from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A semistable meson produced either in a neutral form with a mass 264 times that of an electron and a mean lifetime of 8.4 × 10-17 seconds or in a positively or negatively charged form with a mass 273 times that of an electron and a mean lifetime of 2.6 × 10-8 seconds. Also called pi meson. See Table at subatomic particle.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of three semistable mesons, having positive, negative or neutral charge, composed of up and down quarks/antiquarks.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a meson involved in holding the nucleus together; produced as the result of high-energy particle collision
“The pion is usually pictured as a relatively simple system consisting of one quark and one anti-quark,” Dr. Huber says.
This is known as pion punch-through and gives a fake muon signal.
This means that a diagram with several interactions will give a larger contribution than the naive one with the exchange of only one pion, which is the one though that does gives a rough picture of the scattering of two protons.
If one of the jet's particles strikes the nucleus of a gas atom, the collision can briefly create a particle called a pion, which then rapidly decays into a pair of gamma rays.
Another type of elementary particle produced by the collision, called a pion, can decay into muons, but on average the pions wouldn't undergo this decay until they were, on average, meters from the collision.
Je suis un citoyen gabonais et j'exige des élections dans le strict respect de la constitution de La République!!!! et je dis non à ceux qui appelle la france à se mêler de la politique gabonaise notamment BEN MOUMBAMBA qu'on ne connait pas et qui pourrait être un pion de cette france!
My work on its specific application to particle physics as a mechanism for generation of the nucleon mass and the pion was first published in 1960.
"Please welcome your tied reigning D.C. cham-pion," announces Crane, who has emceed U.S.
Informed by contemporary Japanese design, current offerings include a golden-hued, honeycomb-faced joint, a dual-banded piece whose face is visible through a peephole in a brushed metal shield, and another with brass pieces jutting from its face resembling a steampunk satellite view of a hurricane -- rock it like one, and you'll totally Score-pion.
For example, a positively charged pion decaying to a positively charged muon and a muon neutrino is the mirror process of a negatively charged pion decaying to a negatively charged muon and a muon antineutrino.
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