Results 71 to 80 of about 2,015,397 (315)
Non-Anomalous Discrete R-symmetry Decrees Three Generations
, 2012 We show that more than two generations of quarks and leptons are required to have an anomaly free discrete R-symmetry larger than R-parity, provided that the supersymmetric Standard Model can be minimally embedded into a grand unified theory.
Evans, Jason L. +3 more
core +1 more source
Spontaneous symmetry breaking in a quadratically-driven nonlinear photonic lattice [PDF]
, 2017 We investigate the occurrence of a phase transition, characterized by the spontaneous breaking of a discrete symmetry, in a driven-dissipative Bose-Hubbard lattice in presence of two-photon coherent driving. The driving term does not lift the original $U(
Savona, Vincenzo
core +2 more sources
Chemical Reviews, 2022 The field of metallosupramolecular chemistry has advanced rapidly in recent years. Much work in this area has focused on the formation of hollow self-assembled metal-organic architectures and exploration of the applications of their confined nanospaces ...
Charlie T. McTernan +2 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.The puncture prevention and energy absorption performance of composite metal foam (CMF) are studied experimentally and numerically for hazardous materials transportation protection. The numerical model implementing air within the CMF (nonhomogeneous model using fluid cavity technique) predicts puncture more accurately compared to the homogeneous CMF ...
Aman Kaushik, Afsaneh Rabiei
wiley +1 more source
Emergent discrete 3-form symmetry and domain walls
Physics Letters B, 2020 We show that axion models with the domain wall number k in (3+1) dimensions, i.e., periodic scalar field theories admitting k axion domain walls, exhibit an emergent Zk 3-form symmetry for k>1 in addition to a conventional Zk 0-form symmetry.
Yoshimasa Hidaka +2 more
doaj +1 more source
Anomalies of Discrete Symmetries and Gauge Coupling Unification
, 2006 The anomaly of a discrete symmetry is defined as the Jacobian of the path-integral measure. Assuming that the anomaly at low energies is cancelled by the Green-Schwarz (GS) mechanism at a fundamental scale, we investigate possible Kac-Moody levels for ...
Araki, Takeshi
core +2 more sources
Axion Like Particles and the Inverse Seesaw Mechanism [PDF]
, 2015 Light pseudoscalars known as axion like particles (ALPs) may be behind physical phenomena like the Universe transparency to ultra-energetic photons, the soft $\gamma$-ray excess from the Coma cluster, and the 3.5 keV line.
Carvajal, C. D. R. +3 more
core +2 more sources
Advanced Functional Materials, EarlyView.Sub‐monolayer titania grafted onto mesoporous silica enables solvent‐free photocatalytic upgrading of furfural and cyclopentanone into jet fuel precursors. Advanced spectroscopic methods reveal tunable surface speciation, acidity, and bandgaps, enhancing catalytic efficiency.
Mark A. Isaacs +12 more
wiley +1 more source
Dissipative discrete time crystals in a pump-modulated Kerr microcavity
Communications Physics, 2022 Discrete time crystals are a new state of matter emerging via spontaneous discrete translational symmetry breaking in time. The authors demonstrate that a dissipative discrete time crystal appears in an optical microcavity pumped by a phase-modulated ...
Hossein Taheri +3 more
doaj +1 more source
Quark-lepton complementarity and tribimaximal neutrino mixing from discrete symmetry [PDF]
, 2011 The quark-lepton complementarity (QLC) relations indicate a deep structure that interrelates quarks and leptons. We propose new scenarios, in a seesaw framework with discrete A{sub 4} flavor symmetry, which can accommodate the QLC relations and the ...
Y. Ahn, Hai-Yang Cheng, Sechul Oh
semanticscholar +1 more source