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crossing symmetry

См. также в других словарях:

  • Crossing symmetry — In quantum field theory, a branch of theoretical physics, crossing symmetry is a symmetry that relates S matrix elements. Interaction processes involving different kinds of particles can be obtained from each other by replacing incoming particles …   Wikipedia

  • Crossing (physics) — Quantum field theory (Feynman diagram) …   Wikipedia

  • Symmetry breaking — in physics describes a phenomenon where (infinitesimally) small fluctuations acting on a system crossing a critical point decide a system s fate, by determining which branch of a bifurcation is taken. For an outside observer unaware of the… …   Wikipedia

  • Symmetry combinations — This article discusses various symmetry combinations.In 2D, mirror image symmetry in combination with n fold rotational symmetry, with the center of rotational symmetry on the line of symmetry, implies mirror image symmetry with respect to lines… …   Wikipedia

  • Spontaneous symmetry breaking — Quantum field theory (Feynman diagram) …   Wikipedia

  • QCD vacuum — The QCD vacuum is the vacuum state of quantum chromodynamics (QCD). It is an example of a non perturbative vacuum state, characterized by many non vanishing condensates such as the gluon condensate or the quark condensate. These condensates… …   Wikipedia

  • Bootstrap model — In physics, the term bootstrap model is used for a class of theories that use very general consistency criteria to determine the form of a quantum theory from some assumptions on the spectrum of particles.In the 1960s and 70s, the ever growing… …   Wikipedia

  • Møller scattering — Feynman diagrams t channel u channel Møller scattering is the name given to electron electron scattering in Quantum Field Theory. The electron interaction that is idealized in Møller scattering forms the th …   Wikipedia

  • Bhabha scattering — Notice that there is a relative sign difference between the two diagrams.quare of matrix elementTo calculate the unpolarized cross section, one must average over the spins of the incoming particles ( s e and s e+ possible values) and sum over the …   Wikipedia

  • Michael Boris Green — (* 22. Mai 1946) ist ein britischer Physiker und ein Pionier der Stringtheorie. Inhaltsverzeichnis 1 Leben 2 Schriften (Auswahl) 3 Auszeichnungen 4 …   Deutsch Wikipedia

  • Western architecture — Introduction       history of Western architecture from prehistoric Mediterranean cultures to the present.       The history of Western architecture is marked by a series of new solutions to structural problems. During the period from the… …   Universalium

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