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Dark matter (DM) halos have long been known to be triaxial, but in studies of possible annihilation and decay signals they are often treated as approximately spherical. In this work, we examine the asymmetry of potential indirect detection…

Cosmology and Nongalactic Astrophysics · Physics 2016-12-28 Nicolás Bernal , Lina Necib , Tracy R. Slatyer

Countless low-surface brightness objects - including spiral galaxies, dwarf galaxies, and noise patterns - have been detected in recent large surveys. Classically, astronomers visually inspect those detections to distinguish between real…

Astrophysics of Galaxies · Physics 2021-03-25 Oliver Müller , Eva Schnider

This White Paper is an input to the ongoing discussion about the extension and refinement of simplified Dark Matter (DM) models. Based on two concrete examples, we show how existing simplified DM models (SDMM) can be extended to provide a…

Dwarf spheroidal galaxies (dSphs) are promising targets for the indirect detection of dark matter through gamma-ray emission due to their proximity, lack of astrophysical backgrounds and high dark matter density. They are often used to…

High Energy Physics - Phenomenology · Physics 2016-06-01 Matthew G. Baring , Tathagata Ghosh , Farinaldo S. Queiroz , Kuver Sinha

We describe and test a novel Dark Matter Annihilation Feedback (DMAF) scheme that has been implemented into the well known cosmological simulation code \textsf{GADGET-2}. In the models considered here, dark matter can undergo…

Cosmology and Nongalactic Astrophysics · Physics 2017-09-20 Nikolas Iwanus , Pascal. J. Elahi , Geraint. F. Lewis

Utilizing data from the ELVIS and Via Lactea-II simulations, we characterize the local dark matter subhalo population, and use this information to refine the predictions for the gamma-ray fluxes arising from annihilating dark matter in this…

High Energy Astrophysical Phenomena · Physics 2017-04-19 Dan Hooper , Samuel J. Witte

Galaxy clusters are promising targets for indirect dark matter searches. Gamma-ray signatures from the decay or annihilation of dark matter particles inside these clusters could be observable with the Fermi Large Area Telescope (LAT). Based…

High Energy Physics - Phenomenology · Physics 2015-05-30 Xiaoyuan Huang , Gilles Vertongen , Christoph Weniger

Dark matter (DM) direct detection experiments aim to place constraints on the DM--nucleon scattering cross-section and the DM particle mass. These constraints depend sensitively on the assumed local DM density and velocity distribution…

Cosmology and Nongalactic Astrophysics · Physics 2020-11-25 Robert Poole-McKenzie , Andreea S. Font , Billy Boxer , Ian G. McCarthy , Sergey Burdin , Sam G. Stafford , Shaun T. Brown

The dark matter halo of the Milky Way is predicted to contain a very large number of smaller subhalos. As a result of the dark matter annihilations taking place within such objects, the most nearby and massive subhalos could appear as…

High Energy Physics - Phenomenology · Physics 2014-01-22 Asher Berlin , Dan Hooper

Searching for gamma rays from dwarf spheroidal galaxies (dSphs) is a promising approach to detect dark matter (DM) due to the high DM densities and low baryon components in dSphs. The Fermi-LAT observations from dSphs have set stringent…

High Energy Astrophysical Phenomena · Physics 2018-04-04 Yi Zhao , Xiao-Jun Bi , Peng-Fei Yin , Xinmin Zhang

This study reanalyzes the detection prospects of dark matter (DM) annihilation signals in the Galactic Center, focusing on velocity-dependent dynamics within a spike density near the supermassive black hole (Sgr~A$^{\star}$). We investigate…

High Energy Physics - Phenomenology · Physics 2024-10-25 MeiWen Yang , Zhi-Qi Guo , Xiao-Yi Luo , Zhao-Qiang Shen , Zi-Qing Xia , Chih-Ting Lu , Yue-Lin Sming Tsai , Yi-Zhong Fan

Indirect searches for dark matter through Standard Model products of its annihilation generally assume a cross-section which is dominated by a term independent of velocity ($s$-wave annihilation). However, in many DM models an $s$-wave…

High Energy Astrophysical Phenomena · Physics 2019-05-29 Christian Johnson , Regina Caputo , Chris Karwin , Simona Murgia , Steve Ritz , Jessie Shelton

Low energy antideuteron detection presents a unique channel for indirect detection, targeting dark matter that annihilates into hadrons in a relatively background-free way. Since the idea was first proposed, many WIMP-type models have…

High Energy Physics - Phenomenology · Physics 2020-05-26 Lisa Randall , Weishuang Linda Xu

Dynamical dark matter (DDM) is an alternative framework for dark-matter physics in which the dark-matter candidate is an ensemble of constituent fields with differing masses, lifetimes, and cosmological abundances. In this framework, it is…

High Energy Physics - Phenomenology · Physics 2013-05-30 Keith R. Dienes , Jason Kumar , Brooks Thomas

Ultralight dark matter (ULDM), as a class of low mass (< 1 eV) dark matter (DM) candidates, is a compelling alternative to historically dominant models such as WIMPs and has recently gained significant attention in the scientific community.…

High Energy Physics - Phenomenology · Physics 2024-11-22 Jordan Gué

We reexamine the simplified dark matter (DM) models with fermionic DM particle and spin-0 mediator. The DM-nucleon scattering cross sections of these models are low-momentum suppressed at tree-level, but receive sizable loop-induced…

High Energy Physics - Phenomenology · Physics 2020-01-08 Tong Li , Peiwen Wu

Indirect detection of dark matter particles, i.e. the detection of annihilation or decay products of Weakly Interacting Massive Particles, has entered a pivotal phase as experiments reach sensitivities that probe the most interesting…

High Energy Physics - Phenomenology · Physics 2014-11-10 Jan Conrad

Dark matter (DM) is largely believed to be the dominant component of the matter content of the Universe. Astronomical measurements can be utilized to search for Standard Model (SM) annihilation or decay products of DM, complementing direct…

High Energy Astrophysical Phenomena · Physics 2021-08-16 Chiara Giuri

We present a comprehensive framework for interpreting electron recoil signals induced by fast-moving dark matter (DM), applicable across a wide range of theoretically motivated models. Amid both null results in conventional weakly…

High Energy Physics - Phenomenology · Physics 2025-11-07 Haider Alhazmi , Doojin Kim , Kyoungchul Kong , Aishah Sumayli