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Individual particle physics events are modeled by scattering theory based on an underlying quantum field theory of the particles and their interactions. The S-matrix is used to characterize the probability of various event outgoing particle states given the incoming particle states.
An event in the universe is caused by the set of events in its causal past. An event contributes to the occurrence of events in its causal future. Upon choosing a frame of reference, one can assign coordinates to the event: three spatial coordinates x → = ( x , y , z ) {\displaystyle {\vec {x}}=(x,y,z)} to describe the location and one time ...
In astrophysics, an event horizon is a boundary beyond which events cannot affect an outside observer. Wolfgang Rindler coined the term in the 1950s. [1]In 1784, John Michell proposed that gravity can be strong enough in the vicinity of massive compact objects that even light cannot escape. [2]
Event (UML), in Unified Modeling Language, a notable occurrence at a particular point in time; Event (particle physics), refers to the results just after a fundamental interaction took place between subatomic particles; Event horizon, a boundary in spacetime, typically surrounding a black hole, beyond which events cannot affect an exterior observer
An event in 7176 BCE may have exceeded even the 774–775 event based on this proxy data. [36] Whether the physics of solar flares is similar to that of even larger superflares is still unclear. The Sun may differ in important ways such as size and speed of rotation from the types of stars that are known to produce superflares. [34]
Event B is simultaneous with A in the green reference frame, but it occurred before in the blue frame, and will occur later in the red frame. Events A, B, and C occur in different order depending on the motion of the observer. The white line represents a plane of simultaneity being moved from the past to the future.
The Ellis–Karliner angle is the kinematic angle between the highest energy jets in a three-jet event. [2] The angle is not measured in the lab frame, but in a frame boosted along the energy of the highest energy jet so that the second and third jets are back-to-back.
Causality is the relationship between causes and effects. [1] [2] While causality is also a topic studied from the perspectives of philosophy and physics, it is operationalized so that causes of an event must be in the past light cone of the event and ultimately reducible to fundamental interactions.