Results 91 to 100 of about 219,120 (312)

Quantum MHV diagrams [PDF]

, 2016
Over the past two years, the use of on-shell techniques has deepened our understanding of the S-matrix of gauge theories and led to the calculation of many new scattering amplitudes.
7th Workshop on Continuous Advances in QCD, Brandhuber, A, TRAVAGLINI, G   +2 more
core  

Infrared Singularities and Soft Gluon Resummation with Massive Partons

, 2010
Infrared divergences of QCD scattering amplitudes can be derived from an anomalous dimension matrix, which is also an essential ingredient for the resummation of large logarithms due to soft gluon emissions.
Ahrens, Ahrens, Andrea Ferroglia, Aybat, Aybat, Bauer, Bauer, Becher, Becher, Becher, Becher, Ben D. Pecjak, Beneke, Bonciani, Bonciani, Catani, Catani, Catani, Catani, Collins, Czakon, Czakon, Czakon, Czakon, Dixon, Ferroglia, Ferroglia, Gardi, Kidonakis, Korchemsky, Li Lin Yang, Matthias Neubert, Mitov, Mitov, Mitov, Moch, Neubert, Neubert, Sterman, Sterman   +39 more
core   +1 more source

Mathematical Aspects of Scattering Amplitudes [PDF]

Journeys Through the Precision Frontier: Amplitudes for Colliders, 2015
In these lectures we discuss some of the mathematical structures that appear when computing multi-loop Feynman integrals. We focus on a specific class of special functions, the so-called multiple polylogarithms, and discuss introduce their Hopf algebra structure.
openaire   +3 more sources

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

The Grassmannian for celestial superamplitudes

Journal of High Energy Physics, 2021
Recently, scattering amplitudes in four-dimensional Minkowski spacetime have been interpreted as conformal correlation functions on the two-dimensional celestial sphere, the so-called celestial amplitudes.
Livia Ferro, Robert Moerman
doaj   +1 more source

Zero-norm states and High-energy Symmetries of String Theory

, 2004
We derive stringy Ward identities from the decoupling of two types of zero-norm states in the old covariant first quantized (OCFQ) spectrum of open bosonic string.
Bonelli, Chan, Chuan-Tsung Chan, Chung, Chung, Evans, Gross, Gross, Gross, Gross, Gross, Gross, Gross, Gross, Isberg, Jen-Chi Lee, Kao, Klebanov, Lee, Lee, Lee, Lee, Lee, Lee, Lee, Lindstrom, Moore, Politzer, Sasaki   +28 more
core   +1 more source

Terahertz‐Driven Ultrafast Dynamics of Rare‐Earth Nickelates by Controlling Only the Charge Degree of Freedom

Advanced Functional Materials, EarlyView.
The THz drive of the Mott insulating state of a rare‐earth nickelate induces instantaneous insulator‐metal transition via quantum tunneling of valence electrons across the bandgap. This transition is pure electronic and highly non‐thermal, which may find its applications in ultrafast opto‐electronics with enhanced performance and minimal device size ...
Gulloo Lal Prajapati, Sergey Kovalev, Igor Ilyakov, Atiqa Arshad, Gaurav Dubey, Ketan S. Navale, Dhanvir Singh Rana, Jan‐Christoph Deinert   +7 more
wiley   +1 more source

Gravitational Regge bounds

SciPost Physics
We review the basic assumptions and spell out the detailed arguments that lead to the bound on the Regge growth of gravitational scattering amplitudes.
Kelian Häring, Alexander Zhiboedov
doaj   +1 more source

Scattering amplitudes for binary systems beyond GR

Journal of High Energy Physics, 2021
Amplitude methods have proven to be a promising technique to perform Post-Minkowskian calculations used as inputs to construct gravitational waveforms. In this paper, we show how these methods can be extended beyond the standard calculations in General ...
Mariana Carrillo González, Claudia de Rham, Andrew J. Tolley   +2 more
doaj   +1 more source

The Four Dimensional Helicity Scheme Beyond One Loop

, 2012
I describe a procedure by which one can transform scattering amplitudes computed in the four dimensional helicity scheme into properly renormalized amplitudes in the 't Hooft-Veltman scheme.
J. Collins, William B. Kilgore
core   +1 more source