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View article: STATUS AND RESULTS OF THE KM3NeT/ARCA EXPERIMENT
STATUS AND RESULTS OF THE KM3NeT/ARCA EXPERIMENT Open
Plenary talk presented at the XXI International Workshop on Neutrino Telescopes - Padova 29 September - 3 October 2025 (https://agenda.infn.it/event/44606/) On behalf of the KM3NeT Collaboration
View article: KM3NeT constraint on Lorentz-violating superluminal neutrino velocity
KM3NeT constraint on Lorentz-violating superluminal neutrino velocity Open
Lorentz invariance is a fundamental symmetry of spacetime and foundational to modern physics. One of its most important consequences is the constancy of the speed of light. This invariance, together with the geometry of spacetime, implies …
View article: Search for an eV-scale sterile neutrino with the first six detection units of KM3NeT/ORCA
Search for an eV-scale sterile neutrino with the first six detection units of KM3NeT/ORCA Open
The existence of an eV-scale sterile neutrino has been proposed to explain several anomalous experimental results obtained over the course of the past 25 years. The first search for such a sterile neutrino conducted with data from KM3NeT/O…
View article: Evaluation of the upgraded 3-inch Hamamatsu photomultiplier for the KM3NeT Neutrino Telescope
Evaluation of the upgraded 3-inch Hamamatsu photomultiplier for the KM3NeT Neutrino Telescope Open
The 3-inch Hamamatsu R14374-02 photomultiplier tube is an improved version of the R12199-02 model and its successor in the construction of the KM3NeT neutrino telescope. A total of 1000 photomultipliers were analysed to assess their dark c…
View article: First searches for dark matter with the KM3NeT neutrino telescopes
First searches for dark matter with the KM3NeT neutrino telescopes Open
Indirect dark matter detection methods are used to observe the products of dark matter annihilations or decays originating from astrophysical objects where large amounts of dark matter are thought to accumulate. With neutrino telescopes, a…
View article: The ultra-high-energy event KM3-230213A within the global neutrino landscape
The ultra-high-energy event KM3-230213A within the global neutrino landscape Open
On February 13th, 2023, the KM3NeT/ARCA telescope detected a neutrino candidate with an estimated energy in the hundreds of PeVs. In this article, the observation of this ultra-high-energy neutrino is discussed in light of null observation…
View article: Study of tau neutrinos and non-unitary neutrino mixing with the first six detection units of KM3NeT/ORCA
Study of tau neutrinos and non-unitary neutrino mixing with the first six detection units of KM3NeT/ORCA Open
Oscillations of atmospheric muon and electron neutrinos produce tau neutrinos with energies in the GeV range, which can be observed by the ORCA detector of the KM3NeT neutrino telescope in the Mediterranean Sea. First measurements with ORC…
View article: Search for non-standard neutrino interactions with the first six detection units of KM3NeT/ORCA
Search for non-standard neutrino interactions with the first six detection units of KM3NeT/ORCA Open
KM3NeT/ORCA is an underwater neutrino telescope under construction in the Mediterranean Sea. Its primary scientific goal is to measure the atmospheric neutrino oscillation parameters and to determine the neutrino mass ordering. ORCA can co…
View article: The KM3NeT online processing for multi-messenger alerts
The KM3NeT online processing for multi-messenger alerts Open
KM3NeT is a deep-sea research infrastructure under construction in the Mediterranean Sea. It consists of two water-Cherenkov neutrino telescopes: ARCA (Italy), designed to identify and study TeV-PeV astrophysical neutrino sources, and ORCA…
View article: KM3NeT Online Multi-Messenger Results
KM3NeT Online Multi-Messenger Results Open
KM3NeT is a Cherenkov-light based neutrino telescope located in the Mediterranean Sea, comprising two detectors ARCA (Sicily, It) and ORCA (Var, Fr). Currently at ∼15% of its total deployment, with completion expected by 2029, it has an en…
View article: Latest multi-messenger results of the KM3NeT real-time analysis framework
Latest multi-messenger results of the KM3NeT real-time analysis framework Open
Multi-messenger astronomy studies transient phenomena by combining the information provided by different cosmic messengers, such as neutrinos, photons, charged particles or gravitational waves. A coincident detection enhances the chances f…
View article: Search for quantum decoherence in neutrino oscillations with six detection units of KM3NeT/ORCA
Search for quantum decoherence in neutrino oscillations with six detection units of KM3NeT/ORCA Open
Neutrinos described as an open quantum system may interact with the environment which introduces stochastic perturbations to their quantum phase. This mechanism leads to a loss of coherence along the propagation of the neutrino $-$ a pheno…
View article: Measurement of neutrino oscillation parameters with the first six detection units of KM3NeT/ORCA
