G. Kekelidze

activity

20092026

most citedChallenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR

358 citations · 1.3k across the 34 of their papers we have counts for

collaborators

37 papers

hep-ex2026

Improved limits on a new $Z^{'}$ in $B - L$ scenarios with the NA64 experiment at CERN

The NA64 Collaboration, Yu. M. Andreev, A. Antonov +53

Extensions of the Standard Model featuring an additional $U (1)_{B - L}$ gauge symmetry provide a compelling framework linking the origin of neutrino masses to possible dark matter ca…

hep-ex2026

A search for the dark photon in the OKA experiment

The OKA Collaboration, A. S. Sadovsky, A. P. Filin +35

A search for the massless dark photon in the decay $K^{+} \to π^{+} π^{0} γ$ is performed with the OKA detector exposed to 17.7 GeV/c RF separated secondary beam of the…

hep-ex2025

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

Yu. M. Andreev, A. Antonov, M. A. Ayala Torres +49

Since its approval in 2016, NA64 has pioneered light dark matter (LDM) searches with electron, positron, muon, and hadron beams. The experiment has successfully met its primary obj…

hep-ex2025

High efficiency veto hadron calorimeter in the NA64 experiment at CERN

Yu. M. Andreev, A. Antonov, M. A. Ayala Torres +53

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, th…

hep-ex2025

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

Yu. M. Andreev, A. Antonov, M. A. Ayala Torres +54

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 Univers…

hep-ex2024

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 +54

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…

hep-ex2024

50 GeV $π^{-}$ in, nothing out: a sensitive probe of invisible $η$ and $η^{'}$ decays with NA64h

Yu. M. Andreev, A. Antonov, M. A. Ayala Torres +54

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 n…

hep-ex2024★ 12 cited

Technical Design Report of the Spin Physics Detector at NICA

The SPD Collaboration, V. Abazov, V. Abramov +411

The Spin Physics Detector collaboration proposes to install a universal detector in the second interaction point of the NICA collider under construction (JINR, Dubna) to study the…

hep-ex2024

First constraints on the $L_{μ} - L_{τ}$ explanation of the muon $g - 2$ anomaly from NA64- $e$ at CERN

Yu. M. Andreev, A. Antonov, D. Banerjee +58

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 pa…

hep-ex2024★ 2 cited

Exploration of the Muon $g - 2$ and Light Dark Matter explanations in NA64 with the CERN SPS high energy muon beam

Yu. M. Andreev, D. Banerjee, B. Banto Oberhauser +54

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…

hep-ex2023

Observation of $K^{+} \to π^{+} π^{0} π^{0} γ$ decay

S. N. Filippov, E. N. Gushchin, A. A. Khudyakov +29

The $K^{+} \to π^{+} π^{0} π^{0} γ$ decay is observed by the OKA collaboration. The branching ratio is measured to be $(4.1 \pm 0.9 (s t a t) \pm 0.4 (sy s t)) \times 1 0^{- 6}$ . The branching…

hep-ex2023★ 3 cited

Searches for the light invisible axion-like particle in $K^{+} \to π^{+} π^{0} a$ decay

A. S. Sadovsky, A. P. Filin, S. A. Akimenko +31

A high statistics data sample of the $K^{+}$ decays is recorded by the OKA collaboration. A missing mass analysis is performed to search for a light invisible pseudoscalar axion-li…

hep-ex2023★ 1 cited

Probing Light Dark Matter with positron beams at NA64

Yu. M. Andreev, A. Antonov, D. Banerjee +63

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^\prime…

hep-ex2023

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 +65

In this study, 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 momentum.…

hep-ex2022★ 7 cited

Measurement of T-odd asymmetry in radiative K+ -> pi0 e+ nu gamma decay using OKA detector

A. Yu. Polyarush, S. A. Akimenko, A. V. Artamonov +32

The paper presents a measurement of the T-odd correlation in radiation decay \boldmath $K^{+} \to π^{0} e^{+} ν_{e} γ$ performed on the installation of the 101200 candidate e…

hep-ex2022★ 34 cited

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

Yu. M. Andreev, D. Banerjee, B. Banto-Oberhauser +55

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 NA…

hep-ex2022★ 20 cited

Search for a light muon-philic $Z^{'}$ with the NA64- $e$ experiment at CERN

Yu. M. Andreev, D. Banerjee, B. Banto Oberhauser +58

The extension of Standard Model made by inclusion of additional $U (1)$ gauge $L_{μ} - L_{τ}$ symmetry can explain the difference between the measured and the predicted value of the muon…

physics.ins-det2022★ 121 cited

Status and initial physics performance studies of the MPD experiment at NICA

MPD Collaboration, V. Abgaryan, R. Acevedo Kado +470

The Nuclotron-base Ion Collider fAcility (NICA) is under construction at the Joint Institute for Nuclear Research (JINR), with commissioning of the facility expected in late 2022.…

hep-ex2021★ 54 cited

Improved exclusion limit for light dark matter from $e^{+} e^{-}$ annihilation in NA64

