66 research outputs found
Contributions of KM3NeT to ICRC2023
This document collects the contributions of the KM3NeT collaboration to the
ICRC2023 conference, held from July 26 to August 3, 2023, in Nagoya, Japan.
KM3NeT submitted 38 contributions to ICRC2023, on neutrino- and multimessenger
astronomy, neutrino oscillation physics, cosmic ray physics, searches for dark
matter and exotics, calibration, technical detector descriptions, and art.
Proceedings are published in Proceedings of Science.Comment: 306 pages, many figures. Collection of proceedings contributions to
ICRC2023, published in PoS(ICRC2023), https://pos.sissa.it/444
Inertial bioluminescence rhythms at the Capo Passero (KM3NeT-Italia) site, Central Mediterranean Sea
Peer reviewedPublisher PD
KM3NeT broadcast optical data transport system
The optical data transport system of the KM3NeT neutrino telescope at the bottom of
the Mediterranean Sea will provide more than 6000 optical modules in the detector arrays with a
point-to-point optical connection to the control stations onshore. The ARCA and ORCA detectors of
KM3NeT are being installed at a depth of about 3500m and 2500 m, respectively and their distance
to the control stations is about 100 kilometers and 40 kilometers. In particular, the two detectors are
optimised for the detection of cosmic neutrinos with energies above about 1 TeV (ARCA) and for the
detection of atmospheric neutrinos with energies in the range 1 GeV–1 TeV (ORCA). The expected
maximum data rate is 200 Mbps per optical module. The implemented optical data transport system
matches the layouts of the networks of electro-optical cables and junction boxes in the deep sea. For
efficient use of the fibres in the system the technology of Dense Wavelength Division Multiplexing is
applied. The performance of the optical system in terms of measured bit error rates, optical budget
are presented. The next steps in the implementation of the system are also discussed.Agence Nationale de la
Recherche (contract ANR-15-CE31-0020)Centre National de la Recherche Scientifique (CNRS)Commission Européenne (FEDER fund and Marie Curie Program), Institut Universitaire de France
(IUF), LabEx UnivEarthS (ANR-10-LABX-0023 and ANR-18-IDEX-0001)Paris Île-de-France
Region, France; Deutsche Forschungsgemeinschaft (DFG)Germany; The General Secretariat of
Research and Innovation (GSRI)Greece Istituto Nazionale di Fisica Nucleare (INFN), Ministero
dell’Università e della Ricerca (MIUR), PRIN 2017 program (Grant NAT-NET 2017W4HA7S) ItalyMinistry of Higher EducationScientific Research and InnovationMorocco, and the Arab Fund
for Economic and Social Development, KuwaitNederlandse organisatie voor Wetenschappel¼k
Onderzoek (NWO)The National Science Centre, Poland (2021/41/N/ST2/01177)National Authority for Scientific Research (ANCS)Romania; Ministerio de Ciencia, Innovación,
Investigación y Universidades (MCIU)Programa Estatal de Generación de Conocimiento (refs.
PGC2018-096663-B-C41-A-C42-B-C43-B-C44PID2021-124591NB-C41-C42,
-C43)MCIU/FEDERGeneralitat ValencianaPrometeo (PROMETEO/2020/019)Grisolía (refs.
GRISOLIA/2018/119, /2021/192)GenT (refs. CIDEGENT/2018/034, /2019/043, /2020/049,
/2021/023) programsJunta de Andalucía (ref. A-FQM-053-UGR18)La Caixa Foundation (ref.