Measurement of neutrino oscillation parameters with the first six detection units of KM3NeT/ORCA Open
KM3NeT/ORCA is a water Cherenkov neutrino detector under construction and anchored at the bottom of the Mediterranean Sea. The detector is designed to study oscillations of atmospheric neutrinos and determine the neutrino mass ordering. Th…
View article: Search for neutrino emission from GRB 221009A using the KM3NeT ARCA and ORCA detectors
Search for neutrino emission from GRB 221009A using the KM3NeT ARCA and ORCA detectors Open
Gamma-ray bursts are promising candidate sources of high-energy astrophysical neutrinos. The recent GRB 221009A event, identified as the brightest gamma-ray burst ever detected, provides a unique opportunity to investigate hadronic emissio…
View article: Constraints on the energy spectrum of the diffuse cosmic neutrino flux from the ANTARES neutrino telescope
Constraints on the energy spectrum of the diffuse cosmic neutrino flux from the ANTARES neutrino telescope Open
High-significance evidences of the existence of a high-energy diffuse flux of cosmic neutrinos have emerged in the last decade from several observations by the IceCube Collaboration. The ANTARES neutrino telescope took data for 15 years in…
View article: Constraints on the energy spectrum of the diffuse cosmic neutrino flux from the ANTARES neutrino telescope
Constraints on the energy spectrum of the diffuse cosmic neutrino flux from the ANTARES neutrino telescope Open
High-significance evidences of the existence of a high-energy diffuse flux of cosmic neutrinos have emerged in the last decade from several observations by the IceCube Collaboration. The ANTARES neutrino telescope took data for 15 years in…
View article: The Power Board of the KM3NeT Digital Optical Module: Design, Upgrade, and Production
The Power Board of the KM3NeT Digital Optical Module: Design, Upgrade, and Production Open
The KM3NeT Collaboration is building an underwater neutrino observatory at the bottom of the Mediterranean Sea, consisting of two neutrino telescopes, both composed of a three-dimensional array of light detectors, known as digital optical …
View article: Acoustic Positioning for Deep Sea Neutrino Telescopes with a System of Piezo Sensors Integrated into Glass Spheres
Acoustic Positioning for Deep Sea Neutrino Telescopes with a System of Piezo Sensors Integrated into Glass Spheres Open
Position calibration in the deep sea is typically done by means of acoustic multilateration using three or more acoustic emitters installed at known positions. Rather than using hydrophones as receivers that are exposed to the ambient pres…
View article: Search for Neutrino Emission from GRB 221009A using the KM3NeT ARCA and ORCA detectors
Search for Neutrino Emission from GRB 221009A using the KM3NeT ARCA and ORCA detectors Open
Gamma-ray bursts are promising candidate sources of high-energy astrophysical neutrinos. The recent GRB 221009A event, identified as the brightest gamma-ray burst ever detected, provides a unique opportunity to investigate hadronic emissio…
View article: Searches for neutrino counterparts of gravitational waves from the LIGO/Virgo third observing run with KM3NeT
Searches for neutrino counterparts of gravitational waves from the LIGO/Virgo third observing run with KM3NeT Open
The KM3NeT neutrino telescope is currently being deployed at two different sites in the Mediterranean Sea. First searches for astrophysical neutrinos have been performed using data taken with the partial detector configuration already in o…
View article: Detection prospects of very and ultra high-energy gamma rays from extended sources with ASTRI, CTA, and LHAASO
Detection prospects of very and ultra high-energy gamma rays from extended sources with ASTRI, CTA, and LHAASO Open
Context. The recent discovery of several ultra high-energy gamma-ray emitters in our Galaxy represents a significant advancement towards the characterisation of its most powerful accelerators. Nonetheless, in order to unambiguously locate …
View article: Searches for Neutrinos in the Direction of Radio-bright Blazars with the ANTARES Telescope
Searches for Neutrinos in the Direction of Radio-bright Blazars with the ANTARES Telescope Open
Active galaxies, especially blazars, are among the most promising extragalactic candidates for high-energy neutrino sources. To date, ANTARES searches included these objects and used GeV–TeV γ -ray flux to select blazars. Here, a statistic…
View article: Results of the follow-up of ANTARES neutrino alerts
Results of the follow-up of ANTARES neutrino alerts Open
High-energy neutrinos could be produced in the interaction of charged cosmic rays with matter or radiation surrounding astrophysical sources. To look for transient sources associated with neutrino emission, a follow-up program of neutrino …
View article: KM3NeT real-time analysis framework
KM3NeT real-time analysis framework Open
Track: Astrophysical neutrinos