In physics, a neutral particle is a particle without an electric charge, such as a neutron.
Stable or long-lived neutral particles
Long-lived neutral particles provide a challenge in the construction of particle detectors, because they do not interact
electromagnetism, except possibly through their
. This means that they do not leave tracks of ionized particles or curve in
. Examples of such particles include
,
,
and
.
Other neutral particles
Other neutral particles are very short-lived and decay before they could be detected even if they were charged. They have been observed only indirectly. They include:
-
-
Dozens of heavy neutral :
See also
-
Neutral particle oscillation
-
Truly neutral particle
-
K. Nakamura et al. (Particle Data Group), JP G 37, 075021 (2010) and 2011 partial update for the 2012 edition
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