Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 853, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/2041-8213/aaa4f6
Keywords
astroparticle physics; neutrinos
Categories
Funding
- Centre National de la Recherche Scientifique (CNRS), France
- Commissariat a l'energie atomique et aux energies alternatives (CEA), France
- Commission Europeenne (FEDER fund), France
- Commission Europeenne (Marie Curie Program), France
- Institut Universitaire de France (IUF), France
- UnivEarthS Labex program at Sorbonne Paris Cite, France [ANR-10-LABX-0023, ANR-11-IDEX-0005-02]
- Labex OCEVU, France [ANR-11-LABX-0060]
- A*MIDEX project, France [ANR-11-IDEX-0001-02]
- Region Ile-de-France (DIM-ACAV), France
- Region Alsace (contrat CPER), France
- Region Provence-Alpes-Cote d'Azur, France
- Bundesministerium fur Bildung und Forschung (BMBF), Germany
- Istituto Nazionale di Fisica Nucleare (INFN), Italy
- Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO), the Netherlands
- Council of the President of the Russian Federation for young scientists and leading scientific schools supporting grants, Russia
- National Authority for Scientific Research (ANCS), Romania
- Ministerio de Economia y Competitividad (MINECO): Plan Estatal de Investigacion, Spain [FPA2015-65150-C3-1-P, FPA2015-65150-C3-2-P, FPA2015-65150-C3-3-P]
- Severo Ochoa Centre of Excellence and MultiDark Consolider (MINECO), Spain
- Prometeo program (Generalitat Valenciana), Spain
- Ministry of Higher Education, Scientific Research and Professional Training, Morocco
- IdEx program, France
- Grisolia program (Generalitat Valenciana), Spain
- Departement du Var and Ville de La Seyne-sur-Mer, France
Ask authors/readers for more resources
The ANTARES detector is at present the most sensitive neutrino telescope in the northern hemisphere. The highly significant cosmic neutrino excess observed by the Antarctic IceCube detector can be studied with ANTARES, exploiting its complementing field of view, exposure, and lower energy threshold. Searches for an all-flavor diffuse neutrino signal, covering nine years of ANTARES data taking, are presented in this Letter. Upward-going events are used to reduce the atmospheric muon background. This work includes for the first time in ANTARES both track-like (mainly nu mu) and shower-like (mainly nu(e)) events in this kind of analysis. Track-like events allow for an increase of the effective volume of the detector thanks to the long path traveled by muons in rock and/ or sea water. Shower-like events are well reconstructed only when the neutrino interaction vertex is close to, or inside, the instrumented volume. A mild excess of high-energy events over the expected background is observed in nine years of ANTARES data in both samples. The best fit for a single power-law cosmic neutrino spectrum, in terms of perflavor flux at 100 TeV, is Phi(1f)(0) (100 TeV) = (1.7 +/- 1.0) x 10(-18) GeV-1 cm(-2) s(-1) sr(-1) with spectral index Gamma = 2.4(-0.4)(+0.5) .The null cosmic flux assumption is rejected with a significance of 1.6 sigma .
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available