Article
Physics, Multidisciplinary
Andrew K. Yi, Saebyeok Ahn, Caglar Kutlu, JinMyeong Kim, Byeong Rok Ko, Boris I. Ivanov, HeeSu Byun, Arjan F. van Loo, SeongTae Park, Junu Jeong, Ohjoon Kwon, Yasunobu Nakamura, Sergey V. Uchaikin, Jihoon Choi, Soohyung Lee, MyeongJae Lee, Yun Chang Shin, Jinsu Kim, Doyu Lee, Danho Ahn, SungJae Bae, Jiwo Lee, Younggeun Kim, Violeta Gkika, Ki Woong Lee, Seonjeong Oh, Taehyeon Seong, DongMin Kim, Woohyun Chung, Andrei Matlashov, SungWoo Youn, Yannis K. Semertzidis
Summary: In this study, an axion dark matter search was performed using the CAPP-12TB haloscope, and the results excluded axions with an axion-photon coupling constant of 6.2 x 10-16 GeV-1 in the axion mass range of 4.51 to 4.59 mu eV at a 90% confidence level. The achieved experimental sensitivity also excluded Kim-Shifman-Vainshtein-Zakharov axion dark matter that constitutes only 13% of the local dark matter density. The CAPP-12TB haloscope will continue the search for a wide range of axion masses.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
On Kim, Yannis K. Semertzidis
Summary: This paper proposes a novel method for probing the axion-induced oscillating EDM in storage rings using a radio frequency (rf) Wien filter. The method generates a spin resonance at the frequency of the axion sidebands and g-2 frequency, and is confirmed by analytical estimation and simulation. A systematic study suggests that this method is unlikely to be limited by Wien filter misalignment.
Article
Physics, Particles & Fields
F. Krinner, N. Kaiser
Summary: In this paper, we introduce optimal observables to measure the Pauli form factor F-2 of the tau-lepton in the pair-production process e(-)e(+) -> tau(-)tau(+) based on the intensity distribution of decay products. The spin-density matrix for the production process is calculated in QED up to order alpha(3), considering virtual photon-loops, soft bremsstrahlung, and gamma Z(0) interference. The decay channel (rho(-)nu(tau)) x (rho(+)(nu) over bar (tau)) is found to provide the best resolution for ReF2(s) and ImF(2)(s) due to its high branching fraction. We also examine the bias introduced in the determination of F-2 when the production spin-density matrix is taken at the tree-level (one-photon exchange) approximation.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Multidisciplinary
C. Abel, N. J. Ayres, G. Ban, G. Bison, K. Bodek, V. Bondar, E. Chanel, C. B. Crawford, M. Daum, B. Dechenaux, S. Emmenegger, P. Flaux, W. C. Griffith, P. G. Harris, Y. Kermaidic, K. Kirch, S. Komposch, P. A. Koss, J. Krempel, B. Lauss, T. Lefort, P. Mohanmurthy, O. Naviliat-Cuncic, D. Pais, F. M. Piegsa, G. Pignol, M. Rawlik, D. Rics, S. Roccia, D. Rozpedzik, P. Schmidt-Wellenburg, N. Severijns, Y. V. . . . . Stadnik, J. A. Thorne, A. Weis, E. Wursten, J. Zejma, G. Zsigmond
Summary: Ultra-low-mass axions are considered a possible type of dark matter and could form a coherent oscillating classical field. Nuclear spins in experiments on Earth were tested for their coupling to this oscillating axion dark matter field as they travel along Earth's trajectory through our Galaxy. The experiment aimed to observe an oscillating pseudo-magnetic field modulating the spin precession of nuclear spins but found no frequency modulation signal. The search covered a range of axion masses from 10-16 eV ≤ ma ≤ 10-13 eV and achieved a peak sensitivity to the axion-nucleon coupling of gaNN ≈ 3.5 x 10-6 GeV-1.
Article
Physics, Multidisciplinary
A. E. Carcamo Hernandez, Catalina Espinoza, Juan Carlos Gomez-Izquierdo, Myriam Mondragon
Summary: This article proposes a predictive Q(4) flavored 2HDM model, which expands the scalar sector by including additional gauge singlet scalars and the fermion sector by including right-handed Majorana neutrinos. The model successfully explains the measured dark matter relic abundance and is consistent with direct detection constraints, as well as with the lepton and baryon asymmetries of the Universe and the muon anomalous magnetic moment.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Astronomy & Astrophysics
Giorgio Arcadi, Andreas Bally, Florian Goertz, Karla Tame-Narvaez, Valentin Tenorth, Stefan Vogl
Summary: The study suggests that the XENON1T electron recoil excess could be related to neutrino-electron interactions, while dark matter-electron scattering is less likely to lead to significant improvements. The parameter space is severely constrained, but potentially problematic bounds on electron couplings can be circumvented through a late phase transition in the new scalar sector.
