نتایج جستجو برای: relativistic scattering theory

تعداد نتایج: 904090  

Journal: :سیاست 0
عبدالرحمن عالم دانشگاه تهران حمید یحیوی دانشگاه تهران

this essay intends to show critical abilities of m. foucault's thought. it purposes that assertion to structural and relativistic narratives of foucault's thought, and interpration of it on heidegger, prevents to see critical aspects and critical thought project of foucault. the essay argues that in regard to critical thought, and out of limits of previous critical theory, foucault, w...

1999
Takaomi Shigehara Hiroshi Mizoguchi Taketoshi Mishima Taksu Cheon

We first give the solution for the local approximation of a four parameter family of generalized one-dimensional point interactions within the framework of non-relativistic model with three neighboring δ functions. We also discuss the problem within relativistic (Dirac) framework and give the solution for a three parameter family. It gives a physical interpretation for so-called ε potential. It...

Journal: :Communications in Mathematical Physics 2022

We consider the dynamics of Bose–Hubbard model on general lattices and prove a Lieb–Robinson bound for observables whose supports are separated by an initially almost particle-free region. further obtain maximal velocity particle transport through empty region which also applies to long-range hopping. Our techniques originate in proofs bounds Schrödinger operators scattering theory non-relativi...

2008
Guy Pelletier Martin Lemoine Alexandre Marcowith

After a successful development of theoretical and numerical works on Fermi acceleration at relativistic shocks, some difficulties recently raised with the scattering issue, a crucial aspect of the process. Most pioneering works were developed assuming the scattering off magnetic fluctuations as given. Even in that case, when a mean field is considered, its orientation is mostly perpendicular to...

2005
Dan Censor

Scattering by pulsating objects is discussed. In the case of the pulsating cylinder, its surface vibrates time-harmonically in the radial direction. The formalism is based on first-order / v c relativistic approximations, and on the assumption that the ambient media are not affected by the mechanical motion of the interface. This is conducive to simpler and amenable approximations. The cases an...

2007
S. JESCHONNEK T. W. DONNELLY

For a quantitative description of exclusive electron scattering data at high energies, one has to take into account both relativistic effects and an appropriate description of final state interactions. In the rst part, we use a recent approach for the relativistic treatment of the electromagnetic current operator which does not involve an approximation in the transferred energy or transferred m...

2008
Juan M. Romero J. David Vergara

Using the parametrized relativistic particle we obtain the noncommutative Snyder space-time. In addition, we study the consistency conditions between the boundary conditions and the canonical gauges that give origin to noncommutative theories. Using these results we construct a first order action, in the reduced phase-space, for the Snyder particle with momenta fixed on the boundary. Pacs: 11.1...

1997
C. Alexandrou

Nonperturbative polaron variational methods are applied, within the so-called particle or worldline representation of relativistic field theory, to study scattering in the context of the scalar Wick Cutkosky model. Important features of the variational calculation are that it is a controlled approximation scheme valid for arbitrary coupling strengths, the Green functions have all the cuts and p...

Journal: :Annals of Physics 2021

Continuing our earlier work on the application of Relativistic Generalized Uncertainty Principle (RGUP) to quantum field theories, in this paper we study Quantum Electrodynamics (QED) with minimum length. We obtain expressions for Lagrangian, Feynman rules and scattering amplitudes theory, discuss their consequences current future high energy physics experiments. hope will provide an improved w...

2005
K. Vantournhout N. Jachowicz J. Ryckebusch

We study neutrino interactions in a hadron gas within a relativistic framework. The hadron matter is described by a non-interacting Fermi gas in beta equilibrium. We show that the introduction of relativistic effects causes a sizable enhancement of the neutrino-scattering cross sections. Neutrino interactions are pivotal in the dynamics of core-collapse supernova explosions and in the cooling o...

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