LCF/BQ/IN17/11620019)EU: MSC program (ref. 101025085Spain; María Zambrano program
within the framework of grants for retaining in the Spanish university system (Spanish Ministry of
UniversitiesThe European Union, NextGenerationE
Ultra-high neutrino fluxes as a probe for non-standard physics
We examine how light neutrinos coming from distant active galactic nuclei
(AGN) and similar high energy sources may be used as tools to probe
non-standard physics. In particular we discuss how studying the energy spectra
of each neutrino flavour coming from such distant sources and their distortion
relative to each other may serve as pointers to exotic physics such as neutrino
decay, Lorentz symmetry violation, pseudo-Dirac effects, CP and CPT violation
and quantum decoherence. This allows us to probe hitherto unexplored ranges of
parameters for the above cases, for example lifetimes in the range s/eV for the case of neutrino decay. We show that standard
neutrino oscillations ensure that the different flavours arrive at the earth
with similar shapes even if their flavour spectra at source may differ strongly
in both shape and magnitude. As a result, observed differences between the
spectra of various flavours at the detector would be signatures of non-standard
physics altering neutrino fluxes during propagation rather than those arising
during their production at source. Since detection of ultra-high energy (UHE)
neutrinos is perhaps imminent, it is possible that such differences in spectral
shapes will be tested in neutrino detectors in the near future. To that end,
using the IceCube detector as an example, we show how our results translate to
observable shower and muon-track event rates.Comment: 16 pages, 10 figure
Probing invisible neutrino decay with KM3NeT/ORCA
The authors acknowledge the financial support of the funding agencies: Agence Nationale de la Recherche (contract ANR-15-CE31-0020), Centre National de la Recherche Scientifique (CNRS), Commission Européenne (FEDER fund and Marie Curie Program), LabEx UnivEarthS (ANR-10-LABX-0023 and ANR-18-IDEX-0001), Paris Île-de-France Region, France; The General Secretariat of Research and Innovation (GSRI), Greece Istituto Nazionale di Fisica Nucleare (INFN), Ministero dell’Università e della Ricerca (MIUR), PRIN 2017 program (Grant NAT-NET 2017W4HA7S) Italy; Ministry of Higher Education, Scientific Research and Innovation, Morocco, and the Arab Fund for Economic and Social Development, Kuwait; Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO), the Netherlands; The National Science Centre, Poland (2021/41/N/ST2/01177); National Authority for Scientific Research (ANCS), Romania; Grants PID2021-124591NB-C41, -C42, -C43 funded by MCIN/AEI/ 10.13039/501100011033 and, as appropriate, by “ERDF A way of making Europe”, by the “European Union” or by the “European Union NextGenerationEU/PRTR”, Programa de Planes Complementarios I+D+I (refs. ASFAE/2022/023, ASFAE/2022/014), Programa Prometeo (PROMETEO/2020/019) and GenT (refs. CIDEGENT/2018/034, /2019/043, /2020/049. /2021/23) of the Generalitat Valenciana, Junta de Andalucía (ref. SOMM17/6104/UGR, P18-FR-5057), EU: MSC program (ref. 101025085), Programa María Zambrano (Spanish Ministry of Universities, funded by the European Union, NextGenerationEU), Spain.In the era of precision measurements of the neutrino oscillation parameters, upcoming neutrino experiments will also be sensitive to physics beyond the Standard Model. KM3NeT/ORCA is a neutrino detector optimised for measuring atmospheric neutrinos from a few GeV to around 100 GeV. In this paper, the sensitivity of the KM3NeT/ORCA detector to neutrino decay has been explored. A three-flavour neutrino oscillation scenario, where the third neutrino mass state v3 decays into an invisible state, e.g. a sterile neutrino, is considered. We find that KM3NeT/ORCA would be sensitive to invisible neutrino decays with 1/alpha 3 = T3/m3 < 180 ps/eV at 90% confidence level, assuming true normal ordering. Finally, the impact of neutrino decay on the precision of KM3NeT/ORCA measurements for theta(23), Delta m(31)(2) and mass ordering have been studied. No significant effect of neutrino decay on the sensitivity to these measurements has been found.Commission Européenne FEDER fundCommission Européenn Marie Curie ProgramMCIN/AEI/ 10.13039/501100011033, ID2021-124591NB-C41, -C42,
