Decaying Vs Annihilating Dark Matter In Light Of A Tentative Gamma Ray Line
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Decaying Vs Annihilating Dark Matter In Light Of A Tentative Gamma Ray Line
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Author : Wilfried Buchmüller
language : en
Publisher:
Release Date : 2012
Decaying Vs Annihilating Dark Matter In Light Of A Tentative Gamma Ray Line written by Wilfried Buchmüller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Optimized Dark Matter Searches In Deep Observations Of Segue 1 With Magic
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Author : Jelena Aleksić
language : en
Publisher: Springer
Release Date : 2015-11-06
Optimized Dark Matter Searches In Deep Observations Of Segue 1 With Magic written by Jelena Aleksić and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-11-06 with Science categories.
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.
The Multi Messenger Approach To High Energy Gamma Ray Sources
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Author : Josep M. Paredes
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-11-12
The Multi Messenger Approach To High Energy Gamma Ray Sources written by Josep M. Paredes and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-11-12 with Science categories.
This book provides a theoretical and observational overview of the state of the art of gamma-ray astrophysics, and their impact and connection with the physics of cosmic rays and neutrinos. With the aim of shedding new and fresh light on the problem of the nature of the gamma-ray sources, particularly those yet unidentified, this book summarizes contributions to a workshop that continues today.
Matter Antimatter And Dark Matter
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Author : Roberto Battiston
language : en
Publisher: World Scientific
Release Date : 2002
Matter Antimatter And Dark Matter written by Roberto Battiston and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Science categories.
This book presents the progress in cosmic ray physics following the recent results obtained by balloon, satellite and underground experiments. The following topics are reviewed: Composition and propagation of cosmic rays, trapping of charged particles in the earth''s magnetic field, atmospheric neutrinos, and high energy photon measurements in space.
The New Cosmology
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Author : Roland E. Allen
language : en
Publisher: American Institute of Physics
Release Date : 2004-12-14
The New Cosmology written by Roland E. Allen and has been published by American Institute of Physics this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-12-14 with Science categories.
The papers in this volume examine the recent revolutionary discoveries in cosmology and astronomy, and their theoretical interpretation. The observational evidence for an accelerating universe, and an earlier decelerating phase, is brought up to date with the newest results for the most distant and oldest Type Ia supernovae. The data from the WMAP satellite provide, for the first time, true precision cosmology: reliable results for the age of the universe, its geometry, its evolution over the past 13.7 billion years, and many other features, including the proportions of ordinary matter, dark matter, and dark energy. Other papers in this volume describe the information obtained with 21st century astronomical techniques, including gravitational lensing, studies across the electromagnetic spectrum with ground-based and NASA observatories, and surveys of millions of galaxies. The results are interpreted by leading theorists using both accepted and exotic theories, including inflation and superstring theory.
An Introduction To Particle Dark Matter
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Author : Stefano Profumo
language : en
Publisher: Wspc (Europe)
Release Date : 2017
An Introduction To Particle Dark Matter written by Stefano Profumo and has been published by Wspc (Europe) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Science categories.
Particle dark matter: the name of the game -- The thermal relic paradigm: zeroth-order lessons from cosmology -- The thermal relic paradigm: a closer look -- The art of WIMP direct detection -- Indirect dark matter searches -- Searching for dark matter with particle colliders -- Axions and axion-like particles as dark matter -- Sterile neutrinos as dark matter particles -- Bestiarium: a short, biased compendium of notable dark matter particle candidates and models
Constraints On Decaying Dark Matter From The Extragalactic Gamma Ray Background
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Author : Shin'ichiro Ando
language : en
Publisher:
Release Date : 2015
Constraints On Decaying Dark Matter From The Extragalactic Gamma Ray Background written by Shin'ichiro Ando and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
A Search For Spectral Lines From Wimp Annihilation In The Milky Way Using The Fermi Large Area Telescope
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Author : Yvonne Vasetta Edmonds
language : en
Publisher:
Release Date : 2011
A Search For Spectral Lines From Wimp Annihilation In The Milky Way Using The Fermi Large Area Telescope written by Yvonne Vasetta Edmonds and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
The most popular class of dark matter candidates is the class of weakly-interacting massive particles (WIMPs). The Fermi Large Area Telescope has the possibility of indirectly detecting WIMPs by the flux from their annihilation/decay products. When a WIMP annihilates or decays directly into a photon gamma and another particle Y the photons are monochromatic. Detection of the resulting spectral line(s) would provide convincing evidence for particulate dark matter and could provide the WIMP mass. In the case of no detection, knowledge of the dark matter distribution can be used to place limits on the annihilation cross section and lifetime for the WIMP(s) to Y-gamma channel. We present the spectrum from 4.8 to 264 GeV and spectral line flux upper limits, obtained from a subset of this spectrum, from 7 to 200 GeV. The spatial region of the dataset covers a large portion of the sky, the high latitudes plus the Galactic Center. We report upper limits on the WIMP cross sections for annihilation to gamma-gamma and Z-gamma and lower limits on the WIMP lifetime for decay to gamma-neutrino. We discuss the implications of the spectrum and line flux limits for several dark matter models with optimistic branching ratios for photon channels.
Connecting Quarks With The Cosmos
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2003-03-12
Connecting Quarks With The Cosmos written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-03-12 with Science categories.
Advances made by physicists in understanding matter, space, and time and by astronomers in understanding the universe as a whole have closely intertwined the question being asked about the universe at its two extremesâ€"the very large and the very small. This report identifies 11 key questions that have a good chance to be answered in the next decade. It urges that a new research strategy be created that brings to bear the techniques of both astronomy and sub-atomic physics in a cross-disciplinary way to address these questions. The report presents seven recommendations to facilitate the necessary research and development coordination. These recommendations identify key priorities for future scientific projects critical for realizing these scientific opportunities.
Government Reports Announcements Index
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Author :
language : en
Publisher:
Release Date : 1993
Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Government publications categories.