Neutral particle
In physics, a neutral particle is a particle with no electric charge.
Stable or long-lived neutral particles
Long-lived neutral particles do not decay for a very long time. 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. They decay before they can be detected by a particle detector. They have been observed only indirectly, such as tracks of ionized particles in a particle accelerator. They include:
References
- K. Nakamura et al. (Particle Data Group), JP G 37, 075021 (2010) and 2011 partial update for the 2012 edition
