Results 71 to 80 of about 2,702,849 (300)

Gluon - W-meson scattering via different renormalization schemes [PDF]

, 1999
The one loop gluon - W-meson amplitude is calculated by means of the gauge-invariant generalized Pauli-Villars regularization and with the help of dimensional regularization.
A. A. SLAVNOV, Frolov S. A., M. M. DEMINOV   +2 more
core   +3 more sources

Faster amplitude estimation [PDF]

Quantum Information and Computation, 2020
In this paper, we introduce an efficient algorithm for the quantum amplitude estimation task which is tailored for near-term quantum computers. The quantum amplitude estimation is an important problem which has various applications in fields such as quantum chemistry, machine learning, and finance.
openaire   +2 more sources

Scalar-graviton amplitudes [PDF]

Journal of High Energy Physics, 2019
Abstract Using the CHY-formalism and its extension to a double cover we provide covariant expressions for tree-level amplitudes with two massive scalar legs and an arbitrary number of gravitons in D dimensions. Using unitarity methods, such amplitudes are needed inputs for the computation of post-Newtonian and post-Minkowskian ...
Bjerrum-Bohr, N. E. J., Cristofoli, Andrea, Damgaard, Poul H., Gomez, Humberto   +3 more
openaire   +6 more sources

Diffusion Spectrum Imaging Maps Early Axonal Loss and a Unique Progressive Signal in Neuronal Intranuclear Inclusion Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To delineate specific in vivo white matter pathology in neuronal intranuclear inclusion disease (NIID) using diffusion spectrum imaging (DSI) and define its clinical relevance. Methods DSI was performed on 42 NIID patients and 38 matched controls.
Kaiyan Jiang, Yixiu Pei, Xiaobao Hu, Ying Xiong, Fang Wang, Yanyan Yu, Min Zhu, Dandan Tan, Meihong Zhou, Daojun Hong, Fuqing Zhou   +10 more
wiley   +1 more source

Anti-Series Varactor Network With Improved Linearity Performances in the Presence of Inductive and Capacitive Parasitics

IEEE Access, 2021
This paper proposes a varactor-based circuit technique intended for amplitude and phase control, with improved linearity in the presence of parasitic capacitances and parasitic inductances.
David Berthiaume, Jean-Jacques Laurin, Nicolas G. Constantin   +2 more
doaj   +1 more source

Three-loop critical exponents, amplitude functions, and amplitude ratios from variational perturbation theory

, 2000
We use variational perturbation theory to calculate various universal amplitude ratios above and below T_c in minimally subtracted phi^4-theory with N components in three dimensions.
A. R. Rajantie, A. R. Rajantie, B. Kastening, B. Li, B. Van den Bossche, C. Bagnuls, C. Bagnuls, C. Bagnuls, C. Bervillier, C. Bervillier, C. Bervillier, C. Gutsfeld, D. I. Kazakov, D. J. Wallace, D. J. Wallace, E. Brézin, E. Brézin, E. Brézin, E. Brézin, E. Brézin, F. J. Halfkann, F. J. Wegner, G. A. Baker, G. A. Baker, G. M. Avdeeva, G. Münster, G. Parisi, H. J. Krause, H. J. Krause, H. Kleinert, H. Kleinert, H. Kleinert, H. Kleinert, H. Kleinert, H. Kleinert, H. Kleinert, H. Kleinert, H. Kleinert, H. Kleinert, I. D. Lawrie, I. S. Gradshteyn, J. A. Lipa, J. A. Lipa, J. C. Le Guillou, J. C. Le Guillou, J. C. Le Guillou, J. F. Nicoll, J. S. Kang, J. Zinn-Justin, J. Zinn-Justin, J. Zinn-Justin, K. G. Chetyrkin, K. Wilson, K. Wilson, K. Wilson, M. E. Fisher, M. Strösser, M.-C. Chang, P. C. Hohenberg, R. Guida, R. Guida, R. Schloms, R. Schloms, R. Schloms, S. A. Antonenko, S. A. Larin, S. S. C. Burnett, S. S. C. Burnett, V. Dohm, V. Privman   +69 more
core   +1 more source

A 73‐Year‐Old Man With Several Years of Difficulty Climbing Stairs and Frequent Tripping

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT A 73‐year‐old man presented with progressive weakness and atrophy predominantly affecting the distal finger flexors and quadriceps muscles. Electrophysiological studies demonstrated mixed myogenic and neurogenic features. Muscle MRI showed inflammatory changes, and muscle biopsy revealed granulomatous myositis with histologic features ...
Mehmet Can Sari, Arens Taga, Sonya Ulrike Steele, Ahmet Hoke   +3 more
wiley   +1 more source

QCD factorizations in gamma* gamma* -> rho rho

, 2006
We calculate the lowest order QCD amplitude, i.e. the quark exchange contribution, to the forward production amplitude of a pair of longitudinally polarized $\rho$ mesons in the scattering of two virtual photons $\gamma^*(Q_1) \gamma^*(Q_2) \to \rho^0_L \
Anikin, Anikin, B. Pire, Blümlein, Brodsky, Diehl, Diehl, Diehl, Diehl, Efremov, Enberg, Ji, Ji, L. Szymanowski, Lansberg, Lepage, M. Segond, Mandelstam, Mankiewicz, Müller, Pire, Pire, Pire, Radyushkin, Radyushkin, S. Wallon   +25 more
core   +2 more sources

QCD Processes at the Amplitude Level [PDF]

, 1999
Some of the most difficult theoretical challenges of QCD occur at the interface of the perturbative and nonperturbative regimes. Exclusive and semi-exclusive processes, the diffractive dissociation of hadrons into jets, and hard diffractive processes ...
Brodsky, S. J.
core   +4 more sources

A Prospective Study of Individuals at Risk of Multiple Sclerosis Informs the Design of Primary Prevention Studies

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective In multiple sclerosis, the optimal time for deploying a therapeutic intervention is before the central nervous system is damaged; given the success of trials treating the earliest stage of MS, the radiologically isolated syndrome, developing primary prevention strategies is an important next challenge.
Amy W. Laitinen, Ceren Tozlu, Tina Roostaei, Fatoumata Diallo, Kaho Onomichi, Jiyeon Son, Zongqi Xia, Philip L. De Jager   +7 more
wiley   +1 more source