253 citations · 750 across the 31 of their papers we have counts for
33 papers
Sub-MeV gamma-ray lines from an endothermic interpretation of the LZ recoil candidate
Maíra Dutra, Jacinto P. Neto, Clarissa Siqueira
Endothermic upscattering of heavy dark matter offers a compelling interpretation of the high-energy nuclear-recoil candidate recently reported by LUX-ZEPLIN (LZ), with a characteri…
Prospects for dark matter observations in dwarf spheroidal galaxies with the Cherenkov Telescope Array Observatory
K. Abe, S. Abe, J. Abhir +491
The dwarf spheroidal galaxies (dSphs) orbiting the Milky Way are widely regarded as systems supported by velocity dispersion against self-gravity, and as prime targets for the sear…
Constraining light dark matter in vector-scalar portals with COSI and AMEGO-X
Maíra Dutra, Clarissa Siqueira, Tonia M. Venters
Detecting gamma-ray signals that could be due to dark matter (DM) particles would give us invaluable information about the nature of DM. In particular, gamma-ray lines could provid…
Constraints on the Inert Doublet Model of dark matter with very high-energy gamma-ray observatories
Lucca Radicce Justino, Clarissa Siqueira, Aion Viana
We investigate constraints on the Inert Doublet Model (IDM) that features a scalar dark matter candidate, using data from recent and future gamma-ray observatories. The relevance o…
Prospects for the detection of Dark Matter with Long-lived Mediators in the Sun using the Southern Wide-field Gamma-ray Observatory
Micael Andrade, Juan Fagiani, Clarissa Siqueira +2
The operation of the next generation of gamma-ray observatories will lead to a great advance in dark matter searches. In this paper, we use the hidden sectors hypothesis within the…
Dark Matter Line Searches with the Cherenkov Telescope Array
S. Abe, J. Abhir, A. Abhishek +562
Monochromatic gamma-ray signals constitute a potential smoking gun signature for annihilating or decaying dark matter particles that could relatively easily be distinguished from a…
Chasing Gravitational Waves with the Cherenkov Telescope Array
Jarred Gershon Green, Alessandro Carosi, Lara Nava +563
The detection of gravitational waves from a binary neutron star merger by Advanced LIGO and Advanced Virgo (GW170817), along with the discovery of the electromagnetic counterparts…
Interpolation of Instrument Response Functions for the Cherenkov Telescope Array in the Context of pyirf
Rune Michael Dominik, Maximilian Linhoff, Julian Sitarek
The Cherenkov Telescope Array (CTA) will be the next generation ground-based very-high-energy gamma-ray observatory, constituted by tens of Imaging Atmospheric Cherenkov Telescopes…
Variability studies of active galactic nuclei from the long-term monitoring program with the Cherenkov Telescope Array
Guillaume Grolleron, Josefa Becerra González, Jonathan Biteau +13
Blazars are active galactic nuclei (AGN) with a relativistic jet oriented toward the observer. This jet is composed of accelerated particles which can display emission over the ent…
Performance update of an event-type based analysis for the Cherenkov Telescope Array
Juan Bernete, Orel Gueta, Tarek Hassan +3
The Cherenkov Telescope Array (CTA) will be the next-generation observatory in the field of very-high-energy (20 GeV to 300 TeV) gamma-ray astroparticle physics. The traditional ap…
Dark matter searches in dwarf spheroidal galaxies with the Cherenkov Telescope Array
Francesco Gabriele Saturni, Michele Doro, Aldo Morselli +1
Dark matter (DM) is one of the major components in the Universe. However, at present its existence is still only inferred through indirect astronomical observations. DM particles c…
Prospects for -ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array
The Cherenkov Telescope Array Consortium, :, K. Abe +564
Galaxy clusters are expected to be dark matter (DM) reservoirs and storage rooms for the cosmic-ray protons (CRp) that accumulate along the cluster's formation history. Accordingly…
Sensitivity of the Cherenkov Telescope Array to TeV photon emission from the Large Magellanic Cloud
The Cherenkov Telescope Array Consortium
A deep survey of the Large Magellanic Cloud at ~0.1-100TeV photon energies with the Cherenkov Telescope Array is planned. We assess the detection prospects based on a model for the…
Flavor changing interactions confronted with meson mixing and hadron colliders
A. E. Cárcamo Hernández, L. Duarte, A. S. de Jesus +5
We have witnessed some flavor anomalies appeared in the past years, and explanations based on extended gauge sectors are among the most popular solutions. These beyond the Standard…
Roads for Right-handed Neutrino Dark Matter: Fast Expansion, Standard Freeze-out, and Early Matter Domination
Giorgio Arcadi, Jacinto Paulo Neto, Farinaldo S. Queiroz +1
Right-handed neutrinos appear in several extensions beyond the Standard Model, specially in connection to neutrino masses. Motivated by this, we present a model of right-handed neu…
Indirect Searches for Secluded Dark Matter
C. Siqueira, Guilherme N. Fortes, Aion Viana +1
Dark matter is one of the most important open problems in particle physics and cosmology. Weakly interacting massive particles (WIMPs) appear as an appealing solution, providing th…
Rare Kaon Decay to Missing Energy: Implications of the NA62 Result for a Model
Téssio B. de Melo, Sergey Kovalenko, Farinaldo S. Queiroz +2
Meson decays offer a good opportunity to probe new physics. The rare kaon decay is one of the cleanest of them and, for this reason, is rather sensitiv…
Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre
The Cherenkov Telescope Array Consortium, :, A. Acharyya +449
We provide an updated assessment of the power of the Cherenkov Telescope Array (CTA) to search for thermally produced dark matter at the TeV scale, via the associated gamma-ray sig…
Right-handed Neutrino Dark Matter, Neutrino Masses, and non-Standard Cosmology in a 2HDM
G. Arcadi, S. Profumo, F. S. Queiroz +1
We explore the dark matter phenomenology of a weak-scale right-handed neutrino in the context of a Two Higgs Doublet Model. The expected signal at direct detection experiments is d…
Vector-Like Leptons and Inert Scalar Triplet: Lepton Flavor Violation, and Collider Searches
A. S. de Jesus, S. Kovalenko, F. S. Queiroz +2
We investigate simplified models involving an inert scalar triplet and vector-like leptons that can account for the muon anomaly. These simplified scenarios are embedded in a…
Brazilian Community Report on Dark Matter
E. Abdalla, I. F. M. Albuquerque, A. Alves +52
This white paper summarizes the activities of the Brazilian community concerning dark matter physics and highlights the importance of financial support to Brazilian groups that are…
Explaining the AMS positron excess via Right-handed Neutrinos
Farinaldo S. Queiroz, Clarissa Siqueira
We have witnessed in the past decade the observation of a puzzling cosmic-ray excess at energies larger than GeV. The AMS-02 data published this year has new ingredients such…
Has AMS-02 Observed Two-Component Dark Matter?
Stefano Profumo, Farinaldo Queiroz, Clarissa Siqueira
There is convincing observational evidence for an increasing cosmic-ray positron-to-electron ratio at energies larger than ~GeV, at odds with expectations from secondary p…
Secluded Dark Matter in light of the Cherenkov Telescope Array (CTA)
Clarissa Siqueira
Secluded dark matter is one of the most popular dark matter models, where dark matter annihilations go into particles that belong to a dark sector. An interesting way to probe such…