Search Results - "Gninenko, S N."

Probing hidden leptonic scalar portals using the NA64 experiment at CERN by Ponten, A., Sieber, H., Oberhauser, B. Banto, Crivelli, P., Kirpichnikov, D., Gninenko, S. N., Hösgen, M., Bueno, L. Molina, Mongillo, M., Zhevlakov, A.

“…In this study, we demonstrate the potential of the NA64 experiment at CERN SPS to search for New Physics processes involving e → μ transitions after the…”
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MiniBooNE anomaly and heavy neutrino decay by Gninenko, S N

“…The anomaly in the low-energy distribution of quasielastic neutrino events reported by the MiniBooNE Collaboration is discussed. We show that the observed…”
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The muon anomalous magnetic moment and a new light gauge boson by Gninenko, S.N., Krasnikov, N.V.

“…It is shown that the 2.6 σ discrepancy between the predicted and recently measured value of the anomalous magnetic moment of positive muons could be explained…”
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Search for GeV-Scale Sterile Neutrinos Responsible for Active Neutrino Oscillations and Baryon Asymmetry of the Universe by Gninenko, S. N., Gorbunov, D. S., Shaposhnikov, M. E.

“…Standard Model fails to explain neutrino oscillations, dark matter, and baryon asymmetry of the Universe. All these problems can be solved with three sterile…”
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New limits on radiative sterile neutrino decays from a search for single photons in neutrino interactions by Gninenko, S.N.

“…It has been recently shown that excess events observed by the LSND and MiniBooNE neutrino experiments could be interpreted as a signal from the radiative decay…”
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Search for MeV dark photons in a light-shining-through-walls experiment at CERN by Gninenko, S. N.

“…In addition to gravity, there might be another very weak interaction between the ordinary and dark matter transmitted by U'(1) gauge bosons A' (dark photons)…”
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Search for a Hypothetical 16.7 MeV Gauge Boson and Dark Photons in the NA64 Experiment at CERN by Banerjee, D, Burtsev, V E, Chumakov, A G, Cooke, D, Crivelli, P, Depero, E, Dermenev, A V, Donskov, S V, Dusaev, R R, Enik, T, Charitonidis, N, Feshchenko, A, Frolov, V N, Gardikiotis, A, Gerassimov, S G, Gninenko, S N, Hösgen, M, Jeckel, M, Karneyeu, A E, Kekelidze, G, Ketzer, B, Kirpichnikov, D V, Kirsanov, M M, Konorov, I V, Kovalenko, S G, Kramarenko, V A, Kravchuk, L V, Krasnikov, N V, Kuleshov, S V, Lyubovitskij, V E, Lysan, V, Matveev, V A, Mikhailov, Yu V, Peshekhonov, D V, Polyakov, V A, Radics, B, Rojas, R, Rubbia, A, Samoylenko, V D, Tikhomirov, V O, Tlisov, D A, Toropin, A N, Trifonov, A Yu, Vasilishin, B I, Vasquez Arenas, G, Volkov, P V, Volkov, V, Ulloa, P

“…We report the first results on a direct search for a new 16.7 MeV boson (X) which could explain the anomalous excess of e^{+}e^{-} pairs observed in the…”
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Search for Invisible Decays of Sub-GeV Dark Photons in Missing-Energy Events at the CERN SPS by Banerjee, D, Burtsev, V, Cooke, D, Crivelli, P, Depero, E, Dermenev, A V, Donskov, S V, Dubinin, F, Dusaev, R R, Emmenegger, S, Fabich, A, Frolov, V N, Gardikiotis, A, Gninenko, S N, Hösgen, M, Kachanov, V A, Karneyeu, A E, Ketzer, B, Kirpichnikov, D V, Kirsanov, M M, Kovalenko, S G, Kramarenko, V A, Kravchuk, L V, Krasnikov, N V, Kuleshov, S V, Lyubovitskij, V E, Lysan, V, Matveev, V A, Mikhailov, Yu V, Myalkovskiy, V V, Peshekhonov, V D, Peshekhonov, D V, Petuhov, O, Polyakov, V A, Radics, B, Rubbia, A, Samoylenko, V D, Tikhomirov, V O, Tlisov, D A, Toropin, A N, Trifonov, A Yu, Vasilishin, B, Vasquez Arenas, G, Ulloa, P, Zhukov, K, Zioutas, K

“…We report on a direct search for sub-GeV dark photons (A^{'}), which might be produced in the reaction e^{-}Z→e^{-}ZA^{'} via kinetic mixing with photons by…”
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The SM extensions with additional light scalar singlet, nonrenor-malizable Yukawa interactions and ( g − 2) μ by Gninenko, S.N., Krasnikov, N.V.

