Download or read book Strong Constraints on Self interacting Dark Matter with Light Mediators written by Torsten Bringmann and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Constraints on Light Mediators Confronting Dark Matter Searches with B Physics written by Kai Schmidt-Hoberg and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Constraints on Strongly Interacting Dark Matter written by Christopher V. Cappiello and published by . This book was released on 2021 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dark matter makes up the vast majority of the matter in the universe, but despite years of experimental searches, its particle nature remains unknown. Strong limits on dark matter's properties come from direct detection experiments, which search for scattering between dark matter and Standard Model particles in the lab. While direct detection experiments have set strong and wide-reaching limits on weakly interacting dark matter above the MeV--GeV mass range, these limits lose strength or become invalid in particular regions of dark matter parameter space. If dark matter is too light, it cannot carry enough momentum to trigger typical direct detection experiments at typical halo velocities. We show that if sub-GeV dark matter has a nonzero cross section with nuclei or electrons, it must scatter with cosmic rays, producing two effects: distortions to the observed cosmic ray spectra, and a flux of high-energy, upscattered dark matter. We examine both of these effects and use them to set constraints on sub-GeV dark matter. And if dark matter interacts too strongly, commonly made assumptions about the size of dark matter-nucleus cross sections break down, invalidating many past analyses. For dark matter above a GeV, we show that if the dark matter-nucleon cross section is too large, the Born Approximation fails. This invalidates assumptions that are commonly used to relate dark matter's cross sections with different nuclei, for example, in the context of studying attenuation of strongly interacting dark matter in the Earth's crust. Finally, we build on this by setting new experimental constraints on heavy, composite dark matter, one general class of model that does not rely on the Born Approximation, unlike most studies of pointlike dark matter.
Download or read book A Taste of Dark Matter written by and published by . This book was released on 2015 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dark matter interacting via the exchange of a light pseudoscalar can induce observable signals in indirect detection experiments and experience large self-interactions while evading the strong bounds from direct dark matter searches. The pseudoscalar mediator will however induce flavour-changing interactions in the Standard Model, providing a promising alternative way to test these models. We investigate in detail the constraints arising from rare meson decays and fixed target experiments for different coupling structures between the pseudoscalar and Standard Model fermions. The resulting bounds are highly complementary to the information inferred from the dark matter relic density and the constraints from primordial nucleosynthesis. We discuss the implications of our findings for the dark matter self-interaction cross section and the prospects of probing dark matter coupled to a light pseudoscalar with direct or indirect detection experiments. In particular, we find that a pseudoscalar mediator can only explain the Galactic Centre excess if its mass is above that of the B mesons, and that it is impossible to obtain a sufficiently large direct detection cross section to account for the DAMA modulation.
Download or read book Particle Dark Matter written by Gianfranco Bertone and published by Cambridge University Press. This book was released on 2010-01-07 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the dark matter problem in particle physics, astrophysics and cosmology for graduate students and researchers.
Download or read book Beyond the Standard Model Cocktail written by Yann Gouttenoire and published by Springer Nature. This book was released on 2023-01-01 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a remarkable and complete survey of important questions at the interface between theoretical particle physics and cosmology. After discussing the theoretical and experimental physics revolution that led to the rise of the Standard Model in the past century, the author reviews all the major open puzzles, among them the hierarchy problem, the small value of the cosmological constant, the matter-antimatter asymmetry, and the dark matter enigma, including the state-of-the-art regarding proposed solutions. Also addressed are the rapidly expanding fields of thermal dark matter, cosmological first-order phase transitions and gravitational-wave signatures. In addition, the book presents the original and interdisciplinary PhD research work of the author relating to Weakly-Interacting-Massive-Particles around the TeV scale, which are among the most studied dark matter candidates. Motivated by the absence of experimental evidence for such particles, this thesis explores the possibility that dark matter is much heavier than what is conventionally assumed.
Download or read book Essentials on Dark Matter written by Abraao Jesse Capistrano and published by BoD – Books on Demand. This book was released on 2018-09-12 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: The modern roots on the dark matter problem were basically launched in the 30s, with Zwicky's observations on a notorious discrepancy of mass in coma cluster that presented 500 times the mass than expected using the Newtonian theory (Virial theorem). Curiously, almost 90 years have passed, and the dark matter problem persists and is one of the most common challenges in both observational and theoretical physics. The Dark Matter is a rapid communication on the status-quo of the dark matter phenomenology as well as a presentation of new discussions on the theme.
Download or read book Dark Matter Self interactions from a General Spin 0 Mediator written by Felix Kahlhoefer and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contraints on Light Mediators written by Kai Schmidt-Hoberg and published by . This book was released on 2013 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Early Universe written by Edward Kolb and published by CRC Press. This book was released on 2018-03-08 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Early Universe has become the standard reference on forefront topics in cosmology, particularly to the early history of the Universe. Subjects covered include primordial nubleosynthesis, baryogenesis, phases transitions, inflation, dark matter, and galaxy formation, relics such as axions, neutrinos and monopoles, and speculations about the Universe at the Planck time. The book includes more than ninety figures as well as a five-page update discussing recent developments such as the COBE results.
