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Particles and Quantum
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Created by
Theo Kitching
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Leptons
are
fundamental
particles and include the
electron
,
muon
(a heavy electron), and
neutrino
(no charge)
Leptons
have an
electron number
of
one
, while their
antiparticle
equivalents have an
electron number
of
minus one
Neutrinos
can be specifically
electron neutrinos
or
muon neutrinos
Hadrons
are split into
Barons
(made of
three quarks
) and
mesons
(made of
two quarks
, a
quark-antiquark pair
)
The three flavors of quark are
up
,
down
, and
strange
Up quarks have a charge of plus
2/3
, down and strange quarks have a charge of minus
1/3
Strange quarks have strangeness
minus
one, antistrange quarks have strangeness
plus
one
Barons have a baron number of plus a
third
, which can be one or minus one if
antiquarks
are present
Neutrons
are
up-down-down
,
protons
are
up-up-down
Mesons that don't have strangeness are
pions
, while mesons with strangeness are
kaons
The
electromagnetic force
can affect any
charged
particle, with the exchange particle being the
photon
The
weak force
can affect any
particle
, with the
exchange particles
being the
W+
,
W-
, or
Z0 boson
The
strong nuclear force
only affects
hadrons
, with the
exchange particle
being the
pion
or
gluon
The
strong
force holds
nuclei
together
In any interaction,
charge
,
baryon number
, and
lepton
numbers must be
conserved
Radiation
includes
particles
or
waves
emitted by something
Gamma
radiation is emitted by the
nucleus
of an atom and can
ionize
atoms
Alpha radiation
involves the emission of an alpha particle (
two protons
and
two neutrons
) during
decay
Beta decay
involves a
neutron
turning into a
proton
and an
electron
, with the
emission
of a
beta particle
(
fast-moving
electron)
Pair production
occurs when a
photon
converts into
two
particles if it has enough
energy
Particles have
wave-particle
duality, demonstrated by
electron diffraction
The
wavelength
of a particle is given by
the de Broglie
wavelength equation:
Lambda
= h /
p
Intensity varies
with
distance
from the
center
in
diffraction patterns
Kinetic energy can be converted into
momentum
using the equation:
KE
=
0.5 * p^2