Ponències/Comunicacions de congressos
http://hdl.handle.net/2117/103469
2024-03-28T16:52:15Z
2024-03-28T16:52:15Z
ANTARES search for neutrino flares from the direction of radio-bright blazars
Alves Garre, Sergio
André, Michel
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Belhorma, Bouchra
Bendahman, Meriem
Bertin, Vincent
Bissinger, Matthias
Boumaaza, Jihad
http://hdl.handle.net/2117/385732
2023-03-29T12:41:44Z
2023-03-29T12:31:25Z
ANTARES search for neutrino flares from the direction of radio-bright blazars
Alves Garre, Sergio; André, Michel; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, J.; Belhorma, Bouchra; Bendahman, Meriem; Bertin, Vincent; Bissinger, Matthias; Boumaaza, Jihad
In 2017, a high-energy muon neutrino detected by IceCube was found positionally coincident with the direction of a known blazar, TXS 0506+056, in a state of enhanced 훾-ray emission. Soon after, IceCube reported a compelling evidence for an earlier neutrino flare from the same direction found in the archival data, this time not accompanied by any observed electromagnetic activity. The IceCube findings suggest searching for flaring neutrino emissions from astrophysical sources, not necessarily accompanied by flares detected in y-rays. The analysis presented in this contribution scans the events collected by the ANTARES neutrino telescope in 13 years of data taking in a search for clustering in space and time. The analysis method is based on an unbinned maximum likelihood approach. Generic Gaussian and Box profiles are assumed for the signal time emission, with both the central time and duration of the flare being free parameters in the likelihood maximization. The time-dependent approach is applied to the catalog of radio-bright blazars for which a promising directional correlation with IceCube muon tracks was recently reported [ApJ 894 (2020) 101, ApJ 908 (2021) 157].
2023-03-29T12:31:25Z
Alves Garre, Sergio
André, Michel
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Belhorma, Bouchra
Bendahman, Meriem
Bertin, Vincent
Bissinger, Matthias
Boumaaza, Jihad
In 2017, a high-energy muon neutrino detected by IceCube was found positionally coincident with the direction of a known blazar, TXS 0506+056, in a state of enhanced 훾-ray emission. Soon after, IceCube reported a compelling evidence for an earlier neutrino flare from the same direction found in the archival data, this time not accompanied by any observed electromagnetic activity. The IceCube findings suggest searching for flaring neutrino emissions from astrophysical sources, not necessarily accompanied by flares detected in y-rays. The analysis presented in this contribution scans the events collected by the ANTARES neutrino telescope in 13 years of data taking in a search for clustering in space and time. The analysis method is based on an unbinned maximum likelihood approach. Generic Gaussian and Box profiles are assumed for the signal time emission, with both the central time and duration of the flare being free parameters in the likelihood maximization. The time-dependent approach is applied to the catalog of radio-bright blazars for which a promising directional correlation with IceCube muon tracks was recently reported [ApJ 894 (2020) 101, ApJ 908 (2021) 157].
High-energy reconstruction for single and double cascades using the KM3NeT detector
Ageron, M.
Aiello, S
Alshamsi, Mohammed
Ambrosone, Antonio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Bagatelas, Christos
http://hdl.handle.net/2117/385731
2023-03-29T12:20:21Z
2023-03-29T12:18:10Z
High-energy reconstruction for single and double cascades using the KM3NeT detector
Ageron, M.; Aiello, S; Alshamsi, Mohammed; Ambrosone, Antonio; André, Michel; Androulakis, Giorgos; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, J.; Bagatelas, Christos
The discovery of a high-energy cosmic neutrino flux has paved the way for the field of neutrino astronomy. For a large part of the flux, the sources remain unidentified. The KM3NeT detector, which is under construction in the Mediterranean sea, is designed to determine their origin. KM3NeT will instrument a cubic kilometre of seawater with photomultiplier tubes that detect Cherenkov radiation from neutrino interaction products with nanosecond precision. For single cascade event signatures, KM3NeT already showed that it can reach degree-level resolutions, greatly increasing the use of these neutrinos for astronomy. In this contribution, we further refine the cascade reconstruction by making a more detailed model of the neutrinos events and including additional information on the hit times. The arrival time of light can be used to improve the identification of double cascade signatures from tau neutrinos, and the angular resolution of both single and double cascade signatures. Sub-degree resolution is achieved in both cases. © Copyright owned by the author(s).