“…We consider the SM extension with additional light real singlet scalar, right-handed neutrino and nonrenormalizable Yukawa interaction for the first two…”
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Muon g − 2 and searches for a new leptophobic sub-GeV dark boson in a missing-energy experiment at CERN by Gninenko, S. N., Krasnikov, N. V., Matveev, V. A.

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On Detection of Narrow Angle \!+\!- Pairs From Dark Photon Decays by Dermenev, A. V., Donskov, S. V., Gninenko, S. N., Kuleshov, S. B., Matveev, V. A., Myalkovskiy, V. V., Peshekhonov, V. D., Poliakov, V. A., Savenkov, A. A., Tikhomirov, V. O., Zhukov, I. A.

“…A class of models of a "dark sector" of particles consider new very weak interaction between the ordinary and dark matter transmitted by U'(1) gauge bosons A'…”
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Constraints on sub-GeV hidden sector gauge bosons from a search for heavy neutrino decays by Gninenko, S.N.

“…Several models of dark matter motivate the concept of hidden sectors consisting of SU(3)C×SU(2)L×U(1)Y singlet fields. The interaction between our and hidden…”
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Detection of heavy Majorana neutrinos and right-handed bosons by Gninenko, S. N., Kirsanov, M. M., Krasnikov, N. V., Matveev, V. A.

“…The SU{sub c}(3) - SU{sub L}(2) - SU{sub R}(2) - U(1) left-right (LR) symmetric model explains the origin of the parity violation in weak interactions and…”
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Resolution of puzzles from the LSND, KARMEN, and MiniBooNE experiments by Gninenko, S. N.

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Invisible decay of muonium: Tests of the standard model and searches for new physics by Gninenko, S. N., Krasnikov, N. V., Matveev, V. A.

“…In the Standard Model, there are several canonical examples of pure leptonic processes involving the muon, the electron, and the corresponding neutrinos which…”
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Probing the muon gμ − 2 anomaly, Lμ − Lτ gauge boson and Dark Matter in dark photon experiments by Gninenko, S.N., Krasnikov, N.V.

“…In the Lμ−Lτ model the 3.6 σ discrepancy between the predicted and measured values of the anomalous magnetic moment of positive muons can be explained by the…”
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Can the mirror world explain the ortho-positronium lifetime puzzle? by Foot, R, Gninenko, S.N

“…We suggest that the discrepant lifetime measurements of ortho-positronium can be explained by ortho-positronium oscillations into mirror ortho-positronium…”
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Search for Dark Sector Physics with NA64 by Gninenko, S. N., Krasnikov, N. V., Matveev, V. A.

“…The NA64 experiment consists of two detectors which are planned to be located at the electron (NA64e) and muon (NA64μ) beams of the CERN SPS and start…”
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The electromagnetic calorimeter of the NOMAD experiment by Autiero, D., Baldo-Ceolin, M., Barichello, G., Bianchi-Bonaiti, V., Bobisut, F., Cardini, A., Cattaneo, P.W., Cavasinni, V., Conta, C., Del Prete, T., De Santo, A., Di Lella, L., Ferrari, R., Flaminio, V., Fraternali, M., Gibin, D., Gninenko, S.N., Guglielmi, A., Iacopini, E., Kovzelev, A.V., La Rotonda, L., Lanza, A., Laveder, M., Lazzeroni, C., Livan, M., Mezzetto, M., Orestano, D., Pastore, F., Pennacchio, E., Petti, R., Polesello, G., Renzoni, G., Rimoldi, A., Roda, C., Sconza, A., Sobczynski, C., Valdata-Nappi, M., Vascon, M., Vercesi, V., Visentin, L., Volkov, S.A.

“…A description is given of the NOMAD electromagnetic calorimeter, consisting of 875 lead-glass counters read out by two-stage photomultipliers and a low noise…”
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Probing millicharged particles with NA64 experiment at CERN by Gninenko, S. N, Kirpichnikov, D. V, Krasnikov, N. V

“…Phys. Rev. D 100, 035003 (2019) In this note we estimate the sensitivity of the NA64 experiment to millicharged particles ($\chi$). That experimental facility…”
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