Results 131 to 140 of about 61,183 (280)

Chiral Kirigami for Bend‐Tolerant Reconfigurable Hologram with Continuously Variable Chirality Measures

open access: yesAdvanced Materials, Volume 36, Issue 30, July 25, 2024.
This work demonstrates that chirality‐guided pixelation of plasmonic kirigami sheets allows tunable multiplexed holography at terahertz (THz) frequencies. The slanted Au strips enable light modulation and real‐time switching of complex grayscale 3D images.
Won Jin Choi   +3 more
wiley   +1 more source

Graph‐theoretical chirality measure and chirality–property relations for chemical structures with multiscale mirror asymmetries

open access: yesChirality, Volume 36, Issue 6, June 2024.
Chirality measures can be exceptionally difficult to calculate and reveal weak, if any, correlations with physical, chemical, and biological properties of chemical structures. Applying the concept of torsion in the framework of discrete mathematics to graph representations of molecular and nanoscale helicoids, we show that graph‐theoretical chirality ...
Minjeong Cha   +4 more
wiley   +1 more source

Investigating light NMSSM pseudoscalar states with boosted ditau tagging [PDF]

open access: yes, 2016
A bstractWe study a class of realizations of the Next-to-Minimal Supersymmetric Standard Model that is motivated by dark matter and Higgs data, and in which the lightest pseudoscalar Higgs boson mass is smaller than twice the bottom quark mass and ...
É. Conte   +4 more
semanticscholar   +1 more source

The Combination of the Azimuthally and Radially Polarized Beams: Helicity and Momentum Densities, Generation, and Optimal Chiral Light

open access: yesAdvanced Photonics Research, Volume 5, Issue 5, May 2024.
In this work, the properties of the azimuthally radially polarized beam (ARPB), a superposition of azimuthally and radially polarized beams, are explored. Their phase difference is tuned to achieve an ARPB with optimal chirality density, that stems from purely longitudinal fields on the beam axis.
Albert Herrero‐Parareda   +1 more
wiley   +1 more source

Model discrimination in pseudoscalar-meson photoproduction [PDF]

open access: yesPhysics Letters B, 2016
To learn about a physical system of interest, experimental results must be able to discriminate among models. We introduce a geometrical measure to quantify the distance between models for pseudoscalar-meson photoproduction in amplitude space. Experimental observables, with finite accuracy, map to probability distributions in amplitude space, and the ...
Nys, J.   +3 more
openaire   +5 more sources

Role of vector and pseudoscalar mesons in understanding $1/2^-$ $N^*$ and $\Delta$ resonances

open access: yes, 2013
A study of nonstrange meson-baryon systems has been made with the idea of understanding the properties of the low-lying $1/2^-$ $N^*$ and $\Delta$ resonances.
Hosaka, A.   +3 more
core   +1 more source

Learning rotations

open access: yesMathematical Methods in the Applied Sciences, Volume 47, Issue 3, Page 1204-1217, February 2024.
Many problems in computer vision today are solved via deep learning. Tasks like pose estimation from images, pose estimation from point clouds or structure from motion can all be formulated as a regression on rotations. However, there is no unique way of parametrizing rotations mathematically: matrices, quaternions, axis‐angle representation or Euler ...
Alberto Pepe   +2 more
wiley   +1 more source

Trace and Axial Anomalies on Equal Footing

open access: yesAdvances in High Energy Physics, 2020
We discussed that for some particular nonsupersymmetric theories, a generalized symmetry that includes both the scale and axial transformations and leads to a single current may contain also a pseudoscalar term. The method, inspired by the superconformal
Renata Jora
doaj   +1 more source

Electromagnetic properties of ground and excited state pseudoscalar mesons

open access: yes, 2005
The axial-vector Ward-Takahashi identity places constraints on particular properties of every pseudoscalar meson. For example, in the chiral limit all pseudoscalar mesons, except the Goldstone mode, decouple from the axial-vector current.
A. Höll   +11 more
core   +1 more source

Pseudoscalar condensation induced by chiral anomaly and vorticity for massive fermions [PDF]

open access: yes, 2016
We derive the pseudoscalar condensate induced by anomaly and vorticity from the Wigner function for massive fermions in homogeneous electromagnetic fields. It has an anomaly term and a force-vorticity coupling term.
Ren-Hong Fang   +3 more
semanticscholar   +1 more source

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