Results 41 to 50 of about 123,672 (318)

More About Discrete Gauge Anomalies

, 1992
I discuss and extend several results concerning the cancellation of discrete gauge anomalies. I show how heavy fermions do not decouple in the presence of discrete gauge anomalies.
Alford, Alford, Atick, Banks, Banks, Banks, Banks, Choi, Chun, Chung, D'Hooker, Dine, Dine, Dixon, Eguchi, Font, Glashow, Green, Ibáñez, Ibáñez, Ibáñez, Ibáñez, Kapetanakis, Krauss, Krauss, Krauss, Lazarides, Lerche, Luis E. Ibáñez, Preskill, Preskill, Preskill, Rey, van Nieuwenhuizen, White, Witten   +35 more
core   +2 more sources

Discrete symmetries in dynamo reversals [PDF]

Physics of Plasmas, 2017
Quantification of the velocity and magnetic field reversals in dynamo remains an interesting challenge. In this paper, using group-theoretic analysis, we classify the reversing and non-reversing Fourier modes during a dynamo reversal in a Cartesian box.
Riddhi Bandyopadhyay, Mahendra K. Verma
openaire   +3 more sources

Dirac neutrinos and anomaly-free discrete gauge symmetries

, 2014
Relying on Dirac neutrinos allows an infinity of anomaly-free discrete gauge symmetries to be imposed on the Supersymmetric Standard Model, some of which are GUT-compatible.Comment: 24 pages, minor changes, existence of flipped discrete gauge ...
Christoph Luhn, Marc Thormeier, P.-H. Gu, S. Weinberg   +3 more
core   +1 more source

Type II Duality Symmetries in Six Dimensions [PDF]

, 1995
We discuss the different discrete duality symmetries in six dimensions that act within and between (i) the 10-dimensional heterotic string compactified on $T^4$, (ii) the 10-dimensional Type IIA string compactified on $K3$ and (iii) the 10-dimensional ...
Aspinwall, Behrndt, Behrndt, Bergshoeff, Bergshoeff, Bergshoeff, Bergshoeff, Bert Janssen, Buscher, Castellani, Castellani, Dai, Dine, Duff, E. Bergshoeff, Horowitz, Horowitz, Hull, Hull, Kallosh, Klaus Behrndt, Maharana, Marcus, Romans, Scherk, Townsend, Witten, Witten   +27 more
core   +3 more sources

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

FEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source

Diffusion Spectrum Imaging Maps Early Axonal Loss and a Unique Progressive Signal in Neuronal Intranuclear Inclusion Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To delineate specific in vivo white matter pathology in neuronal intranuclear inclusion disease (NIID) using diffusion spectrum imaging (DSI) and define its clinical relevance. Methods DSI was performed on 42 NIID patients and 38 matched controls.
Kaiyan Jiang, Yixiu Pei, Xiaobao Hu, Ying Xiong, Fang Wang, Yanyan Yu, Min Zhu, Dandan Tan, Meihong Zhou, Daojun Hong, Fuqing Zhou   +10 more
wiley   +1 more source

Constraints on discrete global symmetries in quantum gravity

Journal of High Energy Physics, 2021
The question whether global symmetries can be realized in quantum-gravity-matter-systems has far-reaching phenomenological consequences. Here, we collect evidence that within an asymptotically safe context, discrete global symmetries of the form ℤ n , n >
Passant Ali, Astrid Eichhorn, Martin Pauly, Michael M. Scherer   +3 more
doaj   +1 more source

Lie discrete symmetries of lattice equations

, 2003
We extend two of the methods previously introduced to find discrete symmetries of differential equations to the case of difference and differential-difference equations.
Decio Levi, Gaeta G, Gel'fand I M, Hernández Heredero R, Ince E L, Kelley M G, Levi D, Levi D, Levi D, Levi D, Levi D, Miguel A Rodríguez, Olver P J, Reid G J, Reid G J Boulton A Lisle I G, Toda M   +15 more
core   +1 more source

Discrete symmetries from hidden sectors [PDF]

, 2015
We study the presence of abelian discrete symmetries in globally consistent orientifold compactifications based on rational conformal field theory. We extend previous work [1] by allowing the discrete symmetries to be a linear combination of U(1) gauge ...
Anastasopoulos, Pascal, Richter, Robert, Schellekens, A. N.   +2 more
core   +3 more sources

Hopfield Neural Networks for Online Constrained Parameter Estimation With Time‐Varying Dynamics and Disturbances

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley   +1 more source