Article
Physics, Multidisciplinary
Giorgio Arcadi, Lorenzo Calibbi, Marco Fedele, Federico Mescia
Summary: In light of recent experimental results, a set of models with minimal field content were studied for the first time, addressing dark matter, B anomalies, and the muon g-2 discrepancy. These models, utilizing heavy particles and chiral enhancement, can evade current direct search limits and be tested at present and future colliders.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
H. Sieber, D. Kirpichnikov, I. V. Voronchikhin, P. Crivelli, S. N. Gninenko, M. M. Kirsanov, N. Krasnikov, L. Molina-Bueno, S. K. Sekatskii
Summary: In addition to previously discussed vector-type new particles, this paper focuses on CP-even and CP-odd spin-0 dark matter mediators that can couple to muons and be produced in the bremsstrahlung reaction. The authors derive the differential cross sections involved and compare them to exact-tree-level calculations. The formalism derived can be applied in various experiments that could observe muon-spin-0 DM interactions.
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
Ernest Ma
Summary: The study shows that in a simple extension of the standard model, lepton number is elevated to a U(1)(L) gauge symmetry while preserving a conserved Z(3)(L) lepton symmetry, allowing for naturally small masses to be acquired from a previously proposed mechanism. Dark matter is described as a singlet scalar, with its dark symmetry derivable from Z(3)(L) and suggesting a possible explanation for the muon's g - 2 value.
Article
Astronomy & Astrophysics
Bastian Diaz Saez, Karim Ghorbani
Summary: In this study, a simple model with two singlet scalar dark matter candidates and a vector-like lepton was explored. The model can accommodate the correct dark matter relic abundance and the (g - 2)(mu) anomaly by having the masses of the three new fields around 100 GeV and the values of the minimum required couplings being order one, while evading collider and dark matter constraints.
Article
Physics, Multidisciplinary
Ian Holst, Dan Hooper, Gordan Krnjaic
Summary: This study suggests that the long-standing anomaly in muon g-2 may be explained by a new particle species that couples to dark matter and affects its annihilations in the early Universe. A comprehensive analysis of the model reveals a viable range of dark matter masses and predicts contributions that could potentially resolve the tension between early and late time measurements of the Hubble constant.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Karim Ghorbani
Summary: A model with vector dark matter interacting with standard model charged leptons through a scalar portal is studied, determining viable parameter space respecting various constraints. Results show partial sensitivity of Xenon1T upper bounds on DM-electron interactions to regions already excluded by the Orsay electron beam-dump experiment, and viable dark matter particles with masses around O(1) GeV evading direct detection are identified.
Article
Astronomy & Astrophysics
S. N. Gninenko, N. Krasnikov
Summary: This study presents a model that explains the anomaly of muon g-2 and the relic density of dark matter. It suggests an interaction between dark matter and the Standard Model mediated by a portal boson called phi. The study also identifies similar events that support this interaction, which opens up new directions for future research.
Article
Physics, Multidisciplinary
Yu-Dai Tsai, Patrick DeNiverville, Ming Xiong Liu
Summary: The research team studies hidden-sector particles in past, present, and future experiments, focusing on the minimal vector portal and next-to-minimal models, as well as inelastic dark matter. They demonstrate the power of proton fixed-target experiments as strong probes in the mass range of these models, setting limits and making projections based on various experiments. The studies also motivate the development of LongQuest as a multipurpose machine for exploring new physics.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Peter Cox, Chengcheng Han, Tsutomu T. Yanagida
Summary: This study shows that the recent measurements of the anomalous magnetic moment of the muon and dark matter can be explained simultaneously within the minimal supersymmetric standard model, with the most interesting parameter space regions to be tested by the next generation of dark matter direct detection experiments.
Article
Astronomy & Astrophysics
Junichiro Kawamura, Shohei Okawa, Yuji Omura
Summary: Motivated by the deviation of the W boson mass reported by the CDF collaboration, we study a lepton portal dark matter model. In this model, vectorlike leptons and a scalar dark matter exclusively couple to the extra leptons and muon, causing one-loop corrections that can shift the W boson mass. Additionally, this setup can explain the discrepancy in the muon anomalous magnetic moment and the DM density if the vectorlike lepton is lighter than 200 GeV and nearly degenerate with the DM particle. Furthermore, the constraints from collider experiments on such a light extra lepton can be evaded due to the existence of the DM particle.
Article
Astronomy & Astrophysics
Debasish Borah, Manoranjan Dutta, Satyabrata Mahapatra, Narendra Sahu
Summary: The gauged L-μ-L-τ model, an anomaly free extension of the standard model, provides a natural explanation for muon (g - 2) and can also incorporate dark matter to explain electron recoil excess by the XENON1T collaboration. The interactions between electron and dark fermions are mediated by the same neutral gauge boson responsible for generating muon (g - 2), and hybrid thermal and non-thermal mechanisms are required for dark matter annihilation to generate the relic density. The parameter space is tightly constrained and remains sensitive to ongoing and near future experiments.