2023-03-29T12:18:10Z
Ageron, M.
Aiello, S
Alshamsi, Mohammed
Ambrosone, Antonio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Bagatelas, Christos
The discovery of a high-energy cosmic neutrino flux has paved the way for the field of neutrino astronomy. For a large part of the flux, the sources remain unidentified. The KM3NeT detector, which is under construction in the Mediterranean sea, is designed to determine their origin. KM3NeT will instrument a cubic kilometre of seawater with photomultiplier tubes that detect Cherenkov radiation from neutrino interaction products with nanosecond precision. For single cascade event signatures, KM3NeT already showed that it can reach degree-level resolutions, greatly increasing the use of these neutrinos for astronomy. In this contribution, we further refine the cascade reconstruction by making a more detailed model of the neutrinos events and including additional information on the hit times. The arrival time of light can be used to improve the identification of double cascade signatures from tau neutrinos, and the angular resolution of both single and double cascade signatures. Sub-degree resolution is achieved in both cases. © Copyright owned by the author(s).
Muon bundle reconstruction with KM3NeT/ORCA using graph convolutional networks
Ageron, M.
Aiello, S
Albert, Arthur
Alshamsi, Mohammed
Ambrosone, Antonio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Bagatelas, Christos
http://hdl.handle.net/2117/385730
2023-03-29T12:10:55Z
2023-03-29T12:09:37Z
Muon bundle reconstruction with KM3NeT/ORCA using graph convolutional networks
Ageron, M.; Aiello, S; Albert, Arthur; Alshamsi, Mohammed; Ambrosone, Antonio; André, Michel; Androulakis, Giorgos; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, J.; Bagatelas, Christos
KM3NeT/ORCA is a water-Cherenkov neutrino detector, currently under construction in the Mediterranean Sea at a depth of 2450 meters. The project’s main goal is the determination of the neutrino mass hierarchy by measuring the energy- and zenith-angle-resolved oscillation probabilities of atmospheric neutrinos traversing the Earth. Additionally, the detector observes a large amount of atmospheric muons, which can be used to study extensive air showers generated by cosmic ray particles. This work describes a deep-learning based reconstruction of atmospheric muons using graph convolutional networks. They are used to reconstruct the zenith angle, the muon multiplicity and the diameter of atmospheric muon bundles. Simulations and measured data from an early four line stage of the detector are used to evaluate the performance. Furthermore, the reconstructions are compared to the ones of classical approaches, and use cases for the indirect study of cosmic ray particles are shown.
2023-03-29T12:09:37Z
Ageron, M.
Aiello, S
Albert, Arthur
Alshamsi, Mohammed
Ambrosone, Antonio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Bagatelas, Christos
KM3NeT/ORCA is a water-Cherenkov neutrino detector, currently under construction in the Mediterranean Sea at a depth of 2450 meters. The project’s main goal is the determination of the neutrino mass hierarchy by measuring the energy- and zenith-angle-resolved oscillation probabilities of atmospheric neutrinos traversing the Earth. Additionally, the detector observes a large amount of atmospheric muons, which can be used to study extensive air showers generated by cosmic ray particles. This work describes a deep-learning based reconstruction of atmospheric muons using graph convolutional networks. They are used to reconstruct the zenith angle, the muon multiplicity and the diameter of atmospheric muon bundles. Simulations and measured data from an early four line stage of the detector are used to evaluate the performance. Furthermore, the reconstructions are compared to the ones of classical approaches, and use cases for the indirect study of cosmic ray particles are shown.
Comparison of the measured atmospheric muon rate with Monte Carlo simulations and sensitivity study for detection of prompt atmospheric muons with KM3NeT
Ageron, M.