Yu. Andreev, D. Banerjee, J. Bernhard +55

The current most stringent constraints for the existence of sub-GeV dark matter coupling to Standard Model via a massive vector boson $A^{'}$ were set by the NA64 experiment for…

hep-ex2021

Probing the explanation of the muon (g-2) anomaly and thermal light dark matter with the semi-visible dark photon channel

C. Cazzaniga, P. Odagiu, E. Depero +55

We report the results of a search for a new vector boson ( $A^{'}$ ) decaying into two dark matter particles $χ_{1} χ_{2}$ of different mass. The heavier $χ_{2}$ particle subsequently decays…

hep-ex2021★ 27 cited

Search for pseudoscalar bosons decaying into $e^{+} e^{-}$ pairs in the NA64 experiment at the CERN SPS

Yu. M. Andreev, D. Banerjee, J. Bernhard +52

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.…

hep-ex2021★ 42 cited

Constraints on New Physics in the Electron g-2 from a Search for Invisible Decays of a Scalar, Pseudoscalar, Vector, and Axial Vector

Yu. M. Andreev, D. Banerjee, J. Bernhard +49

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 electro…

hep-ex2021★ 42 cited

Conceptual design of the Spin Physics Detector

V. M. Abazov, V. Abramov, L. G. Afanasyev +291

The Spin Physics Detector, a universal facility for studying the nucleon spin structure and other spin-related phenomena with polarized proton and deuteron beams, is proposed to be…

hep-ex2020★ 16 cited

Study of $K^{+} \to π^{0} e^{+} ν γ$ decay with OKA setup

A. Yu. Polyarush, V. A. Duk, S. N. Filippov +34

Results of a study of the $K^{+} \to π^{0} e^{+} ν γ$ decay at OKA setup are presented. More than 32000 events of this decay are observed. The differential spectra over the ph…

Improved limits on a new Z′ in B−L scenarios with the NA64 experiment at CERN

A search for the dark photon in the OKA experiment

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

High efficiency veto hadron calorimeter in the NA64 experiment at CERN

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

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

50 GeV π− in, nothing out: a sensitive probe of invisible η and η′ decays with NA64h

Technical Design Report of the Spin Physics Detector at NICA

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

Exploration of the Muon g−2 and Light Dark Matter explanations in NA64 with the CERN SPS high energy muon beam

Observation of K+→π+π0π0γ decay

Searches for the light invisible axion-like particle in K+→π+π0a decay

Probing Light Dark Matter with positron beams at NA64

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

Measurement of T-odd asymmetry in radiative K+ -> pi0 e+ nu gamma decay using OKA detector

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

Search for a light muon-philic Z′ with the NA64-e experiment at CERN

Status and initial physics performance studies of the MPD experiment at NICA

Improved exclusion limit for light dark matter from e+e− annihilation in NA64

Probing the explanation of the muon (g-2) anomaly and thermal light dark matter with the semi-visible dark photon channel

Search for pseudoscalar bosons decaying into e+e− pairs in the NA64 experiment at the CERN SPS

Constraints on New Physics in the Electron g-2 from a Search for Invisible Decays of a Scalar, Pseudoscalar, Vector, and Axial Vector

Conceptual design of the Spin Physics Detector

Study of K+→π0e+νγ decay with OKA setup

Improved limits on a new $Z^{'}$ in $B - L$ scenarios with the NA64 experiment at CERN

50 GeV $π^{-}$ in, nothing out: a sensitive probe of invisible $η$ and $η^{'}$ decays with NA64h

First constraints on the $L_{μ} - L_{τ}$ explanation of the muon $g - 2$ anomaly from NA64- $e$ at CERN

Exploration of the Muon $g - 2$ and Light Dark Matter explanations in NA64 with the CERN SPS high energy muon beam

Observation of $K^{+} \to π^{+} π^{0} π^{0} γ$ decay

Searches for the light invisible axion-like particle in $K^{+} \to π^{+} π^{0} a$ decay

Measurement of the intrinsic hadronic contamination in the NA64 $- e$ high-purity $e^{+} / e^{-}$ beam at CERN

Search for a light muon-philic $Z^{'}$ with the NA64- $e$ experiment at CERN

Improved exclusion limit for light dark matter from $e^{+} e^{-}$ annihilation in NA64

Search for pseudoscalar bosons decaying into $e^{+} e^{-}$ pairs in the NA64 experiment at the CERN SPS

Study of $K^{+} \to π^{0} e^{+} ν γ$ decay with OKA setup