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
P. Ko, Takaaki Nomura, Hiroshi Okada
Summary: We investigated a model of dark sector based on non-Abelian SU(2)(D) gauge symmetry, where the dark gauge symmetry is broken into discrete Z(2) and an SU(2)(D) doublet Dirac fermion becomes Z(2)-odd particles, leading to the stable dark matter candidate. The model's unique signatures at the LHC include dark scalar production followed by decays into dark matter and heavy dark fermion pairs, or pairs of X-i bosons decaying into dark matter pairs or SM fermions.
Article
Astronomy & Astrophysics
Federico Compagnin, Stefano Profumo, Nicolao Fornengo
Summary: This article investigates the cosmology and phenomenology of a dark photon portal with a simple dark sector composed of a single, light, fermionic dark matter particle species with mass in the MeV range. Three possible kinetic mixing structures between a new Abelian gauge group U(1)dark and the visible sector are considered: U(1)e.m., U(1)Y, and T[SU(2)L]. The author assumes the dark photon to have a massive and MeV-scale mass, close to the mass scale of the dark matter candidate. The article calculates the dark matter relic density through freeze-out and freeze-in, taking into account the possibility of a late inflationary period that could dilute the dark matter yield of heavy candidates and additional production modes for models with under-abundant thermal production. The parameter space compatible with various experimental and astrophysical constraints is explored, and prospects for discovery using new CMB probes and MeV gamma-ray telescopes are discussed.
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
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
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
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
Thomas G. Rizzo
Summary: The KM portal is a popular mechanism for achieving the observed relic density of light dark matter. This paper explores a model that generates the parameter epsilon through non-Abelian KM, and examines the possible signatures of this model at the LHC and elsewhere.
Article
Astronomy & Astrophysics
R. Alfaro, C. Alvarez, J. C. Arteaga-Velazquez, D. Avila Rojas, H. A. Ayala Solares, R. Babu, E. Belmont-Moreno, K. S. Caballero-Mora, T. Capistran, A. Carraminana, S. Casanova, O. Chaparro-Amaro, U. Cotti, J. Cotzomi, E. De la Fuente, R. Diaz Hernandez, B. L. Dingus, M. A. DuVernois, M. Durocher, J. C. Diaz-Velez, C. Espinoza, K. L. Fan, N. Fraija, J. A. Garcia-Gonzalez, F. Garfias, M. M. Gonzalez, J. P. Harding, S. Hernandez-Cadena, D. Huang, F. Hueyotl-Zahuantitla, A. Iriarte, V. Joshi, S. Kaufmann, D. Kieda, J. Lee, H. Leon Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, K. Malone, O. Martinez, J. Martinez-Castro, J. A. Matthews, E. Moreno, M. Mostafa, A. Nayerhoda, L. Nellen, N. Omodei, Y. Perez Araujo, E. G. Perez-Perez, C. D. Rho, D. Rosa-Gonzalez, H. Salazar, D. Salazar-Gallegos, A. Sandoval, J. Serna-Franco, Y. Son, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Urena-Mena, L. Villasenor, X. Wang, E. Willox, H. Zhou, C. de Leon, V. Gammaldi, E. Karukes, P. Salucci
Summary: We present the results of dark matter (DM) searches in 31 dwarf irregular (dIrr) galaxies within the field of view of the HAWC Observatory. Although no statistically significant DM signal is observed in these galaxies, we provide exclusion limits for WIMP candidates with masses between 1 and 100 TeV. The exclusion limits from dIrr galaxies are comparable to those from classical dSph galaxies and weaker than ultrafaint dSph limits by about two orders of magnitude.
ASTROPHYSICAL JOURNAL
(2023)
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
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
Physics, Particles & Fields
Thomas G. Rizzo, George N. Wojcik
Summary: Toy models for the 5-D analog of the kinetic mixing/vector portal scenario were investigated, with dark matter and the dark Higgs now both localized to the 'dark' brane while only the dark photon remains a 5-D field. The phenomenology of this setup was explored and compared to previous, more complex models in both flat and warped extra dimensions.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Timothy Hapitas, Douglas Tuckler, Yue Zhang
Summary: The gauged U(1)L mu-L Tau extension of the Standard Model is proposed as a simple framework to address the tension in muon anomalous magnetic dipole moment. Neutrino constraints on the (g - 2)mu target and the impact of kinetic mixing between the Z' gauge boson and the photon are explored. The study also investigates the effect of kinetic mixing on L mu - L Tau charged dark matter. Joint efforts of neutrino and dark matter experiments, along with precision spectral measurements, are crucial for testing this theory.
Article
Astronomy & Astrophysics
Arya Farahi, Daisuke Nagai, Dhayaa Anbajagane
Summary: In this work, the coupling between dark matter, hot gas, and stellar mass is studied using cosmological simulations. The researchers find that the strength of this coupling depends on the scale at which halo profiles are measured. They also observe a radius-dependent additive bias when halos are selected based on properties other than their mass, which has implications for cluster abundance and cross-correlation cosmology.
ASTROPHYSICAL JOURNAL
(2022)
Article
Multidisciplinary Sciences
Yun-Feng Liang
Summary: This study used DAMPE data to search for gamma-ray line structures and calculated constraints on DM parameters. The results demonstrate the potential of high-energy-resolution observations in dark matter detection.
