XVIII International Conference on Topics in Astroparticle and Underground Physics (TAUP 2023)

Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment

28 Aug 2023, 14:30

15m

Hörsaal 21 lecture hall (University of Vienna)

Parallel talk Neutrino physics and astrophysics Neutrino physics and astrophysics

Speaker

Seiya Sakai (Okayama University, Japan)

Description

In July 2020, we loaded 0.011% of gadolinium in Super-Kamiokande (SK) to enhance the detection efficiency of neutron signals and restarted the observation as the “SK-Gd experiment”. Now we are aiming to observe the Supernova Relic Neutrinos (SRNs) for the first time all over the world in the SK-Gd experiment. One of the main backgrounds in the SRNs search is the atmospheric neutrino-oxygen neutral-current quasielastic (NCQE) reactions. To discover the SRNs, it is essential to understand the neutrino-oxygen NCQE cross section and estimate the backgrounds more precisely. In this talk, we report the first result of the measurement of the neutrino-oxygen NCQE cross section using atmospheric neutrinos in the SK-Gd experiment and the consideration.

Presentation materials

TAUP_2023_Sakai.pdf