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Schwartz, Melvin

(Encyclopedia)Schwartz, Melvin, 1932–2006 American physicist, b. New York City, Ph.D. Columbia, 1958. He was on the faculty at Columbia (1958–66, 1991–2000, emeritus 2000–2006) and Stanford (1966–83). Sch...

baryon

(Encyclopedia)baryon bârˈēŏnˌ [key] [Gr.,=heavy], class of elementary particles that includes the proton, the neutron, and a large number of unstable, heavier particles, known as hyperons. From a technical poi...

measurement

(Encyclopedia)measurement, determination of the magnitude of a quantity by comparison with a standard for that quantity. Quantities frequently measured include time, length, area, volume, pressure, mass, force, and...

Kobayashi, Makoto

(Encyclopedia)Kobayashi, Makoto, 1944–, Japanese physicist, Ph.D. Kyoto Univ., 1972. Kobayashi taught at Kyoto Univ. (1972–79) and the National Laboratory of High Energy Physics, Tsukuba, Japan (1979–97). He ...

lepton

(Encyclopedia)lepton lĕpˈtŏnˌ [key] [Gr.,=light (i.e., lightweight)], class of elementary particles that includes the electron and its antiparticle, the muon and its antiparticle, the tau and its antiparticle, ...

Maskawa, Toshihide

(Encyclopedia)Maskawa, Toshihide, 1940–, Japanese physicist, Ph.D. Nagoya Univ., 1967. Maskawa was a research associate at Nagoya Univ. from 1967–70 and then joined the faculty at Kyoto Univ., where he was appo...

proton

(Encyclopedia)proton, elementary particle having a single positive electrical charge and constituting the nucleus of the ordinary hydrogen atom. The positive charge of the nucleus of any atom is due to its protons....

matter

(Encyclopedia)matter, anything that has mass and occupies space. Matter is sometimes called koinomatter (Gr. koinos=common) to distinguish it from antimatter, or matter composed of antiparticles. The atomic th...

nucleon

(Encyclopedia)nucleon, term applying to both the proton and the neutron, the two constituents of atomic nuclei. The nucleon may be considered a single particle, of which the proton and the neutron are two different...

Tarski, Alfred

(Encyclopedia)Tarski, Alfred tärˈskē [key], 1901–83, Polish-American mathematician and philosopher, Ph.D. Univ. of Warsaw, 1924, b. Alfred Teitelbaum, changed his named 1923. He lectured at Warsaw until 1939, ...