Aiello, S
Albert, Arthur
Alshamsi, Mohammed
Ambrosone, Antonio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Bagatelas, Christos
http://hdl.handle.net/2117/385727
2023-03-29T12:00:22Z
2023-03-29T11:57:29Z
Comparison of the measured atmospheric muon rate with Monte Carlo simulations and sensitivity study for detection of prompt atmospheric muons with KM3NeT
Ageron, M.; Aiello, S; Albert, Arthur; Alshamsi, Mohammed; Ambrosone, Antonio; André, Michel; Androulakis, Giorgos; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, J.; Bagatelas, Christos
The KM3NeT Collaboration has successfully deployed the first detection units of the next generation undersea neutrino telescopes in the Mediterranean Sea at the two sites in Italy and in France. The data sample collected between December 2016 and January 2020 has been used to measure the atmospheric muon rate at two different depths under the sea level: 3.5 km with KM3NeTARCA and 2.5 km with KM3NeT-ORCA. Atmospheric muons represent an abundant signal in a neutrino telescope and can be used to test the reliability of the Monte Carlo simulation chain and to study the physics of extensive air showers caused by highly-energetic primary nuclei impinging the Earth’s atmosphere. At energies above PeV the contribution from prompt muons, created right after the first interaction in the shower, is expected to become dominant, however its existence has not yet been experimentally confirmed. In this talk, data collected with the first detection units of KM3NeT are compared to Monte Carlo simulations based on MUPAGE and CORSIKA codes. The main features of the simulation and reconstruction chains are presented. Additionally, the first results of the simulated signal from the prompt muon component for KM3NeT-ARCA and KM3NeT-ORCA obtained with CORSIKA are discussed.
2023-03-29T11:57:29Z
Ageron, M.
Aiello, S
Albert, Arthur
Alshamsi, Mohammed
Ambrosone, Antonio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Bagatelas, Christos
The KM3NeT Collaboration has successfully deployed the first detection units of the next generation undersea neutrino telescopes in the Mediterranean Sea at the two sites in Italy and in France. The data sample collected between December 2016 and January 2020 has been used to measure the atmospheric muon rate at two different depths under the sea level: 3.5 km with KM3NeTARCA and 2.5 km with KM3NeT-ORCA. Atmospheric muons represent an abundant signal in a neutrino telescope and can be used to test the reliability of the Monte Carlo simulation chain and to study the physics of extensive air showers caused by highly-energetic primary nuclei impinging the Earth’s atmosphere. At energies above PeV the contribution from prompt muons, created right after the first interaction in the shower, is expected to become dominant, however its existence has not yet been experimentally confirmed. In this talk, data collected with the first detection units of KM3NeT are compared to Monte Carlo simulations based on MUPAGE and CORSIKA codes. The main features of the simulation and reconstruction chains are presented. Additionally, the first results of the simulated signal from the prompt muon component for KM3NeT-ARCA and KM3NeT-ORCA obtained with CORSIKA are discussed.
KM3NeT Detection Unit Line Fit reconstruction using positioning sensors data
Ageron, M.
Aiello, S
Alshamsi, Mohammed
Ambrosone, Antonio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Bagatelas, Christos
http://hdl.handle.net/2117/385725
2023-03-29T11:50:14Z
2023-03-29T11:46:21Z
KM3NeT Detection Unit Line Fit reconstruction using positioning sensors data
Ageron, M.; Aiello, S; Alshamsi, Mohammed; Ambrosone, Antonio; André, Michel; Androulakis, Giorgos; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, J.; Bagatelas, Christos
The KM3NeT collaboration is constructing two large neutrino detectors in the Mediterranean Sea: KM3NeT/ARCA, located near Sicily and aiming at neutrino astronomy, and KM3NeT/ORCA, located near Toulon and designed for neutrino oscillation studies. The two detectors, together, will have hundreds of Detection Units (DUs) with 18 Digital Optical Modules (DOMs) maintained vertical by buoyancy, forming a large 3D optical array for detecting the Cherenkov light produced by particle produced in neutrino interactions. To properly reconstruct the direction of the incoming neutrino, the position of the DOMs must be known precisely with an accuracy of less than 10 cm, and since the DUs are affected by sea current the position will be measured every 10 minutes. For this purpose, there are acoustic and orientation sensors inside the DOMs. An Attitude Heading Reference System (AHRS) chip provides the components values of the Acceleration and Magnetic field in the DOM, from which it is possible to calculate Yaw, Pitch, and Roll for each floor of the line. A piezo sensor detects the signals from fixed acoustic emitters on the sea floor, so to position it by trilateration. Data from these sensors are used as an input to reconstruct the shape of the entire line based on a DU Line Fit mechanical model. This proceeding presents an overview of the KM3NeT monitoring system, as well as the line fit model and its results.
