Multi-messenger tests of the IceCube excess

Journal Article · Tue Nov 18 04:00:00 EST 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4902764· OSTI ID:22390630

Ahlers, Markus ^[1]

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1. Wisconsin IceCube Particle Astrophysics Center (WIPAC) and Department of Physics, University of Wisconsin-Madison, Madison, WI 53706 (United States)

The IceCube Collaboration has recently found evidence for an excess of high energy neutrinos above atmospheric backgrounds. The origin of this “IceCube excess” is unknown, but multi-messenger relations with cosmic rays (CRs) and γ-rays can help to pinpoint possible candidate sources. The primary CRs associated with the signal are expected to reach energies of about 40 PeV per nucleon which can be satisfied by (extreme) Galactic or extragalactic sources. I discuss possible relations of the IceCube excess with the sources of ultra-high energy CRs and implications of γ-ray observations for various Galactic or extragalactic candidate sources. The contribution of Galactic sources can be tested via primary TeV-PeV γ-rays from the decay of neutral pions produced by the same CRs responsible for the neutrino emission. Hadronuclear interactions of CRs in extragalactic sources can be constrained by the GeV-TeV diffuse extragalactic γ-ray background.

• OSTI ID: 22390630
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1630; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CHERENKOV COUNTERS
GEV RANGE
MULTIPARTICLE SPECTROMETERS
NEUTRINO DETECTION
NEUTRINOS
NUCLEONS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PEV RANGE
PIONS NEUTRAL
SCINTILLATION COUNTERS
SIGNALS
TELESCOPE COUNTERS
TEV RANGE