Article
Astronomy & Astrophysics
Amir Amiri, Bastian Diaz Saez, Karim Ghorbani
Summary: In this research, we investigate the U(1)X gauge boson as a potential dark matter candidate. The vector dark matter obtains mass through the spontaneous breaking of gauge symmetry by a complex singlet scalar, resulting in the addition of a second Higgs boson to the spectra. The communication between the dark matter candidates and SM particles occurs via a scalar-Higgs portal. We focus on the masses of the vector dark matter and scalar mediator, specifically those below 10 GeV, known as light dark matter. The effects of the second-moment are explored in cases where the vector dark matter annihilates resonantly. We examine two thermal mechanisms, including dark matter annihilation via forbidden channels and near a pole, which alleviate the stringent constraints imposed by CMB bounds on light dark matter. The analysis also takes into account bounds from colliders, thermalization conditions, beam-dump experiments, and astrophysical observations. Overall, considering all the bounds, including upper limits from direct detection, a viable parameter space is achieved.
Article
Astronomy & Astrophysics
Shintaro Eijima, Osamu Seto, Takashi Shimomura
Summary: This study reexamines sterile neutrino dark matter in the gauged U(1)B-L model, improving upon previous research by tracing and evaluating the evolution of number densities. The results demonstrate that the gauge coupling of U(1)B-L for freeze-in sterile neutrinos is smaller than previously reported, avoiding overproduction and remaining consistent with cosmological constraints.
Article
Astronomy & Astrophysics
Purusottam Ghosh, Satyabrata Mahapatra, Nimmala Narendra, Narendra Sahu
Summary: In this study, a gauged U(1)B-L extension of the standard model is investigated to explain the light neutrino masses and dark matter. The neutrino masses are generated through a type-II seesaw mechanism, and the anomaly problem is solved by introducing right chiral fermions with specific B-L charges. The lightest fermion among them becomes a viable candidate for dark matter. In addition to explaining the observed phenomena, the model also predicts new signals at colliders.
Article
Astronomy & Astrophysics
Keiko I. Nagao, Hiroshi Okada
Summary: The proposed model suggests a radiative seesaw mechanism with a light dark matter candidate, where neutrino masses are generated at one-loop level. The model includes a bosonic dark matter candidate with a mass range of 0.01-50 GeV, and utilizes two symmetries to prevent dark matter decays. The naturalness of the tiny dark matter mass is achieved through radiatively induced mass of neutral fermions interacting with the dark matter candidate.
PHYSICS OF THE DARK UNIVERSE
(2022)
Article
Astronomy & Astrophysics
Esau Cervantes, Omar Perez-Figueroa, Ricardo Perez-Martinez, Saul Ramos-Sanchez
Summary: Large classes of nonsupersymmetric string models with standard-model features have been studied, but their phenomenology is not well understood. The spectra of these models exhibit scalar fields that only couple to observed particles through a multi-Higgs sector. On the other hand, bottom-up models with Higgs portals provide a viable framework for dark matter. We explore the realization of Higgs portals in promising heterotic orbifold models without supersymmetry and find interesting constraints on the masses of dark matter candidates and the heavy Higgs sector.
Article
Astronomy & Astrophysics
Keiko Nagao, Hiroshi Okada
Summary: We study neutrinos and dark matter within the framework of a radiative seesaw scenario based on a gauged U(1)(R) symmetry. The dark matter is identified as a bosonic particle that interacts with the quark and lepton sectors through vector-like heavier quarks and leptons, and it also contributes to generating the neutrino mass matrix with neutral heavier fermions. Various constraints on the masses and couplings related to dark matter are explored by considering relic density, scattering cross sections for direct detection methods, neutrino oscillations, lepton flavor violations, and the muon anomalous magnetic moment. Additionally, we discuss semileptonic decays and neutral meson mixings that occur through the dark matter in one-loop box diagrams.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Masato Arai, Nobuchika Okada
Summary: The article discusses how to solve the cosmological problem of a too light gravitino in the NL-MSSM by introducing an odd SM singlet chiral superfield and proposes a method to successfully achieve a Higgs-portal dark matter scenario.