2023-03-29T11:46:21Z
Ageron, M.
Aiello, S
Alshamsi, Mohammed
Ambrosone, Antonio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Bagatelas, Christos
The KM3NeT collaboration is constructing two large neutrino detectors in the Mediterranean Sea: KM3NeT/ARCA, located near Sicily and aiming at neutrino astronomy, and KM3NeT/ORCA, located near Toulon and designed for neutrino oscillation studies. The two detectors, together, will have hundreds of Detection Units (DUs) with 18 Digital Optical Modules (DOMs) maintained vertical by buoyancy, forming a large 3D optical array for detecting the Cherenkov light produced by particle produced in neutrino interactions. To properly reconstruct the direction of the incoming neutrino, the position of the DOMs must be known precisely with an accuracy of less than 10 cm, and since the DUs are affected by sea current the position will be measured every 10 minutes. For this purpose, there are acoustic and orientation sensors inside the DOMs. An Attitude Heading Reference System (AHRS) chip provides the components values of the Acceleration and Magnetic field in the DOM, from which it is possible to calculate Yaw, Pitch, and Roll for each floor of the line. A piezo sensor detects the signals from fixed acoustic emitters on the sea floor, so to position it by trilateration. Data from these sensors are used as an input to reconstruct the shape of the entire line based on a DU Line Fit mechanical model. This proceeding presents an overview of the KM3NeT monitoring system, as well as the line fit model and its results.
Atmospheric neutrinos with the first detection units of KM3NeT/ARCA
Coniglione, R.
Markou, Christos
Müller, R R
Tzamariudaki, Ekaterini
Ageron, M.
Aiello, S
Albert, Arthur
Alshamsi, Mohammed
Alves Garre, Sergio
Aly, Zineb
Ambrosone, Antonio
Ameli, Fabrizio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
http://hdl.handle.net/2117/385643
2023-03-28T18:20:22Z
2023-03-28T18:12:05Z
Atmospheric neutrinos with the first detection units of KM3NeT/ARCA
Coniglione, R.; Markou, Christos; Müller, R R; Tzamariudaki, Ekaterini; Ageron, M.; Aiello, S; Albert, Arthur; Alshamsi, Mohammed; Alves Garre, Sergio; Aly, Zineb; Ambrosone, Antonio; Ameli, Fabrizio; André, Michel; Androulakis, Giorgos; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel
The KM3NeT Collaboration is constructing two deep-sea Cherenkov detectors in the Mediterranean Sea, aiming at neutrino oscillation measurements with the ORCA array, while the ARCA array aims at neutrino astronomy in the TeV range. In April 2021, 5 additional detection units were deployed in the ARCA site. The KM3NeT/ARCA instrumented volume is currently similar to the one of the ANTARES neutrino telescope. In this contribution, an analysis of the data obtained with the detector before April 2021 is presented as well as the analysis of the very first data from the new KM3NeT/ARCA configuration. The performance is demonstrated using atmospheric muons and the first atmospheric neutrinos are shown.
2023-03-28T18:12:05Z
Coniglione, R.
Markou, Christos
Müller, R R
Tzamariudaki, Ekaterini
Ageron, M.
Aiello, S
Albert, Arthur
Alshamsi, Mohammed
Alves Garre, Sergio
Aly, Zineb
Ambrosone, Antonio
Ameli, Fabrizio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
The KM3NeT Collaboration is constructing two deep-sea Cherenkov detectors in the Mediterranean Sea, aiming at neutrino oscillation measurements with the ORCA array, while the ARCA array aims at neutrino astronomy in the TeV range. In April 2021, 5 additional detection units were deployed in the ARCA site. The KM3NeT/ARCA instrumented volume is currently similar to the one of the ANTARES neutrino telescope. In this contribution, an analysis of the data obtained with the detector before April 2021 is presented as well as the analysis of the very first data from the new KM3NeT/ARCA configuration. The performance is demonstrated using atmospheric muons and the first atmospheric neutrinos are shown.
