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Esta colección está formada por artículos, conferencias, comunicaciones y otras publicaciones elaborados por miembros de la Universitat Politècnica de València.
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Browsing Artículos, conferencias, monografías by Sponsor "Abdus Salam International Centre for Theoretical Physics"
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- PublicationArchitecture and performance of the KM3NeT front-end firmware(Society of Photo-optical Instrumentation Engineers (SPIE), 2021-01) Aiello, Sebastiano; Albert, Arnauld; Alves Garre, Sergio; Aly, Zine; Ameli, Fabrizio; Andre, Michel; Androulakis, Giorgos; Anghinolfi, Marco; Anguita, Mancia; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, Julien; Bagatelas, Christos; Barbarino, Giancarlo; Baret, Bruny; Diego-Tortosa, Dídac; Espinosa Roselló, Víctor; Martínez Mora, Juan Antonio; Poirè, Chiara; Dpto. de Física Aplicada; Escuela Técnica Superior de Ingeniería del Diseño; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; LabEx UnivEarthS; European Commission; Junta de Andalucía; GENERALITAT VALENCIANA; Deutsche Forschungsgemeinschaft; AGENCIA ESTATAL DE INVESTIGACION; Institut Universitaire de France; National Science Centre, Polonia; Agencia Estatal de Investigación; European Regional Development Fund; Instituto Nazionale di Fisica Nucleare; Agence Nationale de la Recherche, Francia; Shota Rustaveli National Science Foundation; Netherlands Organization for Scientific Research; National Authority for Scientific Research, Rumanía; Centre National de la Recherche Scientifique, Francia; General Secretariat for Research and Technology, Grecia; Abdus Salam International Centre for Theoretical Physics; Ministero dell'Istruzione dell'Università e della Ricerca; Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona[EN] The KM3NeT infrastructure consists of two deep-sea neutrino telescopes being deployed in the Mediterranean Sea. The telescopes will detect extraterrestrial and atmospheric neutrinos by means of the incident photons induced by the passage of relativistic charged particles through the seawater as a consequence of a neutrino interaction. The telescopes are configured in a three-dimensional grid of digital optical modules, each hosting 31 photomultipliers. The photomultiplier signals produced by the incident Cherenkov photons are converted into digital information consisting of the integrated pulse duration and the time at which it surpasses a chosen threshold. The digitization is done by means of time to digital converters (TDCs) embedded in the field programmable gate array of the central logic board. Subsequently, a state machine formats the acquired data for its transmission to shore. We present the architecture and performance of the front-end firmware consisting of the TDCs and the state machine
- PublicationCombined sensitivity of JUNO and KM3NeT/ORCA to the neutrino mass ordering(Springer-Verlag, 2022-03-09) Aiello, S.; Albert, A.; Alshamsi, M.; Alves Garre, S.; Aly, Z.; Ambrosone, A.; Ameli, F.; Andre, M.; Androulakis, G.; Anghinolfi, M.; Anguita, M.; Ardid Ramírez, Miguel; Ardid Ramírez, Joan Salvador; Aublin, J.; Bagatelas, C.; Bou Cabo, M.; Diego-Tortosa, D.; Espinosa Roselló, Víctor; García Méndez, Juan; Llorens Alvarez, Carlos David; Martínez Mora, Juan Antonio; Poirè, Chiara; Dpto. de Física Aplicada; Escuela Técnica Superior de Ingeniería del Diseño; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; LabEx UnivEarthS; European Commission; Junta de Andalucía; GENERALITAT VALENCIANA; Deutsche Forschungsgemeinschaft; AGENCIA ESTATAL DE INVESTIGACION; Institut Universitaire de France; National Science Centre, Polonia; Agencia Estatal de Investigación; European Regional Development Fund; Instituto Nazionale di Fisica Nucleare; Agence Nationale de la Recherche, Francia; Shota Rustaveli National Science Foundation; Netherlands Organization for Scientific Research; National Authority for Scientific Research, Rumanía; Centre National de la Recherche Scientifique, Francia; General Secretariat for Research and Technology, Grecia; Abdus Salam International Centre for Theoretical Physics; Ministero dell'Istruzione, dell'Università e della Ricerca; Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona[EN] This article presents the potential of a combined analysis of the JUNO and KM3NeT/ORCA experiments to determine the neutrino mass ordering. This combination is particularly interesting as it significantly boosts the potential of either detector, beyond simply adding their neutrino mass ordering sensitivities, by removing a degeneracy in the determination of ¿m² between the two experiments when assuming the wrong ordering. The study is based on the latest projected performances for JUNO, and on simulation tools using a full Monte Carlo approach to the KM3NeT/ORCA response with a careful assessment of its energy systematics. From this analysis, a 5¿ determination of the neutrino mass ordering is expected after 6 years of joint data taking for any value of the oscillation parameters. This sensitivity would be achieved after only 2 years of joint data taking assuming the current global best-fit values for those parameters for normal ordering.
