Article
Astronomy & Astrophysics
Bastian Diaz Saez, Karim Ghorbani
Summary: We explore a class of simplified extensions to the Standard Model, which includes a complex singlet scalar and a vector-like lepton as a mediator, both charged under a new Z3 symmetry. The model, in its simplest form, couples only to right-handed electrons and can accommodate the correct dark matter relic abundance while evading strong constraints from perturbativity, collider, and dark matter searches. Additionally, the model can naturally enhance positron fluxes by several orders of magnitude, leading to a box-shaped spectra. The quantum charge assignments of the new fields offer various phenomenological possibilities.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Andrea Caputo, Michela Negro, Marco Regis, Marco Taoso
Summary: We study the potential of the NASA MeV mission COSI (Compton Spectrometer and Imager) in the search for dark matter. Our results show that COSI offers a great opportunity to directly detect dark matter in the form of monochromatic gamma-rays from decays or annihilations. We also demonstrate that COSI can contribute to the search for primordial black holes (PBHs) dark matter and improve current bounds on sub-GeV dark matter annihilation/decay and PBH evaporation.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Adam Coogan, Logan Morrison, Stefano Profumo
Summary: This work analyzes the dark matter self-annihilation cross sections into final states containing mesons and the Standard Model dynamical degrees of freedom, and explores the discovery reach of future gamma-ray telescopes.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Adam Coogan, Logan Morrison, Tilman Plehn, Stefano Profumo, Peter Reimitz
Summary: We present a new open-source package, Hazma 2, for computing accurate spectra relevant for indirect dark matter searches. The package calculates photon, neutrino, and positron production, provides example results and observational constraints, and compares with other existing codes.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Jaume Zuriaga-Puig, Viviana Gammaldi, Daniele Gaggero, Thomas Lacroix, M. A. Sanchez-Conde
Summary: This paper presents a comprehensive study of the gamma-ray flux observed in the Galactic Center using the H.E.S.S. telescope. The aim of the study is to constrain the distribution of dark matter in the region and investigate the possibility of a density enhancement near the supermassive black hole Sgr A*. The results support the hypothesis of an enhanced dark matter density in the Galactic Center and provide guidance for future studies using current and next-generation telescopes.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Multidisciplinary
Sulagna Bhattacharya, Basudeb Dasgupta, Ranjan Laha, Anupam Ray
Summary: This study shows that the nondetection of gravitational waves from low-mass black hole mergers can place constraints on the interactions between nonannihilating dark matter particles and nucleons. With LIGO data, benchmark constraints for different types of dark matter have been determined, which will help detect particle dark matter and test its ability to explain the absence of pulsars in the Galactic center.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Rakhi Mahbubani, Michele Redi, Andrea Tesi
Summary: The study investigates dark matter bound-state formation and its implications for indirect detection experiments, providing generic formulas for the formation of shallow nuclear bound states on emission of photons, W and Z gauge bosons. It finds that the short-distance nuclear potential often violates factorization, and the bound-state formation of a (weakly-coupled) Minimal DM quintuplet gives rise to indirect-detection signals compatible with current bounds.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Jack Runburg, Eric J. Baxter, Jason Kumar
Summary: In the cold dark matter scenario, the gamma-ray probability distribution function (PDF) can provide information about the velocity dependence of the dark matter annihilation. Current and future observations can be used to constrain the microphysics of dark matter annihilation by performing mock data analysis. Additionally, a four-parameter degeneracy between the velocity dependence, minimum subhalo mass, power law index of the subhalo mass function, and normalization of the dark matter signal is pointed out, which can be resolved with priors from N-body simulations or observational constraints.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Javier Reynoso-Cordova, Oleg Burgueno, Alex Geringer-Sameth, Alma X. Gonzalez-Morales, Stefano Profumo, O. Valenzuela
Summary: The observed gamma-ray emission associated with omega-Centauri can be explained by two possible scenarios: emission from millisecond pulsars (MSP) and dark matter (DM) annihilation. By studying the total number of MSPs in the globular cluster and constraining the DM particle mass, upper limits on omega-Centauri's dark matter content were translated into lower limits on the annihilation cross section, taking into account the spatial extension of the DM halo. Further analysis of omega-Centauri's internal kinematics and the resident MSP population will provide stronger constraints and shed light on the mysterious origin of the gamma-ray source.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Arman Esmaili, P. D. Serpico
Summary: By analyzing the Tibet AS(gamma) data in the sub-PeV energy region, important implications for decaying dark matter candidates can be derived. The results suggest that significantly better sensitivity can be achieved by using the arrival distribution of photons than by existing methods.