Draw me a neutrino: the first KM3NeT art contest
Ageron, M.
Aiello, S
Alshamsi, Mohammed
Ambrosone, Antonio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Bagatelas, Christos
http://hdl.handle.net/2117/385641
2023-03-28T18:00:23Z
2023-03-28T17:55:24Z
Draw me a neutrino: the first KM3NeT art contest
Ageron, M.; Aiello, S; Alshamsi, Mohammed; Ambrosone, Antonio; André, Michel; Androulakis, Giorgos; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, J.; Bagatelas, Christos
While the KM3NeT neutrino detector is being deployed in the Mediterranean Sea, the Collaboration launched a contest searching for illustrations of the neutrinos it will detect. The participants in the contest were invited to submit their interpretation of a neutrino, using any technique. More than 500 drawings were submitted from sixteen different countries. The winners were selected by a jury of scientists, artists and science communicators based on the originality and creativity of the drawings, as well as the harmony with the properties and origin of the neutrinos. After announcing the results in an online ceremony with a large international audience, the winning drawings have been put on display in a dedicated KM3NeT Virtual Neutrino Art Centre. In this contribution, we will explain the motivation for the contest and will describe how it was organized. We will also show the winning drawings and present the results of an impact study carried out during the contest.
2023-03-28T17:55:24Z
Ageron, M.
Aiello, S
Alshamsi, Mohammed
Ambrosone, Antonio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Bagatelas, Christos
While the KM3NeT neutrino detector is being deployed in the Mediterranean Sea, the Collaboration launched a contest searching for illustrations of the neutrinos it will detect. The participants in the contest were invited to submit their interpretation of a neutrino, using any technique. More than 500 drawings were submitted from sixteen different countries. The winners were selected by a jury of scientists, artists and science communicators based on the originality and creativity of the drawings, as well as the harmony with the properties and origin of the neutrinos. After announcing the results in an online ceremony with a large international audience, the winning drawings have been put on display in a dedicated KM3NeT Virtual Neutrino Art Centre. In this contribution, we will explain the motivation for the contest and will describe how it was organized. We will also show the winning drawings and present the results of an impact study carried out during the contest.
Constraining the contribution of Gamma-Ray Bursts to the high-energy diffuse neutrino flux with 10 years of ANTARES data
Alves Garre, Sergio
André, Michel
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Belhorma, Bouchra
Bendahman, Meriem
Bertin, Vincent
Bissinger, Matthias
Boumaaza, Jihad
http://hdl.handle.net/2117/385640
2023-03-29T12:19:44Z
2023-03-28T17:43:54Z
Constraining the contribution of Gamma-Ray Bursts to the high-energy diffuse neutrino flux with 10 years of ANTARES data
Alves Garre, Sergio; André, Michel; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, J.; Belhorma, Bouchra; Bendahman, Meriem; Bertin, Vincent; Bissinger, Matthias; Boumaaza, Jihad
Addressing the origin of the observed diffuse astrophysical neutrino flux is one of the main challenges in the context of the neutrino astronomy nowadays. Among several astrophysical sources, Gamma-Ray Bursts (GRBs) are considered interesting candidates to be explored. Indeed, being the most powerful explosions observable in the Universe, they are potentially able to achieve the energetics required to reproduce the neutrino flux. Thus, they are expected to provide at least some contribution to the astrophysical diffuse neutrino flux. Within the framework of the fireball model, mesons can be produced during photo-hadronic interactions occurring in the internal shocks between shells emitted by the central engine; from their decays, high-energy gamma rays and neutrinos are expected to be generated. Within this scenario, the results of a stacked search for astrophysical muon neutrinos performed in space and time coincidence with 784 GRBs in the period 2007-2017 using ANTARES data are presented. The neutrino flux expectation from each GRB detectable by ANTARES was calculated in the framework of the classical internal shock model. Given the absence of coincident neutrinos, the contribution of the detected GRB population to the neutrino diffuse flux is constrained to be less than 10% around 100 TeV. In addition, the systematic uncertainties on the diffuse flux are computed by propagating to the stacked limit the uncertainties on the model parameters for each individual burst.
