HARP: a hadron production experiment for the neutrino factory and for the atmospheric neutrino flux

2001 ◽  
Vol 100 (1-3) ◽  
pp. 130-132
Author(s):  
M.G. Catanesi
Keyword(s):  
Atmospheric Neutrino ◽  
Neutrino Flux ◽  
Hadron Production ◽  
Neutrino Factory ◽  
Production Experiment

scholarly journals Starburst galaxies strike back: a multi-messenger analysis with Fermi-LAT and IceCube data

2021 ◽  
Vol 503 (3) ◽  
pp. 4032-4049
Author(s):  
Antonio Ambrosone ◽  
Marco Chianese ◽  
Damiano F G Fiorillo ◽  
Antonio Marinelli ◽  
Gennaro Miele ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
Neutrino Flux ◽  
Data Interpretation ◽  
Realistic Model ◽  
High Energy ◽  
Starburst Galaxies ◽  
Neutrino Factory ◽  
High Energy Cosmic Rays ◽  
Astrophysical Objects

ABSTRACT Starburst galaxies, which are known as ‘reservoirs’ of high-energy cosmic-rays, can represent an important high-energy neutrino ‘factory’ contributing to the diffuse neutrino flux observed by IceCube. In this paper, we revisit the constraints affecting the neutrino and gamma-ray hadronuclear emissions from this class of astrophysical objects. In particular, we go beyond the standard prototype-based approach leading to a simple power-law neutrino flux, and investigate a more realistic model based on a data-driven blending of spectral indexes, thereby capturing the observed changes in the properties of individual emitters. We then perform a multi-messenger analysis considering the extragalactic gamma-ray background (EGB) measured by Fermi-LAT and different IceCube data samples: the 7.5-yr high-energy starting events (HESE) and the 6-yr high-energy cascade data. Along with starburst galaxies, we take into account the contributions from blazars and radio galaxies as well as the secondary gamma-rays from electromagnetic cascades. Remarkably, we find that, differently from the highly-constrained prototype scenario, the spectral index blending allows starburst galaxies to account for up to $40{{\ \rm per\ cent}}$ of the HESE events at $95.4{{\ \rm per\ cent}}$ CL, while satisfying the limit on the non-blazar EGB component. Moreover, values of $\mathcal {O}(100\, \mathrm{PeV})$ for the maximal energy of accelerated cosmic-rays by supernovae remnants inside the starburst are disfavoured in our scenario. In broad terms, our analysis points out that a better modelling of astrophysical sources could alleviate the tension between neutrino and gamma-ray data interpretation.

scholarly journals Prompt atmospheric neutrino flux

2017 ◽  
Author(s):  
Yu Seon Jeong ◽  
Atri Bhattacharya ◽  
Rikard Enberg ◽  
C.S. Kim ◽  
Mary Hall Reno ◽  
...  
Keyword(s):  
Atmospheric Neutrino ◽  
Neutrino Flux

scholarly journals On te Reduction of the Error in the Calculation of Low Energy (<1GeV) Atmospheric Neutrino Flux

2019 ◽  
Author(s):  
Morihiro Honda ◽  
M Sajjad Athar ◽  
T. Kajita ◽  
K. Kasahara ◽  
S. Midorikawa ◽  
...  
Keyword(s):  
Atmospheric Neutrino ◽  
Neutrino Flux ◽  
Low Energy

scholarly journals Improving the prediction of the Atmospheric neutrino flux using the atmospheric muon flux

2019 ◽  
Vol 208 ◽  
pp. 07001
Author(s):  
Morihiro Honda
Keyword(s):  
Energy Range ◽  
Energy Region ◽  
Test Bench ◽  
Atmospheric Neutrino ◽  
Neutrino Flux ◽  
Interaction Model ◽  
Muon Flux ◽  
Atmospheric Neutrinos ◽  
Hadronic Interaction ◽  
Atmospheric Muon

It is well known that the correlation of atmospheric neutrinos and muons are simply correlated in the energy region of 1–10 GeV, and used for the test bench of the hadronic interaction model used for the calculation of the atmospheric neutrino flux. However, the correlation becomes unclear for neutrinos in the energy range below 1 GeV, which is important for the study of mass ordering of neutrino and CP phase of the neutrino mass. We extend the study of the correlation to the lower neutrino energies and find that the atmospheric muon flux observed at high altitude shows a good correlation to the atmospheric neutrino flux, and could be used to calibrate the hadronic interaction model.

scholarly journals Production asymmetry of open charm mesons within unfavoured ragmentation scenario

2019 ◽  
Vol 199 ◽  
pp. 04007
Author(s):  
Rafał Maciuła
Keyword(s):  
Light Quark ◽  
Atmospheric Neutrino ◽  
Neutrino Flux ◽  
Meson Production ◽  
Lhcb Collaboration ◽  
Charm Mesons ◽  
Measured Asymmetry ◽  
Fragmentation Probability ◽  
Fragmentation Functions ◽  
Production Asymmetry

We consider unfavoured light quark/antiquark to D meson fragmentation. We discuss nonperturbative effects for small transverse momenta. The asymmetry for D+ and D- production measured by the LHCb collaboration provides natural constraints on the parton (quark/antiquark) fragmentation functions. We find that already a fraction of $q/\overline q \to D$ fragmentation probability is sufficient to account for the measured asymmetry. Large D-meson production asymmetries are found for large xF which is related to dominance of light quark/antiquark $q/\overline q \to D$ fragmentation over the standard c → D fragmentation. As a consequence, prompt atmospheric neutrino flux at high neutrino energies can be much larger than for the conventional c → D fragmentation. The latter can constitute a sizeable background for the cosmic neutrinos claimed to be observed recently by the IceCube Observatory.

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