Results 61 to 70 of about 221,951 (285)

Worldline geometries for scattering amplitudes

Journal of High Energy Physics
In this paper, we construct the path integral for infinite and semi-infinite scalar worldlines. We show that, at the asymptotic endpoints, on-shell physical states can be generated by inserting vertex operators at infinity.
Roberto Bonezzi, Maria Foteini Kallimani
doaj   +1 more source

Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May, Finn‐Lennard Janthur, Lena Kreie, Michael Müller, Sarah Seffer, Nick Schwarz, Jörg Hermsdorf, Thomas Hassel, Stefan Kaierle, Ludger Overmeyer   +9 more
wiley   +1 more source

Positivity properties of scattering amplitudes

Journal of High Energy Physics
We investigate positivity properties in quantum field theory (QFT). We provide evidence, and in some case proofs, that many building blocks of scattering amplitudes, and in some cases the full amplitudes, satisfy an infinite number of positivity ...
Johannes Henn, Prashanth Raman
doaj   +1 more source

Spinning amplitudes from scalar amplitudes

Journal of High Energy Physics, 2021
We provide a systematic method to compute tree-level scattering amplitudes with spinning external states from amplitudes with scalar external states in arbitrary spacetime dimensions.
Mahesh K. N. Balasubramanian, Raj Patil, Arnab Rudra   +2 more
doaj   +1 more source

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

Advanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik, Alexander Jelinek, Markus Alfreider, Jutta Luksch, Anton Hohenwarter, Florian Schaefer, Christian Motz, Daniel Kiener   +7 more
wiley   +1 more source

Chaotic scattering of highly excited strings

Journal of High Energy Physics, 2021
Motivated by the desire to understand chaos in the S-matrix of string theory, we study tree level scattering amplitudes involving highly excited strings. While the amplitudes for scattering of light strings have been a hallmark of string theory since its
David J. Gross, Vladimir Rosenhaus
doaj   +1 more source

Analyzing cancellation mechanism of the dark matter-quark scattering in a complex singlet extension of the Standard Model

Nuclear Physics B, 2023
We investigate a suppression mechanism of dark matter and quark scattering amplitudes in a complex singlet extension of the Standard Model. It has been pointed out that, in a some variant of the model, the scattering amplitudes cancel each other in the ...
Gi-Chol Cho, Chikako Idegawa
doaj   +1 more source

Flat-space scattering and bulk locality in the AdS/CFT correspondence

, 2000
The large radius limit in the AdS/CFT correspondence is expected to provide a holographic derivation of flat-space scattering amplitudes. This suggests that questions of locality in the bulk should be addressed in terms of properties of the S-matrix and ...
A. Martin, C. P. Burgess, D. Amati, D. J. Gross, D. J. Gross, D. W. Düsedau, D. Z. Freedman, E. Witten, F. Cerulus, J. Maldacena, L. Susskind, M. Abramowitz, M. Froissart, S. B. Giddings, S. S. Gubser, Steven B. Giddings, T. Inami, V. Balasubramanian, V. Balasubramanian, V. Balasubramanian, V. Ya. Fainberg   +20 more
core   +1 more source

Polarization transfer observables for quasielastic proton-nucleus scattering in terms of a complete Lorentz invariant representation of the NN scattering matrix [PDF]

, 1999
For the calculation of polarization transfer observables for quasielastic scattering of protons on nuclei, a formalism in the context of the Relativistic Plane Wave Impulse Approximation is developed, in which the interaction matrix is expanded in terms ...
B. D. Serot, B. I. S. van der Ventel, C. Chan, C. J. Horowitz, C. J. Horowitz, D. L. Adams, E. E. van Faassen, E. E. van Faassen, G. C. Hillhouse, G. C. Hillhouse, G. C. Hillhouse, G. C. Hillhouse, J. A. McNiel, J. A. McNiel, J. A. Tjon, J. A. Tjon, J. A. Tjon, J. A. Tjon, J. A. Tjon, J. D. Bjorken, J. Hamilton, P. R. De Kock, R. J. Furnstahl, S. J. Wallace, T. A. Carey   +24 more
core   +2 more sources

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source