- PublicationImplementation and first results of the KM3NeT real-time core-collapse supernova neutrino search(Springer-Verlag, 2022-04-11) Aiello, S.; Albert, A.; Alshamsi, M.; Alves Garre, S.; Aly, Z.; Ambrosone, A.; Ameli, F.; Andre, M.; Androulakis, G.; Anghinolfi, M.; Anguita, M.; Ardid Ramírez, Miguel; Ardid Ramírez, Joan Salvador; Aublin, J.; Bagatelas, C.; Bou Cabo, Manuel; Diego-Tortosa, Dídac; Espinosa Roselló, Víctor; Llorens Alvarez, Carlos David; Martínez Mora, Juan Antonio; Poirè, Chiara; Dpto. de Física Aplicada; Escuela Técnica Superior de Ingeniería del Diseño; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; LabEx UnivEarthS; European Commission; Junta de Andalucía; GENERALITAT VALENCIANA; AGENCIA ESTATAL DE INVESTIGACION; National Science Centre, Polonia; Agencia Estatal de Investigación; Agence Nationale de la Recherche, Francia; Shota Rustaveli National Science Foundation; Abdus Salam International Centre for Theoretical Physics; Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona; Ministero dell Istruzione, dell Università e della Ricerca[EN] The KM3NeT research infrastructure is uncon- struction in the Mediterranean Sea. KM3NeT will study atmospheric and astrophysical neutrinos with two multi- purpose neutrino detectors, ARCA and ORCA, primar-ily aimed at GeV¿PeV neutrinos. Thanks to the multi-photomultiplier tube design of the digital optical modules, KM3NeT is capable of detecting the neutrino burst from a Galactic or near-Galactic core-collapse supernova. This potential is already exploitable with the first detection units deployed in the sea. This paper describes the real-time imple- mentation of the supernova neutrino search, operating on the two KM3NeT detectors since the first months of 2019. A quasi-online astronomy analysis is introduced to study the time profile of the detected neutrinos for especially signifi- cant events. The mechanism of generation and distribution of alerts, as well as the integration into the SNEWS and SNEWS 2.0 global alert systems, are described. The approach for the follow-up of external alerts with a search for a neutrino excess in the archival data is defined. Finally, an overview of the cur-rent detector capabilities and a report after the first two years of operation are given.
- PublicationNanobeacon: A time calibration device for the KM3NeT neutrino telescope(Elsevier, 2022-10-01) Aiello, S.; Albert, A.; Alshamsi, M.; Alves Garre, S.; Aly, Z.; Ambrosone, A.; Ameli, F.; Andre, M.; Androulakis, G.; Anghinolfi, M.; Anguita, M.; Ardid Ramírez, Miguel; Ardid Ramírez, Joan Salvador; Aublin, J.; Bagatelas, C.; Bou Cabo, M.; Diego-Tortosa, Dídac; Espinosa Roselló, Víctor; Llorens Alvarez, Carlos David; Martínez Mora, Juan Antonio; Poirè, Chiara; Dpto. de Física Aplicada; Escuela Técnica Superior de Ingeniería del Diseño; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; LabEx UnivEarthS; European Commission; Junta de Andalucía; GENERALITAT VALENCIANA; AGENCIA ESTATAL DE INVESTIGACION; National Science Centre, Polonia; Agencia Estatal de Investigación; Agence Nationale de la Recherche, Francia; Shota Rustaveli National Science Foundation; Abdus Salam International Centre for Theoretical Physics; Ministero dell'Istruzione, dell'Università e della Ricerca; Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona[EN] The KM3NeT Collaboration is currently constructing a multi-site high-energy neutrino telescope in the Mediterranean Sea consisting of matrices of pressure-resistant glass spheres, each holding a set of 31 small-area photomultipliers. The main goals of the telescope are the observation of neutrino sources in the Universe and the measurement of the neutrino oscillation parameters with atmospheric neutrinos. A relative time synchronisation between photomultipliers of the nanosecond arder needed to guarantee the required angular resolution of the detector. Due to the large detector volumes to be instrumented by KM3NeT, a cost reduction of the different systems is a priority. To this end, the inexpensive Nanobeacon has been designed and developed by the KM3NeT Collaboration to be used for detector time-calibration studies. At present, more than 600 Nanobeacons have been already produced. The characterisation of the optical pulse and the wavelength emission profile of the devices is critica! for the time calibration. The optical pulse rise time has been quantified as less than 3 ns, while the Full Width Half Maximum is less than 6 ns. The wavelength drift, due to a variation of the supply voltage, has also been qualified as lower than 10 nm for the full range of the Nanobeacon. In this paper, more details about the main features of the Nanobeacon design, production and operation, together with the main properties of the light pulse generated are described.
