pion
pion
Definition
pion (pī′än′)
noun
Particle Physics any of three short-lived mesons that may be positive, negative, or neutral: pions have a mass c. 270 times that of an electron and play an important role in the binding forces within the nucleus of an atom
Etymology: pi + (mes)on
pion
Usage Examples
Converse of object
- charge: It is interesting to notice that there is a huge number of events with 2 charged pions, which is impossible.
- observe: However, observing a pion moving at relative speed v the quarks would be seen orbiting at speed v orb.
- produce: Such interactions would typically produce pions and electron-positron pairs.
Adjective modifier
- neutral: The neutral pions convert directly into photons: Positrons These are identical particles to electrons, having the same characteristics.
Modifies a noun
- decay: Two red tracks forming a very small angle are most probably two gammas from a neutral pion decay.
- production: We are also developing and exploiting these strengths for photonuclear reactions leading to charge exchange and pion production.
- correlator: Testing that the pion correlator of an inverter is an example of an integration test.
- track: Brigitte Epp's new parameterisation for pion tracks in DC1 data added to jobOptions.
