M. Kirsanov
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View article: Proof of principle for a light dark matter search with low-energy positron beams at NA64
Proof of principle for a light dark matter search with low-energy positron beams at NA64 Open
A bstract Thermal light dark matter (LDM) with particle masses in the 1 MeV–1 GeV range could successfully explain the observed dark matter abundance as a relic from the primordial Universe. In this picture, a new feeble interaction acts a…
View article: Proof of principle for a light dark matter search with low-energy positron beams at NA64
Proof of principle for a light dark matter search with low-energy positron beams at NA64 Open
Thermal light dark matter (LDM) with particle masses in the 1 MeV - 1 GeV range could successfully explain the observed dark matter abundance as a relic from the primordial Universe. In this picture, a new feeble interaction acts as a "por…
View article: Shedding light on dark sectors with high-energy muons at the NA64 experiment at the CERN SPS
Shedding light on dark sectors with high-energy muons at the NA64 experiment at the CERN SPS Open
A search for dark sectors is performed using the unique M2 beam line at the CERN Super Proton Synchrotron. New particles (X) could be produced in the bremsstrahlung-like reaction of high-energy 160 GeV positively charged muons impinging on…
View article: Search for Inelastic Boosted Dark Matter with the ICARUS Detector at the Gran Sasso Underground National Laboratory
Search for Inelastic Boosted Dark Matter with the ICARUS Detector at the Gran Sasso Underground National Laboratory Open
We present the result of a search for inelastic boosted dark matter using the data corresponding to an exposure of 0.13 kton$\cdot$year, collected by the ICARUS T-600 detector during its 2012--2013 operational period at the INFN Gran Sasso…
View article: Dark-Sector Search via Pion-Produced <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>η</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:math> Mesons Decaying Invisibly in the NA64h Detector
Dark-Sector Search via Pion-Produced and Mesons Decaying Invisibly in the NA64h Detector Open
We present the first results from a proof-of-concept search for dark sectors via invisible decays of pseudoscalar η and η′ mesons in the NA64h experiment at the CERN SPS. Our novel technique uses the charge-exchange reaction of 50 GeV π− o…
View article: Shedding light on Dark Sectors with high-energy muons at the NA64 experiment at the CERN SPS
Shedding light on Dark Sectors with high-energy muons at the NA64 experiment at the CERN SPS Open
A search for Dark Sectors is performed using the unique M2 beam line at the CERN Super Proton Synchrotron. New particles ($X$) could be produced in the bremsstrahlung-like reaction of high energy 160 GeV muons impinging on an active target…
View article: First Results in the Search for Dark Sectors at NA64 with the CERN SPS High Energy Muon Beam
First Results in the Search for Dark Sectors at NA64 with the CERN SPS High Energy Muon Beam Open
We report the first search for dark sectors performed at the NA64 experiment employing a high energy muon beam and a missing energy-momentum technique. Muons from the M2 beamline at the CERN Super Proton Synchrotron with a momentum of 160 …
View article: First constraints on the $L_μ-L_τ$ explanation of the muon $g-2$ anomaly from NA64-$e$ at CERN
First constraints on the $L_μ-L_τ$ explanation of the muon $g-2$ anomaly from NA64-$e$ at CERN Open
The inclusion of an additional $U(1)$ gauge $L_μ-L_τ$ symmetry would release the tension between the measured and the predicted value of the anomalous muon magnetic moment: this paradigm assumes the existence of a new, light $Z^\prime$ vec…
View article: Probing light dark matter with positron beams at NA64
Probing light dark matter with positron beams at NA64 Open
We present the results of a missing-energy search for light dark matter which has a new interaction with ordinary matter transmitted by a vector boson, called dark photon A′. For the first time, this search is performed with a positron bea…
View article: Search for Dark Matter at NA62 and NA64 experiments
Search for Dark Matter at NA62 and NA64 experiments Open
Searches for Dark Matter with the NA62 and NA64 experiments at CERN are presented. In the NA62 experiment the search is in the decays $A^\\prime \\to \\mu \\mu$ and $A^\\prime \\to e e$, where $A^\\prime$ is a new vector particle correspon…
View article: Exploration of the Muon $g-2$ and Light Dark Matter explanations in NA64 with the CERN SPS high energy muon beam
Exploration of the Muon $g-2$ and Light Dark Matter explanations in NA64 with the CERN SPS high energy muon beam Open
We report on a search for a new $Z'$ ($L_μ-L_τ$) vector boson performed at the NA64 experiment employing a high energy muon beam and a missing energy-momentum technique. Muons from the M2 beamline at the CERN Super Proton Synchrotron with …
View article: Search for Light Dark Matter with NA64 at CERN
Search for Light Dark Matter with NA64 at CERN Open
Thermal dark matter models with particle χ masses below the electroweak scale can provide an explanation for the observed relic dark matter density. This would imply the existence of a new feeble interaction between the dark and ordinary m…
View article: Search for Light Dark Matter with NA64 at CERN
Search for Light Dark Matter with NA64 at CERN Open
Thermal dark matter models with particle $χ$ masses below the electroweak scale can provide an explanation for the observed relic dark matter density. This would imply the existence of a new feeble interaction between the dark and ordinary…
View article: Fully Geant4 compatible package for the simulation of Dark Matter in fixed target experiments
Fully Geant4 compatible package for the simulation of Dark Matter in fixed target experiments Open