Download or read book Dark Matter Phenomenology written by Mathias Pierre and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most puzzling problems of modern physics is the identification of the nature a non-relativistic matter component present in the universe, contributing to more than 25% of the total energy budget, known as Dark Matter. Weakly Interacting Massive Particles (WIMPs) are among the best motivated dark matter candidates. However, in light of non conclusive detection signals and strong constraints from collider, direct and indirect detection experiments, this thesis presents constraints on several realizations of the WIMP paradigm in the context of simplified dark matter models. More elaborated models considering extended gauge structures are discussed further on, such as constructions involving generalized Chern-Simons couplings and a specific WIMP scenario motivated by some recently observed flavor anomalies related to the RK(*) observable. The second part of this thesis is devoted to the discussion of an alternative dark matter thermal production mechanism where an explicit realization of the Strongly Interacting Massive Particles (SIMPs) paradigm is discussed in the context of a non-Abelian hidden gauge structure. In a last part, the possibility of producing non-thermally a dark matter component via the "freeze-in" mechanism was investigated and the strong impact of the postinationary reaheating stage of the universe on such constructions illustrated by the specific case where dark matter density production is mediated by a heavy spin-2 field in addition to the standard graviton.
Download or read book Self interacting Dark Matter in Cosmological Simulations written by Alexander Bastidas Fry and published by . This book was released on 2015 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-Interacting Dark Matter is a cosmologically consistent alternative theory to Cold Dark Matter that solves problems of the Cold Dark Matter model on small scales. Our N-body simulations demonstrate that Self-Interacting Dark Matter creates constant density cores that are consistent with observations of Local Group dwarf galaxies. However, the apparent problems of Cold Dark Matter have natural astrophysical contributions from baryonic supernovae feedback. The evidence for Self-Interacting Dark Matter taken together with the evidence for the need for better feedback models presents a challenging environment in which to place constraints on either. We use high resolution cosmological simulations to compare the detailed properties of galaxies at a range of masses with a focus on dwarf galaxies which are the most dark matter dominated galaxies in the universe. We conclude that it is possible that velocity dependent Self-Interacting Dark Matter could explain the common mass scale of dark matter on small scales, the too big to fail problem, and the core versus cusp problem even in the absence of strong stellar feedback; however, baryonic processes offer solutions to these same problems. We find that once baryon physics and outflows are introduced, cores are created in both Self-Interacting Dark Matter and Cold Dark Matter cosmologies.
Download or read book Two Models of Self interacting Dark Matter written by Sarah Smolenski and published by . This book was released on 2019 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: I explore two possible extensions to the standard model. The first is a simple addition, including only one additional scalar particle with an exact U(1)$ symmetry, which allows the dark boson to condense even when relativistic. The second model includes five new fields consisting of: two dark matter candidates; a mediator boson; heavy dark neutrinos; and a heavy scalar.
Download or read book Neutrino Cosmology written by Julien Lesgourgues and published by Cambridge University Press. This book was released on 2013-02-21 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: A self-contained guide to the role played by neutrinos in the Universe and how their properties influence cosmological and astrophysical observations.
Download or read book Scattering Theory written by John R. Taylor and published by Courier Corporation. This book was released on 2012-05-23 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: This graduate-level text, intended for any student of physics who requires a thorough grounding in the quantum theory of nonrelativistic scattering, emphasizes the time-dependent approach. 1983 edition.
Download or read book Using the Dark to See written by Ranjan Laha and published by . This book was released on 2014 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss two important research avenues in astroparticle physics: dark matter and neutrinos. We discuss both direct and indirect detection of dark matter. We calculate the signatures of dark matter annihilation from galaxy clusters in neutri- nos. We show the constraints on dark matter annihilation from radio measurements near the Galactic Center. We consider the dark matter annihilation contribution to the isotropic diffuse gamma-ray background and show how to determine the mini- mum dark matter halo mass for a given dark matter mass and annihilation channel. Motivated by recent hints on dark matter self-interactions, we calculate the nuclear recoil spectrum from a bound state dark matter scattering with a nuclei at rest in a dark matter direct detection experiment. We discuss non-standard interactions of neutrinos and astrophysical neutrino detection in the second part of the thesis. We derive strong constraints on a light Abelian gauge boson coupling to Standard Model leptons. In light of the recent detection of high energy neutrinos in IceCube, we discuss the cascade detection of high energy astrophysical neutrinos in IceCube and point out the benefits of this detection channel. We propose a new method to detect supernova electron neutrino in gadolinium loaded Super-Kamiokande detector and show that it can be used to measure the supernova electron neutrino spectrum to ~ 20% accuracy.
Download or read book Production Mechanisms and Self interactions of Vector Dark Matter written by Mateusz Duch and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dotyczy: self-interacting dark matter, multicomponent dark matter, stable mediator, pinch technique, Breit-Wigner resonance, resonant annihilation, freeze-in, freeze-out, production mechanism, self-interaction, dark matter, samooddziałująca ciemna materia, wielokomponentowa ciemna materia, stabilny mediator, pinch technique, rezonans Breita-Wignera, rezonansowa anihilacja, freeze-in, freeze-out, mechanizm produkcji, samooddziaływanie, ciemna materia.
