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Quantum Chromo Dynamics
(QCD) The widely accepted modern theory
of matter, based on the assumption that quarks are distinguished
by differences in color and are held together (as in hadrons) by
gluons.
Quark
A positively charged particle
2,000 times more massive than an electron that, with neutrons,
forms all nuclear matter; a proton is a hadron and is made up of
three quarks.
Quark-gluon plasma (QGP)
A "soup" of Nature's most basic
particles, loosed from their usual confined state within
hadrons. Thought to have existed a few millionths of a second
after the Big Bang, before matter cooled and organized into
hadrons and atoms. Also thought to exist at the centers of
neutron stars.
Quasar
A faint blue, star-like object
commonly considered to be extremely distant, probably an unusual
nucleus of a galaxy. It has a tendency to flare.
Quantized
A quantity that cannot be divided
into smaller increments forever, for which there exists a
minimum, quantum increment.
Quantum Mechanic
Study of properties of matter
using its wave properties.
Quantum Model of Atom
Atomic model in which only
probability of locating electron is known.
Quantum Number
Integer ratio of energy to its
quantum increment. Quark
Model
Model in which all particles that interact via the strong interaction are
composed of two or three quarks. |
