Search for Neutrino Doublets and Triplets Using 11.4 yr of IceCube Data


Abbasi R., Ackermann M., Adams J., Agarwalla S. K., Aguilar J. A., Ahlers M., ...More

ASTROPHYSICAL JOURNAL, vol.981, no.2, 2025 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 981 Issue: 2
  • Publication Date: 2025
  • Doi Number: 10.3847/1538-4357/adb312
  • Journal Name: ASTROPHYSICAL JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, INSPEC, zbMATH, Directory of Open Access Journals, DIALNET
  • Middle East Technical University Affiliated: No

Abstract

We report a search for high-energy astrophysical neutrino multiplets, detections of multiple neutrino clusters in the same direction within 30 days, based on an analysis of 11.4 yr of IceCube data. A new search method optimized for transient neutrino emission with a monthly timescale is employed, providing a higher sensitivity to neutrino fluxes. This result is sensitive to neutrino transient emission, reaching per-flavor flux of approximately 10(-10) erg cm(-2) s(-1) from the Northern Sky in the energy range E greater than or similar to 50 TeV. The number of doublets and triplets identified in this search is compatible with the atmospheric background hypothesis, which leads us to set limits on the nature of neutrino transient sources with emission timescales of one month.