Determination of the atmospheric neutrino flux and searches for new physics with AMANDA-II

Naturally occurring energetic neutrinos produced by interactions of cosmic rays in the atmosphere produce a signal in deep underground detectors which is a convolution of neutrino flux, neutrino cross section and detection efficiency. The predicted ratio of events induced by v e as compared to v μ is relatively robust (because many sources of uncertainty cancel in the ratio), but it differs significantly from what is observed. Interpretations that involve new physics (e.g. neutrino oscillations or nucleon decay) have been proposed. One interpretation in terms of neutrino oscillations would imply a low value of neutrino-induced upward muons. Although there is no strong evidence for such a deficit, uncertainties in calculating the expected absolute rate prevent one from eliminating this interpretation at present. Precise measurement of muon fluxes at high altitude, as well as calibration of detectors with neutrino beams from accelerators, will help clarify the situation.

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The Antares And Km3Net Neutrino Telescopes: Status And Outlook For Acoustic Studies

EPJ Web of Conferences ◽

10.1051/epjconf/201921601004 ◽

2019 ◽

Vol 216 ◽

pp. 01004

Author(s):

Véronique Van Elewyck

Keyword(s):

Atmospheric Neutrino ◽

Neutrino Flux ◽

High Energy ◽

Neutrino Telescope ◽

Mass Hierarchy ◽

Neutrino Mass Hierarchy ◽

Neutrino Telescopes ◽

Cosmic Neutrino ◽

Under Construction

The ANTARES detector has been operating continuously since 2007 in the Mediterranean Sea, demonstrating the feasibility of an undersea neutrino telescope. Its superior angular resolution in the reconstruction of neutrino events of all flavors results in unprecedented sensitivity for neutrino source searches in the southern sky at TeV energies, so that valuable constraints can be set on the origin of the cosmic neutrino flux discovered by theIceCube detector. The next generation KM3NeT neutrino telescope is now under construction, featuring two detectors with the same technology but different granularity: ARCA designed to search for high energy (TeV-PeV) cosmic neutrinos and ORCA designed to study atmospheric neutrino oscillations at the GeV scale, focusing on the determination of the neutrino mass hierarchy. Both detectors use acoustic devices for positioning calibration, and provide testbeds for acoustic neutrino detection.

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Theory Predictions for Inclusive atmospheric Neutrino flux

EPJ Web of Conferences ◽

10.1051/epjconf/20135209002 ◽

2013 ◽

Vol 52 ◽

pp. 09002

Author(s):

Morihiro Honda

Keyword(s):

Atmospheric Neutrino ◽

Neutrino Flux

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Multimessenger Probes for New Physics in Light of A. Sakharov’s Legacy in Cosmoparticle Physics

Universe ◽

10.3390/universe7070222 ◽

2021 ◽

Vol 7 (7) ◽

pp. 222

Author(s):

Maxim Khlopov

Keyword(s):

Standard Model ◽

Particle Physics ◽

New Physics ◽

Physical Models ◽

Beyond The Standard Model ◽

Fundamental Relationship ◽

Relationship Of ◽

The Universe ◽

Selection Of

A.D. Sakharov’s legacy in now standard model of the Universe is not reduced to baryosynthesis but extends to the foundation of cosmoparticle physics, which studies the fundamental relationship of cosmology and particle physics. Development of cosmoparticle physics involves cross-disciplinary physical, astrophysical and cosmological studies of physics Beyond the Standard model (BSM) of elementary particles. To probe physical models for inflation, baryosynthesis and dark matter cosmoparticle physics pays special attention to model dependent messengers of the corresponding models, making their tests possible. Positive evidence for such exotic phenomena as nuclear interacting dark atoms, primordial black holes or antimatter globular cluster in our galaxy would provide the selection of viable BSM models determination of their parameters.

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