-C43ERDFEuropean UnionEuropean Union NextGenerationEU/PRTRPlanes Complementarios I+D+I, ASFAE/2022/023,
ASFAE/2022/014PROMETEO/2020/019Generalitat Valenciana, GenT, CIDEGENT/2018/034, /2019/043, /2020/049, /2021/23Junta de
Andalucía SOMM17/6104/UGR, P18-FR-5057EU: MSC program 101025085European
Union, NextGenerationEU, Programa María Zambran
Determining the neutrino mass ordering and oscillation parameters with KM3NeT/ORCA
The authors acknowledge the financial support of the funding agencies: Agence Nationale de la Recherche (contract ANR-15-CE31-0020), Centre National de la Recherche Scientifique (CNRS), Commission Europeenne (FEDER fund and Marie Curie Program), Institut Universitaire de France (IUF), LabEx UnivEarthS (ANR-10-LABX-0023 and ANR-18-IDEX-0001), Paris Ile-de-France Region, France; Shota Rustaveli National Science Foundation of Georgia (SRNSFG, FR-18-1268), Georgia; Deutsche Forschungsgemeinschaft (DFG), Germany; The General Secretariat of Research and Technology (GSRT), Greece; Istituto Nazionale di Fisica Nucleare (INFN), Ministero dell'Universita e della Ricerca (MIUR), PRIN 2017 program (Grant NAT-NET 2017W4HA7S) Italy; Ministry of Higher Education Scientific Research and Professional Training, ICTP through Grant AF-13, Morocco; Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO), the Netherlands; The National Science Centre, Poland (2015/18/E/ST2/00758); National Authority for Scientific Research (ANCS), Romania; Ministerio de Ciencia, Innovacion, Investigacion y Universidades (MCIU): Programa Estatal de Generacion de Conocimiento (refs. PGC2018-096663-B-C41, -A-C42, -B-C43, -B-C44) (MCIU/FEDER), Severo Ochoa Centre of Excellence and MultiDark Consolider (MCIU), Junta de Andalucia (ref. SOMM17/6104/UGR), Generalitat Valenciana: Grisolia (ref. GRISOLIA/2018/119) and GenT (ref. CIDEGENT/2018/034 and CIDEGENT/2019/043) programs, La Caixa Foundation (ref. LCF/BQ/IN17/11620019), EU: MSC program (ref. 713673), Spain.The next generation of water Cherenkov neutrino telescopes in the Mediterranean Sea are under construction offshore France (KM3NeT/ORCA) and Sicily (KM3NeT/ARCA). The KM3NeT/ORCA detector features an energy detection threshold which allows to collect atmospheric neutrinos to study flavour oscillation. This paper reports the KM3NeT/ORCA sensitivity to this phenomenon. The event reconstruction, selection and classification are described. The sensitivity to determine the neutrino mass ordering was evaluated and found to be 4.4 sigma if the true ordering is normal and 2.3 sigma if inverted, after 3 years of data taking. The precision to measure Delta m(32)(2) and theta(23) were also estimated and found to be 85.10(-6) eV(2) and ((+1.9)(-3.1))degrees for normal neutrino mass ordering and, 75.10(-6) eV(2) and ((+2.0)(-7.0))degrees for inverted ordering. Finally, a unitarity test of the leptonic mixing matrix by measuring the rate of tau neutrinos is described. Three years of data taking were found to be sufficient to exclude (nu)over-left-right-arrow tau event rate variations larger than 20% at 3 sigma level.French National Research Agency (ANR) ANR-15-CE31-0020
Centre National de la Recherche Scientifique (CNRS)
Commission Europeenne (FEDER fund), France
Institut Universitaire de France (IUF), France
LabEx UnivEarthS, France ANR-10-LABX-0023
ANR-18-IDEX-0001
Paris Ile-de-France Region, FranceShota Rustaveli National Science Foundation of Georgia (SRNSFG), Georgia FR-18-1268German Research Foundation (DFG)The General Secretariat of Research and Technology (GSRT), GreeceIstituto Nazionale di Fisica Nucleare (INFN)Ministry of Education, Universities and Research (MIUR)PRIN 2017 program, Italy NAT-NET 2017W4HA7SMinistry of Higher Education Scientific Research and Professional Training, ICTP, Morocco AF-13Netherlands Organization for Scientific Research (NWO)
