Naslov
Search for tau neutrinos with the MAGIC telescopes: improving selection criteria
(Search for tau neutrinos with the MAGIC telescopes: improving selection criteria*)

Autori
Manganaro, Marina ; Kardum, Leonora ; Bernardini, Elisa ; Doro, Michele ; Gora, Dariusz ; Micanović, Saša ; Terzić, Tomislav ; Will, Martin

Kolaboracija
MAGIC Collaboration

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
EPJ Web of Conferences / - : EDP Sciences, 2019

Skup
7th Roma International Conference on Astroparticle Physics (RICAP18)

Mjesto i datum
Rim, Italija, 04.09.2018. - 07.09.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
VHE gamma-rays ; tau neutrino

Sažetak
MAGIC, a system of two Cherenkov telescopes located at the Roque de los Muchachos Observatory (2200 a.s.l.) in the Canary Island of La Palma, has lately been engaged in an unconventional task: the search for a signature of particle showers induced by earth-skimming cosmic tau neutrinos arising from the ocean, in the PeV to EeV energy range. When pointing at the sea, the MAGIC telescopes can collect data in a range of about 5 deg in zenith and 80 deg in azimuth: the analysis of the shower images from ~30 hours of data, together with the simulations of upward-going tau neutrino showers, shows that the air showers induced by tau neutrinos can be discriminated from the hadronic background coming from a similar direction. We have calculated the point source acceptance and the expected event rates, assuming an incoming v_tau flux consistent with IceCube measurements, and for a sample of generic neutrino fluxes from photohadronic interactions in AGNs and GRBs. A 90% C.L. upper limit on the tau-neutrino point source flux of 2.0 × 10–4 GeV cm–2 s–1 has been obtained. The presented results can also be important for future Cherenkov experiments such as the Cherenkov Telescope Array. This next generation ground-based observatory can have a much better possibility to detect v_tau, given its larger FOV and much larger effective area.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA