one-loop Feynman diagram is a connected Feynman diagram with only one cycle (unicyclic). Such a diagram can be obtained from a connected tree diagram...

In theoretical physics, a Feynman diagram is a pictorial representation of the mathematical expressions describing the behavior and interaction of subatomic...

Feynman rules One-loop Feynman diagram Feynman gauge Feynman path integral Feynman parametrization Feynman propagator Feynman slash notation Feynman–Smoluchowski...

quantum field theory, a tadpole is a one-loop Feynman diagram with one external leg, giving a contribution to a one-point correlation function (i.e., the...

the quantum theory, one may compute the quantum corrections to these currents; to first order, these are the one-loop Feynman diagrams. These are famously...

theory that lead to ultraviolet divergence beyond 2-loops (see one-loop Feynman diagram in Feynman diagram). While there has been a proposal relating to observation...

common Feynman diagrams. His first published diagram appeared in Physical Review in 1949. Wilczek, Frank (July 5, 2016). "How Feynman Diagrams Almost...

interpretation many-worlds interpretation Tsirelson's bound Feynman diagram One-loop Feynman diagram Schwinger's quantum action principle Propagator Annihilation...

proceeds via loop diagrams involving heavy quarks, primarily the top quark, and includes both box and triangle topologies. The triangle diagram explicitly...

Feynman parametrization is a technique for evaluating loop integrals which arise from Feynman diagrams with one or more loops. However, it is sometimes...

statistical mechanics, loop integrals are the integrals which appear when evaluating the Feynman diagrams with one or more loops by integrating over the...

diagrams are a class of Feynman diagrams which are important for understanding CP violating processes in the standard model. They refer to one-loop processes...

a Feynman diagram with a chiral fermion running in the loop (a polygon) with n−k external gravitons and k external gauge bosons attached to the loop where...

The one-electron universe postulate, proposed by theoretical physicist John Wheeler in a telephone call to Richard Feynman in the spring of 1940, is the...

same mass (in the Feynman–'t Hooft gauge only, not true for other gauges). In Feynman diagrams, the ghosts appear as closed loops wholly composed of...

technique of Feynman diagrams. In this case, rules for drawing are the following: 801–802  To these rules we must add a further one for closed loops that implies...

of a result comes from Feynman diagrams without loops, and how much comes from the remaining finite parts of loop diagrams. One can exploit this fact to...

mathematics with one cycle One-loop Feynman diagram, a type of pictorial representation in physics A cyclic compound in chemistry with one ring This disambiguation...

particles.: 31  Feynman rules can be used to directly evaluate tree-level diagrams. However, naïve computation of loop diagrams such as the one shown above...

can be inconsistent due to anomalies. This happens when certain one-loop Feynman diagrams cause a quantum mechanical breakdown of the gauge symmetry. The...

functional integration to obtain a Feynman's path integral description of quantum gravity. These structures are employed in loop quantum gravity as a version...

that QCD is renormalizable at one-loop order requires the evaluation of loop integrals, which can be derived from Feynman rules and evaluated using dimensional...

effect) quantum field theory: only Feynman diagrams with at most a single closed loop (see for example one-loop Feynman diagram) are considered, which corresponds...

quantum electrodynamics, Furry's theorem states that if a Feynman diagram consists of a closed loop of fermion lines with an odd number of vertices, its contribution...

terminology that Feynman uses to refer to the law relating magnetic flux to EMF. Feynman, R. P.; Leighton, R. B.; Sands, M. L. (2006). The Feynman Lectures on...

Schwinger commented on Feynman diagrams in the following way, Like the silicon chips of more recent years, the Feynman diagram was bringing computation...

particles can be described by a schematic representation known as a Feynman diagram, in which virtual particles are represented by internal lines. Virtual...

particle to travel from one place to another in a given period of time, or to travel with a certain energy and momentum. In Feynman diagrams, which serve to calculate...

terms of Penrose diagrams. The notation has been studied extensively by Predrag Cvitanović, who used it, along with Feynman's diagrams and other related...

parametrization is a technique for evaluating loop integrals which arise from Feynman diagrams with one or more loops. It is named after Julian Schwinger, who...