Neutral particle
In physics, a neutral particle is a particle with no electric charge, such as a neutron. This is not to be confused with a truly neutral particle, a neutral particle that is also identical to its own antiparticle.
Stable or long-lived neutral particles
Long-lived neutral particles provide a challenge in the construction of particle detectors, because they do not interact electromagnetically, except possibly through their magnetic moments. This means that they do not leave tracks of ionized particles or curve in magnetic fields. Examples of such particles include photons,[PDG 1] neutrons,[PDG 2] and neutrinos.[PDG 3]
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:
gollark: If you want to displace it, actually come up with alternatives.
gollark: Machine learning is somewhat bees in some ways, but it can do really cool stuff which is not currently doable with foolish mortal humans explicitly designing algorithms directly.
gollark: Alternatively, go implement GPT-2-grade text generation or something.
gollark: Okay, go implement a working algorithm to, say, identify if something is "dog" or "cat".
gollark: That isn't much use!
See also
References
- K. Nakamura et al. (Particle Data Group), JP G 37, 075021 (2010) and 2011 partial update for the 2012 edition
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