Article
Astronomy & Astrophysics
Thomas Lacroix, Gaetan Facchinetti, Judit Perez-Romero, Martin Stref, Julien Lavalle, David Maurin, Miguel A. Sanchez-Conde
Summary: This study presents the first systematic exploration of velocity-dependent dark matter annihilation in various astrophysical objects, highlighting the significant impact of velocity dependence on dark matter halo substructure and signal angular extension.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Debajit Bose, Tarak Nath Maity, Tirtha Sankar Ray
Summary: By measuring the solar gamma ray flux, we have set stronger limits on the scattering cross section between dark matter and electrons, with these limits ranging from GeV to PeV scale for dark matter masses, which are four to six orders of magnitude stronger than existing limits.
Article
Astronomy & Astrophysics
S. Arcari, E. Pinetti, N. Fornengo
Summary: This paper introduces a method of using the cross-correlation technique to search for dark matter signals by observing information in cosmic voids. It is found that the signal-to-background ratio for decaying dark matter versus astrophysical sources is significantly higher in voids compared to halos, making it easier to detect pure dark matter signals.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Multidisciplinary
Antonio Ambrosone, Marco Chianese, Damiano F. G. Fiorillo, Antonio Marinelli, Gennaro Miele
Summary: Starburst galaxies are potential sources of high-energy gamma rays, and their cosmic-ray spectrum distortion can be indirectly observed. Current data provide tight bounds on the cross section between protons and dark matter, while future measurements are expected to significantly improve these limits.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Pooja Bhattacharjee, Debajyoti Choudhury, Kasinath Das, Dilip Kumar Ghosh, Pratik Majumdar
Summary: This paper examines 14 recently discovered ultra-faint dwarf galaxies (UFDs) and studies the electromagnetic radiation emitted from them across a wide range of frequencies. Upper limits on annihilation cross section in a model independent way are obtained through analysis of Fermi-LAT data on high energy gamma rays and radio fluxes at the GMRT and VLA. The sensitivity of the Square Kilometer Array radio telescope in probing synchrotron radiation from the UFDs is discussed, as well as the dependence of the upper limits on uncertainties in determining various astrophysical parameters.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Miguel Escudero, Olga Mena, Aaron C. Vincent, Ryan J. Wilkinson, Celine Boehm
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2015)
Article
Astronomy & Astrophysics
Aaron C. Vincent, Enrique Fernandez Martinez, Pilar Hernandez, Olga Mena, Massimiliano Lattanzi
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2015)
Article
Astronomy & Astrophysics
Aaron C. Vincent, Aldo Serenelli, Pat Scott
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2015)
Article
Astronomy & Astrophysics
Sergio Palomares-Ruiz, Aaron C. Vincent, Olga Mena
Article
Physics, Multidisciplinary
Aaron C. Vincent, Pat Scott, Aldo Serenelli
PHYSICAL REVIEW LETTERS
(2015)
Article
Astronomy & Astrophysics
Thomas Siegert, Roland Diehl, Aaron C. Vincent, Fabrizia Guglielmetti, Martin G. H. Krause, Celine Boehm
ASTRONOMY & ASTROPHYSICS
(2016)
Article
Astronomy & Astrophysics
Aaron C. Vincent, Pat Scott, Aldo Serenelli
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2016)
Article
Astronomy & Astrophysics
Laura Lopez-Honorez, Olga Mena, Angeles Moline, Sergio Palomares-Ruiz, Aaron C. Vincent
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2016)
Article
Physics, Particles & Fields
David G. Cerdeno, Malcolm Fairbairn, Thomas Jubb, Pedro A. N. Machado, Aaron C. Vincent, Celine Boehm
JOURNAL OF HIGH ENERGY PHYSICS
(2016)
Article
Astronomy & Astrophysics
Thomas Siegert, Roland Diehl, Aaron C. Vincent, Fabrizia Guglielmetti, Martin G. H. Krause, Celine Boehm
ASTRONOMY & ASTROPHYSICS
(2016)
Article
Astronomy & Astrophysics
Ben Geytenbeek, Soumya Rao, Pat Scott, Aldo Serenelli, Aaron C. Vincent, Martin White, Anthony G. Williams
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2017)
Proceedings Paper
Physics, Particles & Fields
Sergio Palomares-Ruiz, Olga Mena, Aaron C. Vincent
NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS
(2016)
Article
Astronomy & Astrophysics
Ryan J. Wilkinson, Aaron C. Vincent, Celine Boehm, Christopher McCabe
Article
Astronomy & Astrophysics
Aaron C. Vincent, Sergio Palomares-Ruiz, Olga Mena
Article
Astronomy & Astrophysics
G. Johannesson, R. Ruiz de Austri, A. C. Vincent, I. V. Moskalenko, E. Orlando, T. A. Porter, A. W. Strong, R. Trotta, F. Feroz, P. Graff, M. P. Hobson
ASTROPHYSICAL JOURNAL
(2016)