A package for the simulation of Dark Matter (DM) particles is presented. It is intended for fixed target experiments. We chose the Geant4 toolkit framework as a standard in order to be compatible with particle tracking programs used in man…
View article: arXiv : Prospects in the search for a new light $Z'$ boson with the NA64$\mu$ experiment at the CERN SPS
arXiv : Prospects in the search for a new light $Z'$ boson with the NA64$\mu$ experiment at the CERN SPS Open
A light $Z'$ vector boson coupled to the second and third lepton generations through $L_{\mu}-L_{\tau}$ current with mass below 200 MeV provides a very viable explanation in terms of new physics to the recently confirmed $(g-2)_\mu$ anomal…
View article: Probing hidden sectors with a muon beam: Total and differential cross sections for vector boson production in muon bremsstrahlung
Probing hidden sectors with a muon beam: Total and differential cross sections for vector boson production in muon bremsstrahlung Open
Vector bosons, such as Dark Photon $A'$ or $Z'$, can couple to muons and be produced in the bremsstrahlung reaction $μ^- + N \rightarrow μ^- + N + A'(Z')$. Their possible subsequent invisible decay can be detected in fixed target experimen…
View article: Improved exclusion limit for light dark matter from $e^+e^-$ annihilation in NA64
Improved exclusion limit for light dark matter from $e^+e^-$ annihilation in NA64 Open
The current most stringent constraints for the existence of sub-GeV dark matter coupling to Standard Model via a massive vector boson $A^\prime$ were set by the NA64 experiment for the mass region $m_{A^\prime}\lesssim 250$ MeV, by analyzi…
View article: Constraints on New Physics in Electron <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>g</mml:mi><mml:mo>−</mml:mo><mml:mn>2</mml:mn></mml:math> from a Search for Invisible Decays of a Scalar, Pseudoscalar, Vector, and Axial Vector
Constraints on New Physics in Electron from a Search for Invisible Decays of a Scalar, Pseudoscalar, Vector, and Axial Vector Open
We performed a search for a new generic X boson, which could be a scalar (S), pseudoscalar (P), vector (V), or an axial vector (A) particle produced in the 100 GeV electron scattering off nuclei, e-Z→e-ZX, followed by its invisible decay i…
View article: Search for pseudoscalar bosons decaying into $e^+e^-$ pairs
Search for pseudoscalar bosons decaying into $e^+e^-$ pairs Open
We report the results of a search for a light pseudoscalar particle $a$ that
couples to electrons and decays to $e^+e^-$ performed using the high-energy
CERN SPS H4 electron beam. If such pseudoscalar with a mass $\simeq 17$ MeV
exists, it…
View article: Probing the explanation of the muon (g-2) anomaly and thermal light dark matter with the semi-visible dark photon channel
Probing the explanation of the muon (g-2) anomaly and thermal light dark matter with the semi-visible dark photon channel Open
We report the results of a search for a new vector boson ($A'$) decaying into\ntwo dark matter particles $\\chi_1 \\chi_2$ of different mass. The heavier\n$\\chi_2$ particle subsequently decays to $\\chi_1$ and $A' \\to e^- e^+$. For a\nsu…
View article: About the relationship between the radii of bubbles in the condesator of the drive wheel of a vibration-pneumatic machine and at the entrance to the nozzle
About the relationship between the radii of bubbles in the condesator of the drive wheel of a vibration-pneumatic machine and at the entrance to the nozzle Open
To increase the efficiency of vibration-pneumatic machines, it is proposed to use the heat generated during the operation of their compressor. The processes of converting the thermal energy of heated water into useful mechanical work are a…
View article: Photoproduction of axionlike particles in the NA64 experiment
Photoproduction of axionlike particles in the NA64 experiment Open
Axion-like particles $a$ (ALPs) that couple to the Standard Model (SM) gauge\nfields could be observed in the high-energy photon scattering $\\gamma N\\to N a$\noff nuclei followed by the $a\\to \\gamma\\gamma$ decay. In the present paper …
View article: Hunting down the X17 boson at the CERN SPS
Hunting down the X17 boson at the CERN SPS Open
Recently, the ATOMKI experiment has reported new evidence for the excess of $e^+ e^-$ events with a mass $\sim$17 MeV in the nuclear transitions of $^4$He, that they previously observed in measurements with $^8$Be. These observations could…
View article: Search for scalar and axionlike particles with the NA64 experiment
Search for scalar and axionlike particles with the NA64 experiment Open
We carried out a model-independent search for light scalar (s) and pseudoscalar axionlike (a) particles that couple to two photons by using the high-energy CERN SPS H4 electron beam. The new particles, if they exist, could be produced thro…
View article: Dark Matter Search in Missing Energy Events with NA64
Dark Matter Search in Missing Energy Events with NA64 Open
A search for sub-GeV dark matter production mediated by a new vector boson A^{'}, called a dark photon, is performed by the NA64 experiment in missing energy events from 100 GeV electron interactions in an active beam dump at the CERN SPS.…
View article: Recent results of the NA64 experiment at the CERN SPS
Recent results of the NA64 experiment at the CERN SPS Open
We report on the results of the search for a new sub-GeV vector boson ( A ’ ) mediated production of Dark Matter ( χ ) in the fixed-target experiment, NA64, at the CERN SPS. The A ’ , called dark photon, could be generated in the reaction …
View article: Search for a Hypothetical 16.7 MeV Gauge Boson and Dark Photons in the NA64 Experiment at CERN
Search for a Hypothetical 16.7 MeV Gauge Boson and Dark Photons in the NA64 Experiment at CERN Open
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 excited ^{8}Be^{*} nucleus decays. Because of its coupling to electrons, the X could b…