Search for a feebly interacting particle XX in the decay K^{+}\rightarrow\pi^{+}XK + →π + X
(2021) Journal of High Energy Physics (Print) — Vol. 03, p. 59 (2021)
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- et. al.
- Abstract
- A search for the K+ → π+X decay, where X is a long-lived feebly interacting particle, is performed through an interpretation of the K+ → π+νν¯ analysis of data collected in 2017 by the NA62 experiment at CERN. Two ranges of X masses, 0–110 MeV/c2 and 154–260 MeV/c2 , and lifetimes above 100 ps are considered. The limits set on the branching ratio, BR(K+ → π+X), are competitive with previously reported searches in the first mass range, and improve on current limits in the second mass range by more than an order of magnitude.
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Citations
Cortina Gil, E., Kleimenova, A., Lurkin, N., & et al. (2021). Search for a feebly interacting particle XX in the decay K^{+}\rightarrow\pi^{+}XK + →π + X. Journal of High Energy Physics (Print), 03, 59. https://doi.org/10.1007/JHEP03(2021)058 (Original work published 2021)