Search for mirror hidden sector with neutral kaons at NA64

S. N. Gninenko; N. V. Krasnikov

doi:10.1103/btqb-16lt

paper

Search for mirror hidden sector with neutral kaons at NA64

arXiv:2503.22499 · doi:10.1103/btqb-16lt

Abstract

Mirror matter from the dark hidden sector with the same particle content and gauge interactions as in the standard model is still an interesting candidate for dark matter. Several experiments on search for positronium and neutron oscillations into their mirror partner have been conducted recently. In this work we consider the transitions $K^{0} - K_{m}^{0}$ of a neutral kaon into a hidden mirror kaon. It is shown that their probability can be probed with the sensitivity of $P (K^{0} - K_{m}^{0}) ≲ 1 0^{- 7}$ from the search for missing-energy events in the NA64 experiment at the CERN SPS with $\sim 1 0^{11}$ $K^{+}$ on target.This would result in a limit on the $K^{0} - K_{m}^{0}$ mixing parameter much stronger than the similar bound estimated from the cosmological considerations.

arXiv comment6 pages, 1 figure. New section with cosmological constraints is added on the request of the referee. Version published in Phys.Rev. D. arXiv admin note: text overlap with arXiv:1409.2288

Search for mirror hidden sector with neutral kaons at NA64

Abstract

References in corpus (29)