2023-03-28T17:43:54Z
Alves Garre, Sergio
André, Michel
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Aublin, J.
Belhorma, Bouchra
Bendahman, Meriem
Bertin, Vincent
Bissinger, Matthias
Boumaaza, Jihad
Addressing the origin of the observed diffuse astrophysical neutrino flux is one of the main challenges in the context of the neutrino astronomy nowadays. Among several astrophysical sources, Gamma-Ray Bursts (GRBs) are considered interesting candidates to be explored. Indeed, being the most powerful explosions observable in the Universe, they are potentially able to achieve the energetics required to reproduce the neutrino flux. Thus, they are expected to provide at least some contribution to the astrophysical diffuse neutrino flux. Within the framework of the fireball model, mesons can be produced during photo-hadronic interactions occurring in the internal shocks between shells emitted by the central engine; from their decays, high-energy gamma rays and neutrinos are expected to be generated. Within this scenario, the results of a stacked search for astrophysical muon neutrinos performed in space and time coincidence with 784 GRBs in the period 2007-2017 using ANTARES data are presented. The neutrino flux expectation from each GRB detectable by ANTARES was calculated in the framework of the classical internal shock model. Given the absence of coincident neutrinos, the contribution of the detected GRB population to the neutrino diffuse flux is constrained to be less than 10% around 100 TeV. In addition, the systematic uncertainties on the diffuse flux are computed by propagating to the stacked limit the uncertainties on the model parameters for each individual burst.
Indirect dark matter searches with neutrinos from the Galactic Centre region with the ANTARES and KM3NeT telescopes
Ageron, M.
Aiello, S
Aublin, J.
Alshamsi, Mohammed
Alves Garre, Sergio
André, Michel
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Albert, Arthur
Belhorma, Bouchra
Bendahman, Meriem
Bertin, Vincent
Bissinger, Matthias
Boumaaza, Jihad
http://hdl.handle.net/2117/385561
2023-03-27T11:10:19Z
2023-03-27T11:03:41Z
Indirect dark matter searches with neutrinos from the Galactic Centre region with the ANTARES and KM3NeT telescopes
Ageron, M.; Aiello, S; Aublin, J.; Alshamsi, Mohammed; Alves Garre, Sergio; André, Michel; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Albert, Arthur; Belhorma, Bouchra; Bendahman, Meriem; Bertin, Vincent; Bissinger, Matthias; Boumaaza, Jihad
An anomalous flux of neutrinos produced in hypothetical annihilations or decays of dark matter inside a source would produce a signal observable with neutrino telescopes. As suggested by observations, a conspicuous amount of dark matter is believed to accumulate in the centre of our Galaxy, which is in neat visibility for the Mediterranean underwater telescopes ANTARES and KM3NeT. Searches have been conducted with a maximum likelihood method to identify the presence of a dark matter signature in the neutrino flux measured by ANTARES. Results of all-flavour searches for WIMPs with masses from 50 GeV/c2 up to 100 TeV/c2 over the whole operation period from 2007 to 2020 are presented here. Alternative scenarios which propose a dark matter candidate in the heavy sector extensions of the Standard Model would produce a clear signature in the ANTARES telescope, that can exploit its view of the Galactic Centre up to high energies. The presentation of Galactic Centre searches is completed with ongoing analyses and future potential of the KM3NeT telescope, in phased construction in the Mediterranean Sea
2023-03-27T11:03:41Z
Ageron, M.
Aiello, S
Aublin, J.