Article
Physics, Nuclear
Daniel A. Camargo, Michael Klasen, Sybrand Zeinstra
Summary: The discovery potential of a heavy scalar resonance in the dilepton channel at the Large Hadron Collider (LHC) with a center-of-mass energy of 13 TeV has been determined. Despite the small coupling of the singlet scalar with the doublets, this heavy scalar can be discovered with 5 sigma at the LHC in the mass range between 500 GeV and 1 TeV. This discovery is achievable with integrated luminosities of around 300 to 1400 fb(-1).
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Seungwon Baek, P. Ko, Wan-Il Park
Summary: In the Higgs portal vector dark matter model, the behavior difference of the invisible Higgs decay width in the massless VDM limit demonstrates a limitation of effective field theory and the importance of gauge-invariant and renormalizable models.
Article
Physics, Particles & Fields
David Curtin, Shayne Gryba
Summary: Many minimal models of dark matter and canonical solutions to the hierarchy problem have been excluded or constrained by LHC and direct detection null results. The study introduces THPDM to generalize HPDM in Twin Higgs models and predicts a direct detection signal orders of magnitude below that of HPDM. Twin radiation contributions are suppressed in many Twin Higgs models, leading to possible signals at next generation experiments.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Debasish Borah, Suruj Jyoti Das, Abhijit Kumar Saha
Summary: By studying the non-supersymmetric minimal gauged B - L extension of the standard model with three right handed neutrinos, we find that thermal dark matter may be overproduced due to insufficient annihilations, while non-thermal dark matter scenario is viable but with a limited connection between the B - L gauge sector and inflationary dynamics. The reheat temperature predicted by the model favors nonthermal leptogenesis with hierarchical right handed neutrinos and is consistent with other requirements.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Cristina Mondino, Maxim Pospelov, Joshua T. Ruderman, Oren Slone
Summary: A new U(1) dark gauge group is coupled to the Standard Model through kinetic mixing, providing a dark matter candidate in the form of the dark Higgs field, which generates the mass of the dark photon. Conditions involving the mass of the dark Higgs, the kinetic mixing parameter, and the dark gauge coupling lead to a sufficiently metastable dark Higgs to serve as dark matter. Both freeze-in and freeze-out processes can result in viable dark Higgs dark matter with a sub-GeV mass and a specific range of kinetic mixing parameter.
Article
Astronomy & Astrophysics
Pablo de la Torre, Miguel Gutierrez, Manuel Masip
Summary: We propose a minimal model of dark matter consisting of a fermion singlet chi coupled to the visible sector through the Higgs portal and a heavy Dirac neutrino N that allows for annihilation chi chi -> N nu. This model explains the observed relic abundance consistent with direct search constraints, and predicts a monochromatic neutrino signal in indirect searches at 10 GeV-1 TeV. The capture rate of chi by the Sun is calculated and shown to potentially exceed the neutrino floor produced by cosmic rays in the solar surface. This model serves as a canonical example of a WIMP that is not excluded by direct searches and can be studied at neutrino telescopes and colliders.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
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
Rishu Verma, B. C. Chauhan
Summary: We introduce a model that can explain the neutrino phenomenology, dark matter and anomalous magnetic moment (g-2) in a unified framework. The model incorporates the inverted seasaw (ISS)(2,3) mechanism, which yields an additional sterile state serving as a viable dark matter candidate. The mass of the right-handed neutrino is obtained at the TeV scale, making it accessible at the LHC. By introducing the anomaly free U(1)Le-L & mu; gauge symmetry, we provide a natural explanation for the anomalous magnetic moment of the electron and muon, with a minimal setup. The MeV scale gauge boson successfully accounts for the anomalous magnetic moment of the electron and muon (g -2)e,& mu; simultaneously, while the predicted neutrino phenomenology and relic abundance of dark matter are consistent with experimental results.
PHYSICS OF THE DARK UNIVERSE
(2023)