Netherlands GovernmentThe National Science Centre, Poland 2015/18/E/ST2/00758National Authority for Scientific Research (ANCS), RomaniaMinisterio de Ciencia, Innovacion, Investigacion y Universidades (MCIU): Programa Estatal de Generacion de Conocimiento, Spain PGC2018-096663-B-C41
PGC2018-096663-A-C42
PGC2018-096663-B-C43
PGC2018-096663-B-C44
Generalitat Valenciana: Grisolia program, Spain GRISOLIA/2018/119
La Caixa Foundation LCF/BQ/IN17/11620019EU: MSC program, Spain 713673Commission Europeenne (Marie Curie Program), FranceGeneralitat Valenciana: GenT programs, Spain CIDEGENT/2018/034
CIDEGENT/2019/043Ministerio de Ciencia, Innovacion, Investigacion y Universidades (MCIU): Severo Ochoa Centre of ExcellenceMinisterio de Ciencia, Innovacion, Investigacion y Universidades (MCIU): MultiDark Consolider (MCIU)Junta de Andalucia
European Commission SOMM17/6104/UG
Scalar Multiplet Dark Matter
We perform a systematic study of the phenomenology associated to models where
the dark matter consists in the neutral component of a scalar SU(2)_L n-uplet,
up to n=7. If one includes only the pure gauge induced annihilation
cross-sections it is known that such particles provide good dark matter
candidates, leading to the observed dark matter relic abundance for a
particular value of their mass around the TeV scale. We show that these values
actually become ranges of values -which we determine- if one takes into account
the annihilations induced by the various scalar couplings appearing in these
models. This leads to predictions for both direct and indirect detection
signatures as a function of the dark matter mass within these ranges. Both can
be largely enhanced by the quartic coupling contributions. We also explain how,
if one adds right-handed neutrinos to the scalar doublet case, the results of
this analysis allow to have altogether a viable dark matter candidate,
successful generation of neutrino masses, and leptogenesis in a particularly
minimal way with all new physics at the TeV scale.Comment: 43 pages, 20 figure
The Sound Emission Board of the KM3NeT Acoustic Positioning System
We describe the sound emission board proposed for installation in the
acoustic positioning system of the future KM3NeT underwater neutrino telescope.
The KM3NeT European consortium aims to build a multi-cubic kilometre underwater
neutrino telescope in the deep Mediterranean Sea. In this kind of telescope the
mechanical structures holding the optical sensors, which detect the Cherenkov
radiation produced by muons emanating from neutrino interactions, are not
completely rigid and can move up to dozens of meters in undersea currents.
Knowledge of the position of the optical sensors to an accuracy of about 10 cm
is needed for adequate muon track reconstruction. A positioning system based on
the acoustic triangulation of sound transit time differences between fixed
seabed emitters and receiving hydrophones attached to the kilometre-scale
vertical flexible structures carrying the optical sensors is being developed.
In this paper, we describe the sound emission board developed in the framework
of KM3NeT project, which is totally adapted to the chosen FFR SX30 ultrasonic
transducer and fulfils the requirements imposed by the collaboration in terms
of cost, high reliability, low power consumption, high acoustic emission power
for short signals, low intrinsic noise and capacity to use arbitrary signals in
emission mode.Comment: 9 pages, 4 figure
The Leptonic Higgs as a Messenger of Dark Matter
We propose that the leptonic cosmic ray signals seen by PAMELA and ATIC
result from the annihilation or decay of dark matter particles via states of a
leptonic Higgs doublet to leptons, linking cosmic ray signals of dark
matter to LHC signals of the Higgs sector. The states of the leptonic Higgs
doublet are lighter than about 200 GeV, yielding large and
event rates at the LHC. Simple models are
given for the dark matter particle and its interactions with the leptonic
Higgs, for cosmic ray signals arising from both annihilations and decays in the
galactic halo. For the case of annihilations, cosmic photon and neutrino
signals are on the verge of discovery.Comment: 34 pages, 9 figures, minor typos corrected, references adde
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