Results 41 to 50 of about 106,164 (292)

A semiclassical kinetic theory of Dirac particles and Thomas precession

Physics Letters B, 2015
Kinetic theory of Dirac fermions is studied within the matrix valued differential forms method. It is based on the symplectic form derived by employing the semiclassical wave packet build of the positive energy solutions of the Dirac equation.
Ömer F. Dayi, Eda Kilinçarslan
doaj   +1 more source

Unitarity bounds on effective field theories at the LHC

Journal of High Energy Physics, 2022
Effective Field Theory (EFT) extensions of the Standard Model are tools to compute observables (e.g. cross sections with partonic center-of-mass energy s ̂ $$ \sqrt{\hat{s}} $$ ) as a systematically improvable expansion suppressed by a new physics scale ...
Timothy Cohen, Joel Doss, Xiaochuan Lu
doaj   +1 more source

Quantizing String Theory in AdS_5 X S^5: Beyond the pp-Wave

, 2003
In a certain kinematic limit, where the effects of spacetime curvature (and other background fields) greatly simplify, the light-cone gauge world-sheet action for a type IIB superstring on AdS_5 x S^5 reduces to that of a free field theory.
Beisert, Beisert, Beisert, Beisert, Bena, Berenstein, Blau, Boerner, Constable, Constable, Curtis G. Callan, Green, Gubser, Hok Kong Lee, Ian Swanson, John H. Schwarz, Kallosh, Kristjansen, Maldacena, Metsaev, Metsaev, Minahan, Parnachev, Santambrogio, Tristan McLoughlin, Witten, Xinkai Wu   +26 more
core   +1 more source

Superstring Scattering from O-planes [PDF]

, 2006
We write the vertex operators of massless NS-NS and RR states of Type II superstring theory in the presence of Orientifold p-planes. They include the usual vertex operators of Type II theory and their images.
Barbon, Callan, Callan, Craps, Dai, Dasgupta, Friedan, Friedan, Friedan, Garousi, Garousi, Green, Green, Gubser, Huber, Klebanov, Mohammad R. Garousi, Pachas, Polchinski, Polchinski, Polchinski, Polchinski, Polchinski, Schnitzer, Scrucca, Stefanski   +25 more
core   +4 more sources

Multiband Switchable Microwave Absorbing Metamaterials Based on Reconfigurable Kirigami–Origami

Advanced Functional Materials, EarlyView.
A reconfigurable metamaterial featuring tunable microwave‐absorbing and load‐bearing performance is proposed. Stretchable kirigami and bistable origami configurations are integrated as actuating components, and the synergistic deformation mechanisms are systematically analyzed.
Weimin Ding, Zhong Zhang, Zeang Zhao, Shengyu Duan, Panding Wang, Xiaogang Guo, Hongshuai Lei, Daining Fang   +7 more
wiley   +1 more source

A framework for the calculation of the ΔNγ⁎ transition form factors on the lattice

Nuclear Physics B, 2014
Using the non-relativistic effective field theory framework in a finite volume, we discuss the extraction of the ΔNγ⁎ transition form factors from lattice data.
Andria Agadjanov, Véronique Bernard, Ulf-G. Meißner, Akaki Rusetsky   +3 more
doaj   +1 more source

The study of neutral triple gauge couplings in the process e+e− → Zγ including unitarity bounds

Nuclear Physics B, 2021
The neutral triple gauge couplings (nTGCs) provide a unique opportunity to probe new physics beyond the Standard Model. The nTGCs can be described by an effective field theory (EFT), which is valid only under a certain energy scale. One of the signatures
Qing Fu, Ji-Chong Yang, Chong-Xing Yue, Yu-Chen Guo   +3 more
doaj   +1 more source

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

Observation of Relativistic Domain Wall Motion in Amorphous Ferrimagnets

Advanced Functional Materials, EarlyView.
Domain walls in ferrimagnets and antiferromagnets move as relativistic sine‐Gordon solitons, with the spin‐wave velocity setting their speed limit. Such relativistic domain‐wall motion is demonstrated in amorphous GdFeCo near angular momentum compensation, where current‐driven walls reach 90% of the 2 kms−1 spin‐wave speed, enabling ultrafast, device ...
Pietro Diona, Luca Maranzana, Sergey Artyukhin, Giacomo Sala   +3 more
wiley   +1 more source

An Urban Intersection Model Based on Multi-commodity Kinematic Wave Theories [PDF]

2008 11th International IEEE Conference on Intelligent Transportation Systems, 2008
Traffic flow models of an urban intersection can be used to evaluate its performance and offer a base for traffic control strategies, road network design, and so on. The complex conflicts among traffic streams at an urban intersection, including zero conflict, merging conflict, diverging conflict and crossing conflict, have not been synthetically ...
Liang Chen, Wen-Long Jin, Jianming Hu, Yi Zhang   +3 more
openaire   +1 more source