Article
Astronomy & Astrophysics
Seong-Sik Kim, Hyun Min Lee, Adriana G. Menkara, Kimiko Yamashita
Summary: We propose a new model for lepton flavor and dark matter based on SU(2)(D) gauge symmetry and vectorlike leptons. We introduce a dark SU(2)(D) Higgs doublet and a Higgs bidoublet for mass mixing between the vectorlike lepton and the lepton. As a result, the seesaw lepton masses are generated and there are significant one-loop contributions to the muon g - 2. The tree-level mass mixing between the Z boson and the isospin-neutral gauge boson of SU(2)(D) explains the shift in the W boson mass. Additionally, the isospin charged gauge boson of SU(2)(D) becomes a plausible candidate for dark matter, with a small mass splitting tied to the modified W boson mass.
Article
Astronomy & Astrophysics
George N. Wojcik, Lisa L. Everett, Shu Tian Eu, Ricardo Ximenes
Summary: We propose a minimal construction using leptonic portal matter to address the muon g-2 anomaly. The parameter space, motivated by the kinetic mixing/vector portal dark matter model paradigm, is different from that of fermiophobic Z' gauge models and can be explored in current and forthcoming experiments.
Article
Astronomy & Astrophysics
Monika Blanke, Syuhei Iguro
Summary: We studied the potential of the Large Hadron Collider (LHC) in searching for a Z4-based two Higgs doublet model that can explain both the muon g-2 anomaly and observed dark matter. The couplings between the neutral scalars in the second Higgs doublet and mu and tau strongly contribute to the muon anomalous magnetic moment. A charged singlet scalar, which is a candidate for dark matter, has an upper limit on its mass due to the unitarity constraint. The study revisits the model and explores the LHC prospects for the single production of the mu tau flavor-violating neutral scalar, extending the LHC reach to the 1 TeV mass regime.
Article
Astronomy & Astrophysics
Akshay Ghalsasi, David McKeen, Ann E. Nelson
Article
Physics, Particles & Fields
Bridget Bertoni, Seyda Ipek, David McKeen, Ann E. Nelson
JOURNAL OF HIGH ENERGY PHYSICS
(2015)
Article
Physics, Multidisciplinary
Yu-Sheng Liu, David McKeen, Gerald A. Miller
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Particles & Fields
Patrick Draper, David McKeen
JOURNAL OF HIGH ENERGY PHYSICS
(2016)
Article
Astronomy & Astrophysics
David Curtin, Rouven Essig, Stefania Gori, Prerit Jaiswal, Andrey Katz, Tao Liu, Zhen Liu, David McKeen, Jessie Shelton, Matthew Strassler, Ze'ev Surujon, Brock Tweedie, Yi-Ming Zhong
Article
Physics, Multidisciplinary
David McKeen, Ann E. Nelson, Sanjay Reddy, Dake Zhou
PHYSICAL REVIEW LETTERS
(2018)
Article
Astronomy & Astrophysics
Brian Batell, Ayres Freitas, Ahmed Ismail, David McKeen
Article
Astronomy & Astrophysics
David McKeen, Nirmal Raj
Article
Astronomy & Astrophysics
Kyle Aitken, David McKeen, Thomas Neder, Ann E. Nelson
Article
Astronomy & Astrophysics
Akshay Ghalsasi, David McKeen, Ann E. Nelson
Article
Astronomy & Astrophysics
Brian Batell, Nicholas Lange, David McKeen, Maxim Pospelov, Adam Ritz
Article
Astronomy & Astrophysics
Yu-Sheng Liu, David McKeen, Gerald A. Miller
Article
Astronomy & Astrophysics
David McKeen, Ann E. Nelson
Article
Astronomy & Astrophysics
Brian Batell, Tao Han, David McKeen, Barmak Shams Es Haghi
Article
Astronomy & Astrophysics
Brian Batell, Ayres Freitas, Ahmed Ismail, David McKeen
Article
Physics, Multidisciplinary
G. Mustafa, S. K. Maurya, Saibal Ray, Faisal Javed
Summary: In this study, we investigate the geometry of wormholes in the framework of general relativity and explore how quantum wave dark matter affects the dynamical configuration of the shell surrounding the wormhole. By using specific shape functions and introducing quantum wave dark matter, we obtain reasonable wormhole solutions and observe its effects on the stability of the shell.
Article
Physics, Multidisciplinary
Pritha Dolai, Christian Maes
Summary: Calorimetry for equilibrium systems aims to determine the energy levels' occupation and distribution by measuring thermal response, while nonequilibrium versions provide additional information on the dynamical accessibility of these states. Using calculations on a driven exclusion process, it is confirmed that a fermionic nonequilibrium steady state with exact computation of specific heat can be achieved. The divergence at zero temperature occurs when the Fermi energy and the kinetic barrier for loading and emptying are approximately equal. Additionally, a stable low temperature regime of negative specific heat appears when the kinetic barrier is density-dependent, indicating an anti-correlation between the stationary occupation's temperature-dependence and excess heat.
Article
Physics, Multidisciplinary
F. F. Nascimento, V. B. Bezerra, J. M. Toledo
Summary: We obtained the metric of the Hayward black hole surrounded by a cloud of strings, and analyzed the effects of the string cloud on the regularity of the solution and the energy conditions. Various aspects such as horizons, geodesics, effective potential, and thermodynamics were investigated. We compared the obtained results with the literature corresponding to the Hayward black hole without a string cloud.
