Calabria, Nicola Fulvio (2022) Search for proton decay in Super-Kamiokande and perspectives in the Hyper-Kamiokande experiments. [Tesi di dottorato]
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| Item Type: | Tesi di dottorato |
|---|---|
| Resource language: | English |
| Title: | Search for proton decay in Super-Kamiokande and perspectives in the Hyper-Kamiokande experiments |
| Creators: | Creators Email Calabria, Nicola Fulvio nicolafulvio.calabria@gmail.com |
| Date: | 12 December 2022 |
| Number of Pages: | 158 |
| Institution: | Università degli Studi di Napoli Federico II |
| Department: | Fisica |
| Dottorato: | Fisica |
| Ciclo di dottorato: | 35 |
| Coordinatore del Corso di dottorato: | nome email Canale, Vincenzo vincenzo.canale@na.infn.it |
| Tutor: | nome email De Rosa, Gianfranca UNSPECIFIED |
| Date: | 12 December 2022 |
| Number of Pages: | 158 |
| Keywords: | Super-Kamiokande; Hyper-Kamiokande; proton decay; fiTQun; reconstruction algorithm; water Cherenkov; multi-PMT; mPMT; Cherenkov ring |
| Settori scientifico-disciplinari del MIUR: | Area 02 - Scienze fisiche > FIS/01 - Fisica sperimentale Area 02 - Scienze fisiche > FIS/04 - Fisica nucleare e subnucleare |
| Date Deposited: | 20 Dec 2022 14:12 |
| Last Modified: | 09 Apr 2025 14:14 |
| URI: | http://www.fedoa.unina.it/id/eprint/14658 |
Collection description
We searched for proton decay p -> \nu K^+ in 3244.4 days of data acquired by the Super-Kamiokande experiment, equivalent to an exposure of 200 kton*year: we found no data candidates. The new reconstruction algorithm we used (fiTQun) enabled us to reconstruct kaon kinematics and to develop a low-noise anaysis. Then, we checked the performance of fiTQun in reconstructing proton decay p -> e^+ \pi^0 simulated samples in Hyper-Kamiokande. We found that the introduction of multi-PMT photosensors significantly improves signal selection efficiency. Finally we tuned fiTQun ring counting parameters for Hyper-Kamiokande with the same simulated samples: we found a significant excess of events with 4 reconstructed rings.
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