.S.S.-I array, five years of data taking towards the Galactic Center region with the full H.E.S.S.-II array and a two-years dataset towards newly discovered dwarf spheroidal galaxies are analyzed. The searches for dark matter annihilation signals towards these targets produced the strongest limits so far on dark matter annihilation cross section in gamma rays of TeV energies.Perspectives of dark matter detection with the future array CTA (Cherenkov Telescope Array) towards the inner Galactic halo are also discussed. A study on the interpretation of an excess of gamma-rays detected by H.E.S.S. at the Galactic Center in terms of acceleration of protons by a population of unresolved millisecond pulsars complements the dark matter searches.
Book Synopsis Identification Of Dark Matter, The - Proceedings Of The Fourth International Workshop by : Vitaly Kudryavtsev
Download or read book Identification Of Dark Matter, The - Proceedings Of The Fourth International Workshop written by Vitaly Kudryavtsev and published by World Scientific. This book was released on 2003-05-07 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains written versions of the presentations made at the 4th International Workshop on the Identification of Dark Matter (IDM 2002), held in York, UK, in September 2002. The objective of this workshop series is to assess the status of work attempting to identify what constitutes dark matter — in particular, to consider the techniques being used, how successful they are, and what new techniques are likely to improve prospects for identifying likely dark matter candidates in the future. At IDM 2002 special emphasis was placed on recent results obtained in searches for baryonic and non-baryonic dark matter. The proceedings include reviews of major topics on dark matter, as well as short contributed talks.
Book Synopsis Optimized Dark Matter Searches in Deep Observations of Segue 1 with MAGIC by : Jelena Aleksić
Download or read book Optimized Dark Matter Searches in Deep Observations of Segue 1 with MAGIC written by Jelena Aleksić and published by Springer. This book was released on 2015-11-06 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the results of indirect dark matter searches in the gamma-ray sky of the near Universe, as seen by the MAGIC Telescopes. The author has proposed and led the 160 hours long observations of the dwarf spheroidal galaxy Segue 1, which is the deepest survey of any such object by any Cherenkov telescope so far. Furthermore, she developed and completely characterized a new method, dubbed “Full Likelihood”, that optimizes the sensitivity of Cherenkov instruments for detection of gamma-ray signals of dark matter origin. Compared to the standard analysis techniques, this novel approach introduces a sensitivity improvement of a factor of two (i.e. it requires 4 times less observation time to achieve the same result). In addition, it allows a straightforward merger of results from different targets and/or detectors. By selecting the optimal observational target and combining its very deep exposure with the Full Likelihood analysis of the acquired data, the author has improved the existing MAGIC bounds to the dark matter properties by more than one order of magnitude. Furthermore, for particles more massive than a few hundred GeV, those are the strongest constraints from dwarf galaxies achieved by any gamma-ray instrument, both ground-based or space-borne alike.
Book Synopsis Progress in Dark Matter Research by : J. Val Blain
Download or read book Progress in Dark Matter Research written by J. Val Blain and published by Nova Publishers. This book was released on 2005 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 Omega) is less than unity. If the Universe is closed, Omega is greater than unity. For the case where Omega is exactly equal to one the Universe is "flat". This book details leading-edge research from around the globe.
Book Synopsis In Search of Dark Matter by : Ken Freeman
Download or read book In Search of Dark Matter written by Ken Freeman and published by Springer Science & Business Media. This book was released on 2006-08-25 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written for the educated non-scientist and scientist alike, it spans a variety of scientific disciplines, from observational astronomy to particle physics. Concepts that the reader will encounter along the way are at the cutting edge of scientific research. However the themes are explained in such a way that no prior understanding of science beyond a high school education is necessary.
