Long-lived particle
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A long-lived particle (LLP) is any hypothetical new particle that has a "macroscopic" lifetime, and can e.g. fly a macrocopic distance through a detector before decaying. New particles beyond the standard model might have long lifetimes for several reasons, including approximate symmetries that stabilize the LLP, small couplings between the LLP and lighter states, and suppressed phase space available for decays [1].
Learn more
- Very comprehensive review article [1]
References
- ↑ 1.0 1.1 Juliette Alimena et al.: Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider, J. Phys. G: Nucl. Part. Phys. 47 090501 (2020), (arXiv:1903.04497)
