KM3NeT/ARCA sensitivity to transient neutrino sources

Abstract

The KM3NeT Collaboration is constructing a km 3 -volume neutrino telescope in the Mediterranean sea, called ARCA (Astroparticle Research with Cosmics in the Abyss), that will achieve an unprecedented sensitivity to high-energy cosmic neutrinos. This telescope will be able to reconstruct the arrival direction of the neutrinos with a precision of 0.1 • . The configuration of ARCA makes it sensitive to neutrinos in a wide energy range, from sub-TeV up to tens of PeV. Moreover, this detector has a large field of view and a very high duty cycle, allowing for full-sky (and all-flavours) searches. All these features make ARCA an excellent instrument to study transient neutrino sources. Atmospheric muons and neutrinos, produced by primary cosmic rays, constitute the main background for ARCA. This background can be several orders of magnitude higher than the expected cosmic neutrino flux. In this work, we introduce an event selection which reduces the background up to a negligible level inside the region of interest and within the search time window. The ARCA performance to detect a transient neutrino flux, including the effective area, sensitivity and discovery potential, are provided for a given test source, and for different time windows.

Science with Neutrino Telescopes in Spain

“…These contributions include, among others: the characterization of PMTs [10]; the design and construction of time and positioning calibration devices [11][12][13][14][15][16][17], acoustic instruments for R&D studies [18][19][20] and several contributions to electronics (the design and construction of electronic boards [21][22][23][24][25], the development of software and firmware and studies of electronics reliability [26,27]). On the physics side, the teams have participated in searches for neutrino point sources [28][29][30][31][32][33][34][35][36], diffuse fluxes [37,38], transient sources [39][40][41], multi-messenger astronomy [42][43][44][45], search for dark matter in the Sun [46][47][48][49] and in the Galactic Centre [50][51][52][53][54][55]<...>…”