Article
Physics, Particles & Fields
Mario E. Gomez, Qaisar Shafi, Amit Tiwari, Cem Salih Un
Summary: We explore the implications of resolving the muon g - 2 anomaly in a SU(4)(c) x SU(2)(L) x SU(2)(R) model. It is found that resolving the anomaly requires relatively light sleptons, chargino, and LSP neutralino. The model can also accommodate the Higgs boson mass and the vacuum stability of the scalar potential, with predictions of measurable spin-independent scattering cross-section.
EUROPEAN PHYSICAL JOURNAL C
(2022)
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, Particles & Fields
Waqas Ahmed, Muhammad Moosa, Shoaib Munir, Umer Zubair
Summary: In this study, we analyze the shifted hybrid inflation in a no-scale supersymmetric SU(5) GUT model, which effectively avoids the monopole problem. The no-scale framework is derived as the effective field theory of supersymmetric compactifications of string theory, resulting in a flat potential with no anti-de Sitter vacua, resolving the eta problem. The model predicts a scalar spectral tilt (ns) compatible with the latest measurements by the Planck satellite, while also accommodating a large tensor-to-scalar ratio (r) around 0.0015, potentially measurable in near-future experiments. Additionally, the proton decay lifetime in the presence of dimension-5 operators is found to be above the current limit imposed by the Super-Kamiokande experiment. A realistic scenario of reheating and non-thermal leptogenesis is employed, where the reheating temperature (Tr) lies within the (2 x 10(6) less than or similar to Tr less than or similar to 2 x 10(9)) GeV range, while considering the gravitino as a viable dark matter (DM) candidate.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Raymond T. Co, Benjamin Sheff, James D. Wells
Summary: Split Higgsinos, a class of models to explain dark matter, may soon be detected by multiple current experimental avenues. These models suggest a large split in scales between the electroweak scale and decoupled scalars, with relatively light Higgsinos between the two. They require few parameters, but can still explain gauge coupling unification, dark matter, and the hierarchy between the Planck and electroweak scales. We analyze the prospects of detecting split Higgsinos in current and future experiments, including the promising discovery potentials in electron electric dipole moment experiments.
Article
Astronomy & Astrophysics
Antonio Delgado, Mariano Quiros
Summary: The study focuses on a cosmologically stable neutral component from a nearly pure SU(2) doublet as a candidate for dark matter, with a mass of around 1.1 TeV. Investigating the role of Higgsino as dark matter in the context of the minimal supersymmetric extension of the Standard Model, the search for light supersymmetric spectra in models with universal and nonuniversal Higgs and gaugino Majorana masses is discussed. The possibilities for detecting the lightest supersymmetric particles, gluino, top squark, and stau, in future collider experiments are also explored.
Article
Physics, Particles & Fields
Salvatore Bottaro, Dario Buttazzo, Marco Costa, Roberto Franceschini, Paolo Panci, Diego Redigolo, Ludovico Vittorio
Summary: This study focuses on studying scenarios where Dark Matter is a weakly interacting particle embedded in an Electro Weak multiplet. Calculations are done for both scalar and fermionic WIMPs, including effects like Sommerfeld enhancement and bound states formation. The study also outlines strategies to probe these scenarios at future experiments, including high energy muon colliders and gamma-ray telescopes.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
Ernesto Arganda, Antonio Delgado, Roberto A. Morales, Mariano Quiros
Summary: In this study, a novel supersymmetric signal with gluinos decaying into jets and bino-like neutralino is analyzed at the LHC. The signal involves four light jets, four b-jets, and a significant amount of missing transverse energy. Backgrounds such as top quark pairs, V + jets, and top quark pairs with additional electroweak boson productions are identified as challenging, but prospects for discovery at high luminosity phases of the LHC are promising.
Article
Astronomy & Astrophysics
Nobuchika Okada, Digesh Raut, Qaisar Shafi, Anil Thapa
Summary: A pseudo-Goldstone boson dark matter particle is proposed in the context of SO(10) grand unified theory, escaping detection in direct experiments which otherwise would constrain parameter space. Analysis is done on two scenarios of symmetry breaking to the Standard Model, with different implications for allowed parameter space and compatibility with experimental constraints.
