Searching for Dark Matter with Cosmic Gamma Rays summarizes the evidence for dark matter and what we can learn about its particle nature using cosmic gamma rays. It has almost been 100 years since Fritz Zwicky first detected hints that most of the matter in the Universe that doesn't directly emit or reflect light. Since then, the observational evidence for dark matter has continued to grow. Dark matter may be a new kind of particle that is governed by physics beyond our Standard Model of particle physics. In many models, dark matter annihilation or decay produces gamma rays. There are a variety of instruments observing the gamma-ray sky from tens of MeV to hundreds of TeV. Some make deep, focused observations of small regions, while others provide coverage of the entire sky. Each experiment offers complementary sensitivity to dark matter searches in a variety of target sizes, locations, and dark matter mass scales. We review results from recent gamma-ray experiments including anomalies some have attributed to dark matter. We also discuss how our gamma-ray observations complement other dark matter searches and the prospects for future experiments.

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This book is a new look at one of the hottest topics in contemporary science, Dark Matter. It is the pioneering text dedicated to sterile neutrinos as candidate particles for Dark Matter, challenging some of the standard assumptions which may be true for some Dark Matter candidates but not for all. So, this can be seen either as an introduction to a specialized topic or an out-of-the-box introduction to the field of Dark Matter in general. No matter if you are a theoretical particle physicist, an observational astronomer, or a ground based experimentalist, no matter if you are a grad student or an active researcher, you can benefit from this text, for a simple reason: a non-standard candidate for Dark Matter can teach you a lot about what we truly know about our standard picture of how the Universe works.

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Dark Matter

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Dark Matter

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Dark Matter

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Dark Matter

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Dark Matter

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In the field of particle and astrophysics, one of the major unresolved problems is to understand the nature and properties of dark matter, which constitutes almost 80% of the matter content of the universe. This book gives a pedagogical introduction to the field of dark matter in general, and in particular to the model building perspective. Starting from the evidence and need for dark matter, it goes into the deeper understanding of how to accommodate a dark matter candidate in a particle physics model. This book focuses on teaching the basic tools for model building of dark matter, starting from the easiest to gradually the difficult one. Although there are plenty of dark matter models available in the literature, this book concentrates on the important ones. This book aims to motivate the reader to propose a new dark matter model complying with all observational constraints.

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TURNABOUT IS FAIR PLAY… .Marriage and babies weren't what Andrea Cunningham wanted – but Brandon Hamilton was. The gregarious hotel owner had a head for business, a body for loving… and a heart as warm and welcoming as his strong embrace. Like Andrea, he knew two weeks was too little time to understand what was happening between them.But unlike Andrea, he was starting to want all the things she resisted. Andrea had thought these stolen weeks with Brandon would make for beautiful memories. But somehow her heart and soul had been tamed by the tall, dark bachelor for whom memories were not enough… .Best buddies find their bachelor days numbered in bestselling author Joan Elliot Pickart's engaging new series The Bachelor Bet

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Клей для ресниц тёмный Andrea Mod Strip Lash Adhesive Dark великолепно фиксирует накладные ленты, обеспечивая надежность и безопасность. Состав клея для ресниц максимально адаптирован для длительного нахождения у их основания. При этом исключается вероятность дискомфорта и возникновения неблагоприятных последствий в области глаз. Темная консистенция продукта Mod Strip Lash Adhesive Dark не заметна на поверхности волосков. Формула клея имеет особенность в виде водоотталкивающего эффекта, благодаря чему искусственные ресницы будут украшать ваши глаза весьма долгий период времени.

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