D. Shchukin

Searching for Light Dark Matter and Dark Sectors with the NA64 experiment at the CERN SPS

Yu. M. Andreev, A. Antonov, M. Ayala-Torres, D. Banerjee et autres

Since its approval in 2016, NA64 has pioneered Light Dark Matter (LDM) searches with electron [1], positron [2], muon [3], and hadron [4] beams. The experiment has successfully met its primary objectives, as outlined in the EPPS input (2018), and even exceed …

ch, it, us, ca, ru, de, es, cl (code pays fourni par la source)

Proof of principle for a light dark matter search with low-energy positron beams at NA64

Yu. M. Andreev, А. Антонов, M. Ayala-Torres, D. Banerjee et autres

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 as a “portal” …

it, cl, br, ch, de, ec, es, ca (code pays fourni par la source)

High efficiency veto hadron calorimeter in the NA64 experiment at CERN

Yu. M. Andreev, A. Antonov, M. Ayala-Torres, D. Banerjee et autres

NA64 is a fixed-target experiment at the CERN SPS designed to search for Light particle Dark Matter (LDM) candidates with masses in the sub-GeV range. During the 2016-2022 runs, the experiment obtained the world-leading constraints, leaving however part of the well-motivated region …

Proof of principle for a light dark matter search with low-energy positron beams at NA64

Yu. M. Andreev, А. Антонов, D. Banerjee, B. Banto Oberhauser et autres

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 "portal" …

Shedding light on dark sectors with high-energy muons at the NA64 experiment at the CERN SPS

Yu. M. Andreev, D. Banerjee, B. Banto Oberhauser, J. Bernhard et autres

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 an active …

ch, it, gr, cl, de, fr, br, ec, es, ca (code pays fourni par la source)

Dark-Sector Search via Pion-Produced η and η ′ Mesons Decaying Invisibly in the NA64h Detector

Yu. M. Andreev, A. Antonov, M. Ayala-Torres, D. Banerjee et autres

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^{-} on nuclei …

ch, cl, br, ca, it, gb, de, ec, es (code pays fourni par la source)

Shedding light on Dark Sectors with high-energy muons at the NA64 experiment at the CERN SPS

Yu. M. Andreev, D. Banerjee, B. Banto Oberhauser, J. Bernhard et autres

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, $μN\rightarrowμNX$, followed …

First constraints on the Lμ − Lτ explanation of the muon g-2 anomaly from NA64-e at CERN

Yu. M. Andreev, A. Antonov, D. Banerjee, B. Banto Oberhauser et autres

A bstract 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 …

it, ch, ca, gb, cl, gr, de, br, ec, es (code pays fourni par la source)

First Results in the Search for Dark Sectors at NA64 with the CERN SPS High Energy Muon Beam

Yu. M. Andreev, D. Banerjee, B. Banto Oberhauser, J. Bernhard et autres

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 GeV/c are …

ch, it, gr, cl, de, es, ca (code pays fourni par la source)

Probing light dark matter with positron beams at NA64

Yu. M. Andreev, A. Antonov, D. Banerjee, B. Banto Oberhauser et autres

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 beam …

ch, it, gb, gr, de, cl, es, ca (code pays fourni par la source)

Measurement of the intrinsic hadronic contamination in the NA64 −e high-purity e+/e− beam at CERN

Yu. M. Andreev, D. Banerjee, B. Banto Oberhauser, J. Bernhard et autres

We present the measurement of the intrinsic hadronic contamination at the CERN SPS H4 beamline configured to transport electrons and positrons at 100 GeV/c. The analysis, performed using data collected by the NA64-e experiment in 2022, is based on calorimetric measurements, exploiting …

ch, it, gb, gr, de, cl, ca, es (code pays fourni par la source)

Search for a New B-L Z' Gauge Boson with the NA64 Experiment at CERN

Yu. M. Andreev, D. Banerjee, B. Banto-Oberhauser, J. Bernhard et autres

A search for a new $Z'$ gauge boson associated with (un)broken B-L symmetry in the keV-GeV mass range is carried out for the first time using the missing-energy technique in the NA64 experiment at the CERN SPS. From the analysis of the …