Article
Astronomy & Astrophysics
Shinsuke Kawai, Nobuchika Okada
Summary: A novel inflationary model in the context of gauge mediated supersymmetry breaking is discussed, with implications for dark matter and cosmic microwave background radiation. Relations between the gravitino dark matter mass and supersymmetry breaking scale are found, and future observations are expected to provide tighter constraints on these parameters.
Article
Physics, Multidisciplinary
Mikhail Shaposhnikov, Andrey Shkerin, Inar Timiryasov, Sebastian Zell
Summary: This passage discusses a novel mechanism for producing singlet fermions in the early Universe through gravity-induced interactions. These fermions can act as dark matter particles and are applicable to a wide range of dark matter particle masses. The potential observational consequences of producing keV-scale dark matter in this way, particularly for right-handed neutrinos, are also explored. The authors suggest that determining the momentum distribution of primordial dark matter may shed light on gravity-induced fermionic interactions.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Victor Knapp-Perez, Xiang-Gan Liu, Hans Peter Nilles, Saul Ramos-Sanchez, Michael Ratz
Summary: Modular flavor symmetries offer a compelling solution to the flavor problem. It has been argued that moduli values close to specific values like t = i or t = w provide the best fits to data. The presence of hidden matter fields, necessary to uplift symmetric AdS vacua, leads to a dynamical mechanism that results in such values of t.
Article
Astronomy & Astrophysics
Leah Jenks, Konstantinos Koutrolikos, Evan McDonough, Stephon Alexander, S. James Gates Jr
Summary: We investigate the contribution of higher spin particles in the signal of direct detection searches for dark matter. We consider a bosonic or fermionic higher spin dark matter (HSDM) candidate which interacts with the Standard Model via a dark U(1) mediator. For a particular subclass of interactions, spin-polarized targets may be used for spin determination, while the recoil energy dependence of the signal determines the spin.
Article
Physics, Nuclear
Ming-Jie Zhang, Shu-Min Zhao, Xing-Xing Dong, Zhong-Jun Yang, Tai-Fu Feng
Summary: The BLMSSM, an extension of the MSSM, investigates the properties and parameter space of the lightest scalar neutrino as a candidate for dark matter.
Article
Astronomy & Astrophysics
Yasar Hicyilmaz, Levent Selbuz, Levent Solmaz, Cem Salih Un
Summary: We study a type of U(1)'-extended minimal supersymmetric extension of the Standard Model (MSSM) in which the U(1)' symmetry breaking is achieved by vacuum expectation values of four MSSM singlet fields. The U(1)' charges are assigned to the three families in a universal way, and to satisfy the anomaly cancellation condition, heavy and decoupled exotic fields are introduced. We discuss different charge assignments, anomaly cancellation, Z'/Z hierarchy, neutralinos, charginos, and the Higgs sector. The typical spectra contain two CP-odd Higgs bosons, predominantly composed of MSSM singlet fields, with masses below 200 GeV and 600 GeV, respectively. The relic density of dark matter can be saturated by neutralinos, where the LSP neutralinos are predominantly formed by MSSM singlet fields below 600 GeV, while MSSM neutralino LSP can be realized above this mass scale. We classify the implications into three scenarios: Scenario I involves NLSP charginos, Scenario II involves charginos that do not participate in coannihilation processes with the LSP neutralino, and Scenario III involves MSSM neutralinos with large scattering cross sections excluded by direct detection experiments.
Article
Physics, Particles & Fields
Junjie Cao, Demin Li, Jingwei Lian, Yuanfang Yue, Haijing Zhou
Summary: The general NMSSM describes singlino-dominated dark matter properties through four independent parameters, influencing annihilation and scattering processes. Compared to Z(3)-NMSSM, which introduces an additional parameter, experiments strongly favor the general NMSSM.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
