Results 51 to 60 of about 222,838 (270)

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

Infinities within graviton scattering amplitudes

, 1995
We present unitarity as a method for determining the infinities present in graviton scattering amplitudes. The infinities are a combination of IR and UV. By understanding the soft singularities we may extract the UV infinities and relate these to counter-
't Hooft G, 't Hooft G, 't Hooft G, Aeppli A, Berends F A, Constanti V, Cutkosky R E, David C Dunbar, DeTollis B, DeWitt B S, Dixon L, Fradkin E S, Fradkin E S, Gastmans R, Goroff M H, Grisaru M T, Gunion J F, Jack I, Melrose D B, Norridge P S, Novaes S F, Paul S Norridge, Siegel W, van Neerven W, van Oldenborgh G J, van Oldenborgh G J, Veltman M, Weinberg S   +27 more
core   +1 more source

Use of $SU(3)$ flavor projection operators to construct baryon-meson scattering amplitudes in the $1/N_c$ expansion [PDF]

, 2023
Ruben Flores-Mendieta, Johann Hernández
openalex   +1 more source

Reduced Muscular Carnosine in Proximal Myotonic Myopathy—A Pilot 1H‐MRS Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Myotonic dystrophy type 2 (proximal myotonic myopathy, PROMM) is a progressive multisystem disorder with muscular symptoms (proximal weakness, pain, myotonia) and systemic manifestations such as diabetes mellitus, cataracts, and cardiac arrhythmias.
Alexander Gussew, Maryam Kargaran, Maik Rothe, Andreas Deistung, Dietrich Stoevesandt, Walter A. Wohlgemuth, David Strube, Thomas Kendzierski, Anna Katharina Kölsch, Maurits Gerhard Abraham Heuschen, Markus Otto, Alexander Mensch   +11 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

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

Two-Loop Helicity Amplitudes for Quark-Gluon Scattering in QCD and Gluino-Gluon Scattering in Supersymmetric Yang-Mills Theory

, 2003
We present the two-loop QCD helicity amplitudes for quark-gluon scattering, and for quark-antiquark annihilation into two gluons. These amplitudes are relevant for next-to-next-to-leading order corrections to (polarized) jet production at hadron ...
A.D. Martin, A.V. Bogdan, Abilio De Freitas, C. Anastasiou, C. Anastasiou, C. Anastasiou, C. Anastasiou, C. Anastasiou, D. de Florian, D.A. Kosower, D.A. Kosower, E.A. Kuraev, E.W.N. Glover, E.W.N. Glover, F. Aversa, F.A. Berends, I. Jack, J. Soffer, J.A.M. Vermaseren, J.C. Collins, K.S. Kölbig, L. Dixon, L. Lewin, L.W. Garland, L.W. Garland, Lance Dixon, M.L. Mangano, M.T. Grisaru, P. Nogueira, R.K. Ellis, S. Alekhin, S. Catani, S. Catani, S. Moch, S. Moch, S. Weinzierl, S.D. Ellis, S.D. Ellis, S.J. Parke, T. Binoth, T. Gehrmann, V. Del Duca, V.A. Smirnov, W.L. van Neerven, W.T. Giele, W.T. Giele, W.T. Giele, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Kunszt, Z. Xu, Zvi Bern   +60 more
core   +2 more sources

X‐Ray Computed Tomography Quantifies Primary Phases and Reveals Crack Morphology in High‐Cycle Fatigue of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
Primary phases and a fatigue crack are studied in a forged blank of an aluminum alloy using synchrotron and laboratory X‐ray computed tomography. To image the crack, the fatigue test is interrupted, and a static tensile load is applied to open the crack.
Jakob Schröder, Ying Han, Tobias Fritsch, Bardia Hejazi, Alexander Ulbricht, Birgit Skrotzki, Giovanni Bruno   +6 more
wiley   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

Analytical amplitudes from numerical solutions of the scattering equations

Journal of High Energy Physics, 2020
The CHY formalism for massless scattering provides a cohesive framework for the computation of scattering amplitudes in a variety of theories. It is especially compelling because it elucidates existing relations among theories which are seemingly ...
Giuseppe De Laurentis
doaj   +1 more source