- PublicationSensitivity to light sterile neutrino mixing parameters with KM3NeT/ORCA(Springer-Verlag, 2021-10-21) Aiello, S.; Albert, A.; Alshamsi, M.; Alves Garre, S.; Aly, Z.; Ambrosone, A.; Ameli, F.; Andre, M.; Androulakis, G.; Anghinolfi, M.; Anguita, M.; Anton, G.; Ardid Ramírez, Miguel; Ardid Ramírez, Joan Salvador; Aublin, J.; Bou Cabo, M.; Diego-Tortosa, D.; Espinosa Roselló, Víctor; García Méndez, J.; Martínez Mora, Juan Antonio; Poirè, Chiara; Dpto. de Física Aplicada; Escuela Técnica Superior de Ingeniería del Diseño; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; European Commission; Junta de Andalucía; GENERALITAT VALENCIANA; Deutsche Forschungsgemeinschaft; AGENCIA ESTATAL DE INVESTIGACION; Institut Universitaire de France; National Science Centre, Polonia; Agencia Estatal de Investigación; European Regional Development Fund; Instituto Nazionale di Fisica Nucleare; Agence Nationale de la Recherche, Francia; Shota Rustaveli National Science Foundation; Netherlands Organization for Scientific Research; National Authority for Scientific Research, Rumanía; Centre National de la Recherche Scientifique, Francia; General Secretariat for Research and Technology, Grecia; Abdus Salam International Centre for Theoretical Physics; Ministero dell'Istruzione dell'Università e della Ricerca; Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona[EN] KM3NeT/ORCA is a next-generation neutrino telescope optimised for atmospheric neutrino oscillations studies. In this paper, the sensitivity of ORCA to the presence of a light sterile neutrino in a 3+1 model is presented. After three years of data taking, ORCA will be able to probe the active-sterile mixing angles ¿¿¿, ¿¿¿, ¿¿¿ and the effective angle ¿µ¿, over a broad range of mass squared difference ¿m² ~ [10¿5, 10] eV2, allowing to test the eV-mass sterile neutrino hypothesis as the origin of short baseline anomalies, as well as probing the hypothesis of a very light sterile neutrino, not yet constrained by cosmology. ORCA will be able to explore a relevant fraction of the parameter space not yet reached by present measurements.
- PublicationThe KM3NeT potential for the next core-collapse supernova observation with neutrinos(Springer-Verlag, 2021-05) Aiello, S.; Albert, A.; Garre, S. Alves; Aly, Z.; Ambrosone, A.; Ameli, F.; Andre, M.; Androulakis, G.; Anghinolfi, M.; Anguita, M.; Anton, G.; Ardid Ramírez, Miguel; Ardid Ramírez, Joan Salvador; Aublin, J.; Bagatelas, C.; Bou Cabo, Manuel; Diego-Tortosa, Dídac; Espinosa Roselló, Víctor; Martínez Mora, Juan Antonio; Poirè, Chiara; Dpto. de Física Aplicada; Escuela Técnica Superior de Ingeniería del Diseño; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; European Commission; Junta de Andalucía; GENERALITAT VALENCIANA; AGENCIA ESTATAL DE INVESTIGACION; National Science Centre, Polonia; Agencia Estatal de Investigación; Agence Nationale de la Recherche, Francia; Shota Rustaveli National Science Foundation; Abdus Salam International Centre for Theoretical Physics; Ministero dell'Istruzione dell'Università e della Ricerca; Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona[EN] The KM3NeT research infrastructure is under construction in the Mediterranean Sea. It consists of two water Cherenkov neutrino detectors, ARCA and ORCA, aimed at neutrino astrophysics and oscillation research, respectively. Instrumenting a large volume of sea water with 6200 optical modules comprising a total of 200,000 photomultiplier tubes, KM3NeT will achieve sensitivity to 10 MeV neutrinos from Galactic and near-Galactic core-collapse supernovae through the observation of coincident hits in photomultipliers above the background. In this paper, the sensitivity of KM3NeT to a supernova explosion is esti- mated from detailed analyses of background data from the first KM3NeT detection units and simulations of the neutrino signal. The KM3NeT observational horizon (for a 5 ¿ discovery) covers essentially the Milky-Way and for the most optimistic model, extends to the Small Magellanic Cloud (60 kpc). Detailed studies of the time profile of the neutrino signal allow assessment of the KM3NeT capability to deter- mine the arrival time of the neutrino burst with a few millisec- onds precision for sources up to 5¿8 kpc away, and detecting the peculiar signature of the standing accretion shock insta- bility if the core-collapse supernova explosion happens closer than 3¿5 kpc, depending on the progenitor mass. KM3NeT¿s capability to measure the neutrino flux spectral parameters is also presented.