Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 80: Neutrinophysik VIII

T 80.5: Vortrag

Donnerstag, 22. März 2018, 17:35–17:50, Z6 - HS 0.001

Determining the neutrino mass with the Megaton Ice Cherenkov Array (MICA) — •Elisa Lohfink, Maike Jung, Thomas Ehrhardt, Lutz Köpke, and Sebastian Böser — Johannes Gutenberg-Universität Mainz, Mainz, Germany

The Megaton Ice Cherenkov Array (MICA) is an envisioned low-energy extension of the IceCube neutrino telescope. It aims at the detection of extragalactic supernovae at distances of up to 10 Mpc through a large effective volume and a sensor spacing optimized for MeV neutrinos. This results in a supernova detection rate at the order of one per year, as compared to the rate of galactic supernovae of one per century to which existing detectors are sensitive. In addition to the rich information on supernova- and astrophysics that could be obtained with such a detector we show the possibility to determine the neutrino mass using mass-dependent delays in the neutrino time-of-flight. For supernova neutrinos, this causes an energy- and distance-dependent shift of the arrival time spectrum. With the SN detection range of MICA of up to 10 Mpc, this effect will be significantly enhanced compared to galactic supernovae. Using only data from MICA, the biggest uncertainty stems from the exact explosion time and onset of the neutrino flux. External information on the explosion time, e.g. from future gravitational wave detectors, would therefore further improve the obtained mass limits especially for distant supernovae.