Article
Astronomy & Astrophysics
Dhong Yeon Cheong, Hyun Min Lee, Seong Chan Park
Article
Astronomy & Astrophysics
Dhong Yeon Cheong, Sung Mook Lee, Seong Chan Park
Summary: Research shows that primordial black holes can be produced in a minimal UV extension of Higgs inflation with an included R-2 term. Parameters consistent with Standard Model measurements and Planck observation results indicate that M-PBH falls within the range of (10^(-16), 10^(-15))M⊙, with significant abundance, potentially making up the majority of dark matter.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Yongsoo Jho, Jong-Chul Park, Seong Chan Park, Po-Yan Tseng
Review
Physics, Multidisciplinary
Dhong Yeon Cheong, Sung Mook Lee, Seong Chan Park
Summary: This review focuses on recent progress in Higgs inflation, particularly Higgs-R-2 inflation, primordial black hole production, and the R-3 term.
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2021)
Article
Physics, Particles & Fields
Sung Mook Lee, Kin-ya Oda, Seong Chan Park
Summary: In this study, a scenario of spontaneous leptogenesis in Higgs inflation is proposed, with the assistance of two additional operators. These operators contribute to the generation of lepton asymmetry which eventually leads to baryon asymmetry in the universe, all during the rapidly changing Higgs field period. This scenario is compatible with the high reheating temperature of the Higgs inflation model.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Dhong Yeon Cheong, Sung Mook Lee, Seong Chan Park
Summary: We study the reheating of inflationary models with general non-minimal coupling and provide general analytic expressions for cosmological observables. By considering a wide range of nonminimal coupling and different formalisms, we derive predictions for cosmological observables and the reheating temperature with respect to a general equation of state parameter.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
I. H. Park, K-Y Choi, J. Hwang, S. Jung, D. H. Kim, M. H. Kim, C-H Lee, K. H. Lee, S. H. Oh, M-G Park, S. C. Park, A. Pozanenko, C. D. Rho, N. Vedenkin, E. Won
Summary: The proposed method detects gravitational waves using spatial coherence interferometry with stellar light, in contrast to conventional temporal coherence interferometry with laser sources. By measuring two coherent beams of light from a single distant star at separate space-based detectors, this experiment allows for searching gravitational waves in the lower frequency range of 10(-6) to 10(-4) Hz. The detection sensitivity of the proposed stellar interferometer, taking into account detector response and noises, is presented along with the capability of searching for primordial black holes and studying the size of target neutron stars.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Particles & Fields
Bhaskar Dutta, Doojin Kim, Shu Liao, Jong-Chul Park, Seodong Shin, Louis E. Strigari, Adrian Thompson
Summary: The paper investigates a dark matter search strategy using timing and energy spectra to discriminate dark matter signals from neutrino signals at low-energy, pulsed-beam neutrino experiments. The strategy is applied to COHERENT, JSNS(2), and CCM experiments, which are sources of both neutrinos and photons. The results demonstrate that by employing a combination of energy and timing cuts, the search strategy can observe a mild excess of dark matter signals beyond known backgrounds in certain experiments.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Sung Mook Lee, Dhong Yeon Cheong, Sang Chul Hyun, Seong Chan Park, Min-Seok Seo
Summary: The recently suggested Festina-Lente (FL) bound provides a lower bound on the masses of U(1) charged particles in terms of the positive vacuum energy. The FL bound serves as a test for the consistent Higgs potential in the current dark energy-dominated universe and during inflation. The study reveals the implications of the FL bound on the UV behavior of the Higgs potential for a miniscule vacuum energy in the current universe.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Dhong Yeon Cheong, Kazunori Kohri, Seong Chan Park
Summary: This paper introduces the effects of the running of the Higgs self coupling on early universe cosmology, particularly the phenomena of primordial black holes and stochastic gravitational waves. These phenomena can be further studied using proposed gravitational wave observatories.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Multidisciplinary
Kayoung Ban, Yongsoo Jho, Youngjoon Kwon, Seong Chan Park, Seokhee Park, Po-Yan Tseng
Summary: Recently observed anomalies in B meson decays and muon's anomalous magnetic moment have led to the consideration of an extension of the standard model incorporating new interactions in both the lepton and quark sectors simultaneously. Our study focuses on the minimal choice of introducing the vector leptoquark (U-1) and comprehensively investigates all related observables, including (g-2)(mu), R-K(*), R-D(*), B -> (K)ll ', where ll ' represents various combinations of muon and tau, and also lepton flavor violation in tau decays. We find that incorporating an additional U(1)(B3-L2) gauge boson in a hybrid scenario can provide a unified explanation for all these anomalies.
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
(2023)
Article
Astronomy & Astrophysics
Sang Chul Hyun, Jinsu Kim, Seong Chan Park, Tomo Takahashi
Summary: The recent experimental results do not rule out the chaotic inflation model with a power-law potential when assisted by a non-minimally coupled scalar field.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Yongsoo Jho, Seong Chan Park
Summary: Research focuses on discovering and analyzing processes involving large number of particles in the Standard Model and low scale gravity scenario, which can be distinctly observed in collisions in the atmosphere of Earth, particularly in ultra-high-energy neutrino interactions.
Article
Physics, Particles & Fields
Albert De Roeck, Doojin Kim, Zahra Gh. Moghaddam, Jong-Chul Park, Seodong Shin, Leigh H. Whitehead
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Astronomy & Astrophysics
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
Article
Astronomy & Astrophysics
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
Article
Astronomy & Astrophysics
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
Article
Astronomy & Astrophysics
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
