975 citations · 8.4k across the 136 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…
Missing energy signatures of inelastic magnetic dipole DM at NA64e
Sergei N. Gninenko, N. V. Krasnikov, I. V. Voronchikhin +1
Some extensions of the Standard Model consider inelastic dark matter (iDM) as an attractive candidate for sub-GeV DM of thermal origin that could be detected at modern accelerators…
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…
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…
Formation of true muonium in the Drell-Yan dimuon production
Sergei N. Gninenko, Sergey Kuleshov, Valery E. Lyubovitskij +1
We suggest a new mechanism for the formation of true muonium (), the QED bound state, due to the Coulomb interaction of muons from pairs generated in th…
Search for mirror hidden sector with neutral kaons at NA64
S. N. Gninenko, N. V. Krasnikov
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…
Search for oscillations and invisible decays into the dark sector at NA64
S. N. Gninenko, N. V. Krasnikov, V. A. Matveev
The decays have never been experimentally tested. In the Standard Model their branching ratios for the decay into two neutrinos are predicted to be extremely small, $Br(K…
Probing leptophobic dark sector with a pseudoscalar portal in the NA64 experiment at CERN
Sergei N. Gninenko, Dmitry V. Kirpichnikov, Nikolai V. Krasnikov +3
We propose the possibility of discovering a light pseudoscalar particle , axion-like particle (ALP), interacting mainly with quarks using the electron and photon scattering reac…
Probing Hidden Leptonic Scalar Portals using the NA64 Experiment at CERN
A. Ponten, H. Sieber, B. Banto Oberhauser +7
In this study, we demonstrate the potential of the NA64 experiment at CERN SPS to search for New Physics processes involving transitions after the collision of 100…
Test of vector portal with dark fermions in the charge-exchange reactions in the NA64 experiment at CERN SPS
Sergei N. Gninenko, Dmitry V. Kirpichnikov, Sergey Kuleshov +2
We consider an experiment to search for dark sector particles in dark photon kinetic mixing model by analyze invisible and semi-invisible decays of neutral mesons , ,…
Probing invisible vector meson decay mode with hadronic beam in the NA64 experiment at SPS/CERN
Alexey S. Zhevlakov, Dmitry V. Kirpichnikov, Sergei N. Gninenko +2
We test a novel idea of using a beam in the fixed-target experiments to search for New Physics in the events with missing energy. Bounds for invisible vector meson decay…
Search for Light Dark Matter with accelerator and direct detection experiments: comparison and complementarity of recent results
S. N. Gninenko, D. V. Kirpichnikov, N. V. Krasnikov
We discuss the most sensitive constraints on Light Dark Matter (LDM) from accelerator experiments NA64 and BaBar and compare it with recent results from direct searches at XENON1T,…
Probing hidden sectors with a muon beam: implication of spin-0 dark matter mediators for muon anomaly and validity of the Weiszäcker-Williams approach
H. Sieber, D. V. Kirpichnikov, I. V. Voronchikhin +6
In addition to vector () type new particles extensively discussed previously, both CP-even () and CP-odd () spin-0 Dark Matter (DM) mediators can couple to muons and be pr…
Passage of millicharged particles in the electron beam-dump: refining constraints from SLACmQ and estimating sensitivity of NA64e
Nataliya Arefyeva, Sergei Gninenko, Dmitry Gorbunov +1
Millicharged particles (MCPs) arise in many well-motivated extensions of the Standard Model and are a popular subject for experimental searches. We investigate attenuation of the M…
Leptonic scalar portal: Origin of muon anomaly and dark matter?
S. N. Gninenko, N. V. Krasnikov
We present a model explaining both the 4.2 muon anomaly and the relic density of dark matter (DM) in which DM interacts with the Standard Model (SM) via a scalar portal b…
Feebly-Interacting Particles:FIPs 2020 Workshop Report
Prateek Agrawal, Martin Bauer, James Beacham +43
With the establishment and maturation of the experimental programs searching for new physics with sizeable couplings at the LHC, there is an increasing interest in the broader part…
Refining constraints from Borexino measurements on a light -boson coupled to - current
Sergei Gninenko, Dmitry Gorbunov
The recent confirmation by FNAL of the muon anomaly gives strong evidence for the possible existence of new physics beyond the Standard Model in the muon sector. Thus it…
Physics potential of the International Axion Observatory (IAXO)
E. Armengaud, D. Attie, S. Basso +88
We review the physics potential of a next generation search for solar axions: the International Axion Observatory (IAXO). Endowed with a sensitivity to discover axion-like particle…
Combined search for light dark matter with electron and muon beams at NA64
S. N. Gninenko, D. V. Kirpichnikov, M. M. Kirsanov +1
We discuss prospects of searching for a dark photon () which serves as mediator between Standard model (SM) particles and light dark matter (LDM) by using the combined results…
Light hidden photon production in high energy collisions
S. Demidov, S. Gninenko, D. Gorbunov
The visible and dark sectors of particle physics can be connected via kinetic mixing between ordinary and hidden photons. If the latter is light its production in high energy colli…
Probing millicharged particles with NA64 experiment at CERN
S. N. Gninenko, D. V. Kirpichnikov, N. V. Krasnikov
In this note we estimate the sensitivity of the NA64 experiment to millicharged particles (). That experimental facility is dedicated to the searching for dark sector particles…
Deep inelastic and conversion in the NA64 experiment at the CERN SPS
Sergei Gninenko, Sergey Kovalenko, Serguei Kuleshov +2
We study the Lepton Flavor Violating (LFV) conversion in Deep Inelastic Scattering (DIS) of electron (muon) on fixed-target nuclei. Our model-independent analysis is based…
Probing the muon g_μ-2 anomaly, L_μ - L_τ gauge boson and Dark Matter in dark photon experiments
S. N. Gninenko, N. V. Krasnikov
In the L_μ - L_τ model the 3.6 discrepancy between the predicted and measured values of the anomalous magnetic moment of positive muons can be explained by the existence of a ne…
The exact tree-level calculation of the dark photon production in high-energy electron scattering at the CERN SPS
S. N. Gninenko, D. V. Kirpichnikov, M. M. Kirsanov +1
Dark photon () that couples to the standard model fermions via the kinetic mixing with photons and serves as a mediator of dark matter production could be observed in the high-…