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
Engineering, Electrical & Electronic
Abhishek Kumar Jha, Adam Lamecki, Michal Mrozowski
Summary: This article revisits the electric, magnetic, and toroidal dipolar moments in metamaterial structure and presents a flatland design for generating a toroidal dipolar response. Through numerical analysis and electromagnetic multipole theory, it is found that the earlier symmetric unit cell design cannot produce a toroidal dipolar moment. A new planar metasurface design is proposed, which shows a higher scattered power and a dominant toroidal response when excited by a TM-polarized electromagnetic wave.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Quantum Science & Technology
Alexander O. Sushkov
Summary: The dark-matter puzzle is a significant open problem in modern physics, and the ultralight axion is a well-motivated candidate for dark matter. Various precision experiments are searching for the non-gravitational interactions of axionlike dark matter, with some nearing the quantum limits of sensitivity. This Perspective discusses quantum engineering approaches to overcome these limits and describes the utilization of metrological and sensing techniques from quantum information science in experimental physics.
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
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
Shao-Ping Li
Summary: We find that in thermal plasma, scattering and decay can have the same order of couplings. This is contrary to the common belief that scattering is suppressed compared to decay. We provide an example of freeze-in production of heavy dark matter to illustrate this point. The relative contributions of scattering and decay depend on the thermal coupling strength.
Article
Astronomy & Astrophysics
Kento Asai, Coh Miyao, Shohei Okawa, Koji Tsumura
Summary: This study investigates a renormalizable scalar singlet dark matter model based on Z4 lepton flavor symmetry, with the introduction of a mu tau-philic scalar doublet as a mediator connecting dark matter and standard model particles. The flavor off-diagonal interactions of scalar mediators help to easily maintain the observed relic abundance of dark matter and satisfy the current severe constraints from various experiments and observations. The possibility of dark matter direct detection through a one-loop process is also explored, and it is found that the relic abundance of dark matter and the discrepancy of the muon anomalous magnetic moment can be explained simultaneously by the mu tau-philic scalar mediator.
Article
Chemistry, Applied
Byung Hak Jhun, Soo Young Park, Youngmin You
Summary: Circularly polarized luminescence (CPL) is a unique way of emitting light that can be used for visualizing target analytes. CPL sensors can detect changes in an asymmetric environment by altering the polarization direction, magnitude, or peak wavelength of emitted light.
Article
Astronomy & Astrophysics
Ernest Ma
Summary: According to the proposal, lepton number is considered as the result of a spontaneously broken non-Abelian gauge SU(2)(N) symmetry. New fermions are added to support this new symmetry, with their spontaneous breaking allowing them to be part of the dark sector, potentially contributing significantly to the muon anomalous magnetic moment.
Article
Physics, Nuclear
Yang Bai, Wai-Yee Keung
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2015)
Article
Astronomy & Astrophysics
W. -Y. Keung, D. Marfatia
Article
Physics, Particles & Fields
Ahmed Ismail, Wai-Yee Keung, Kuo-Hsing Tsao, James Unwin
Article
Physics, Particles & Fields
Kingman Cheung, Wai-Yee Keung, Chih-Ting Lu, Po-Yan Tseng
JOURNAL OF HIGH ENERGY PHYSICS
(2017)
Article
Physics, Particles & Fields
Kingman Cheung, Wai-Yee Keung, Po-Yan Tseng
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
Article
Physics, Particles & Fields
Kingman Cheung, Wai-Yee Keung, Ying-nan Mao, Chen Zhang
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Wai-Yee Keung, Danny Marfatia, Po-Yan Tseng
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Astronomy & Astrophysics
Kingman Cheung, Wai-Yee Keung, Jae Sik Lee, Po-Yan Tseng
Article
Physics, Particles & Fields
Kingman Cheung, Wai-Yee Keung, Chih-Ting Lu, Po-Yan Tseng
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Particles & Fields
Wai-Yee Keung, Danny Marfatia, Po-Yan Tseng
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Astronomy & Astrophysics
Kingman Cheung, Wai-Yee Keung, Po-Yan Tseng
Summary: By investigating the isodoublet vector leptoquark V-2, we can address the B anomalies, explain the muon and electron anomalous magnetic moments, as well as account for the recent W-mass anomaly.
Article
Astronomy & Astrophysics
Wai-Yee Keung, Ian Low, Yue Zhang
Article
Astronomy & Astrophysics
Vernon Barger, Edward Basso, Yu Gao, Wai-Yee Keung
Article
Astronomy & Astrophysics
Kingman Cheung, Wai-Yee Keung, Po-Yan Tseng
Article
Astronomy & Astrophysics
Kingman Cheung, Wai-Yee Keung, Po-Yan Tseng
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.
