215 citations · 668 across the 13 of their papers we have counts for
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Charge-exchange reactions with pion and kaon beams in the NA64h experiment at CERN
Sergei N. Gninenko, Sergey Kuleshov, Valery E. Lyubovitskij +1
We discuss a new approach to search for dark sector coupled to quarks in the invisible decays and oscillations of light neutral mesons produced in the charge-exchange (CEX) reactio…
Nonlocal Portal to the Dark Sector
Sergey Kovalenko, Sergey Kuleshov, Valery E. Lyubovitskij +1
We propose a nonlocal realization of the Stueckelberg portal between the Standard Model and Dark Sector, which decouple in the local limit. This implies that the mediator, $U(1)_{D…
Constraints on dark axion portal: missing energy and fermion EDMs
Sergei N. Gninenko, N. V. Krasnikov, Valery E. Lyubovitskij +4
We study a model in which a new interactions between the Standard Model (SM) photon and both the dark photon ( and an ALP () are described by the dark axion portal operato…
Electron-muon conversion in nuclei and rare decays induced by LFV dark photon
Alexey S. Zhevlakov, Sergey Kuleshov, Valery E. Lyubovitskij +1
We study lepton-flavor violation (LFV) effects occurring in the conversion in nuclei and in the rare radiative decays of the and mesons with a specia…
Probing millicharged particles with NA64 and LDMX
Sergei N. Gninenko, N. V. Krasnikov, Sergey Kuleshov +7
Millicharged particles emerge as compelling candidates in numerous theoretically well-motivated extensions of the Standard Model. These hypothetical particles, characterized by an…
Lepton Phenomenology of Stueckelberg Portal to Dark Sector
A. Kachanovich, S. Kovalenko, S. Kuleshov +2
We propose an extension of the Standard Model (SM) with a gauge invariant dark dector connected to the SM via a new portal -- the Stueckelberg portal, arising in the fr…