Alshamsi, Mohammed
Alves Garre, Sergio
André, Michel
Anghinolfi, Marco
Anton, Gisela
Ardid Ramírez, Miguel
Albert, Arthur
Belhorma, Bouchra
Bendahman, Meriem
Bertin, Vincent
Bissinger, Matthias
Boumaaza, Jihad
An anomalous flux of neutrinos produced in hypothetical annihilations or decays of dark matter inside a source would produce a signal observable with neutrino telescopes. As suggested by observations, a conspicuous amount of dark matter is believed to accumulate in the centre of our Galaxy, which is in neat visibility for the Mediterranean underwater telescopes ANTARES and KM3NeT. Searches have been conducted with a maximum likelihood method to identify the presence of a dark matter signature in the neutrino flux measured by ANTARES. Results of all-flavour searches for WIMPs with masses from 50 GeV/c2 up to 100 TeV/c2 over the whole operation period from 2007 to 2020 are presented here. Alternative scenarios which propose a dark matter candidate in the heavy sector extensions of the Standard Model would produce a clear signature in the ANTARES telescope, that can exploit its view of the Galactic Centre up to high energies. The presentation of Galactic Centre searches is completed with ongoing analyses and future potential of the KM3NeT telescope, in phased construction in the Mediterranean Sea
Sensitivity estimates for diffuse, point-like and extended neutrino sources with KM3NeT/ARCA
Ageron, M.
Aiello, S
Albert, Arthur
Alshamsi, Mohammed
Alves Garre, Sergio
Aly, Zineb
Ambrosone, Antonio
Ameli, Fabrizio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anguita, M.
Anton, Gisela
Ardid Ramírez, Miguel
Guàrdia Riera, M. del Roser
http://hdl.handle.net/2117/385560
2023-03-27T10:50:21Z
2023-03-27T10:45:31Z
Sensitivity estimates for diffuse, point-like and extended neutrino sources with KM3NeT/ARCA
Ageron, M.; Aiello, S; Albert, Arthur; Alshamsi, Mohammed; Alves Garre, Sergio; Aly, Zineb; Ambrosone, Antonio; Ameli, Fabrizio; André, Michel; Androulakis, Giorgos; Anghinolfi, Marco; Anguita, M.; Anton, Gisela; Ardid Ramírez, Miguel; Guàrdia Riera, M. del Roser
The identification of cosmic objects emitting high energy neutrinos could provide new insights about the Universe and its active sources. The existence of these cosmic neutrinos has been proven by the IceCube collaboration, but the big question of which sources these neutrinos originate from, remains unanswered. The KM3NeT detector for Astroparticle Research with Cosmics in the Abyss (ARCA), with a cubic kilometer instrumented volume, is currently being built in the Mediterranean Sea. It will excel at identifying cosmic neutrino sources due to its unprecedented angular resolution for muon neutrinos. KM3NeT has a view of the sky complementary to IceCube, and is sensitive to neutrinos across a wide range of energies. In order to identify the signature of cosmic neutrino sources in the background of atmospheric neutrinos and muons, statistical methods are being developed and tested with Monte-Carlo pseudo-experiments. This contribution presents the most recent sensitivity estimates for diffuse, point-like and extended neutrino sources with KM3NeT/ARCA
2023-03-27T10:45:31Z
Ageron, M.
Aiello, S
Albert, Arthur
Alshamsi, Mohammed
Alves Garre, Sergio
Aly, Zineb
Ambrosone, Antonio
Ameli, Fabrizio
André, Michel
Androulakis, Giorgos
Anghinolfi, Marco
Anguita, M.
Anton, Gisela
Ardid Ramírez, Miguel
Guàrdia Riera, M. del Roser
The identification of cosmic objects emitting high energy neutrinos could provide new insights about the Universe and its active sources. The existence of these cosmic neutrinos has been proven by the IceCube collaboration, but the big question of which sources these neutrinos originate from, remains unanswered. The KM3NeT detector for Astroparticle Research with Cosmics in the Abyss (ARCA), with a cubic kilometer instrumented volume, is currently being built in the Mediterranean Sea. It will excel at identifying cosmic neutrino sources due to its unprecedented angular resolution for muon neutrinos. KM3NeT has a view of the sky complementary to IceCube, and is sensitive to neutrinos across a wide range of energies. In order to identify the signature of cosmic neutrino sources in the background of atmospheric neutrinos and muons, statistical methods are being developed and tested with Monte-Carlo pseudo-experiments. This contribution presents the most recent sensitivity estimates for diffuse, point-like and extended neutrino sources with KM3NeT/ARCA