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In particle physics, a pion is any of three subatomic particles:
π0
,
π+
, and
π−
. Each pion consists of a quark and an antiquark and is therefore a meson. Pions are the lightest mesons and, more generally, the lightest hadrons. They are unstable, with the charged pions
π+
and
π−
decaying after a mean lifetime of 26.033 nanoseconds, and the neutral pion
π0
decaying after a much shorter lifetime of 85 attoseconds. Charged pions most often decay into muons and muon neutrinos, while neutral pions generally decay into gamma rays.
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References
- 1 2 3 "Charles Prescott | Array of Contemporary Physicists". aip.org/history. Archived from the original on 2016-05-14. Retrieved 2016-04-20.
- ↑ Prescott, Charles Y. (1966). "Eta meson photoproduction in the region of the third nucleon resonance". theses.library.caltech.edu.
- ↑ Prescott, C.Y.; Atwood, W.B.; Cottrell, R.L.A.; Destaebler, H.; Garwin, E.L.; Gonidec, A.; Miller, R.H.; Rochester, L.S.; Sato, T.; Sherden, D.J.; Sinclair, C.K.; et al. (1978). "Parity non-conservation in inelastic electron scattering". Physics Letters B. 77 (3): 347–352. Bibcode:1978PhLB...77..347P. doi:10.1016/0370-2693(78)90722-0. OSTI 1446939.
- ↑ Joseph, C. L.; Soffer. Jacques (eds.). "Polarized e–e+ Physics in Linear Colliders by C. Y. Prescott". International Symposium on High-energy Physics with Polarized Beams and Polarized Targets, 25 September – 1 October 1980, Lausanne, Switzerland. online pdf of Prescott's talk
- ↑ "Charles Y. Prescott, 1988 W.K.H. Panofsky Prize in Experimental Physics Recipient". American Physical Society.
For his leading role in the direct demonstration of interference between the weak and electromagnetic interaction by the observation of a small parity violation in inelastic scattering of polarized electrons on deutrons. This result confirmed convincingly the unification of the weak and electromagnetic interactions as embodied in the new standard electeoweak theory.
- ↑ APS Physic | DPF | APS Fellowship for 1997
