A search for proton decay via p ¿ ¿+K0 in Super Kamiokande I A UC Irvine Ph.D. dissertation
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- Englisch ausgewählt
Fr. 91.90
inkl. gesetzl. MwSt.,
Beschreibung
Produktdetails
Einband
Taschenbuch
Erscheinungsdatum
07.04.2012
Verlag
LAP LAMBERT Academic PublishingSeitenzahl
188
Maße (L/B/H)
22/15/1.2 cm
Gewicht
298 g
Auflage
1. Auflage
Sprache
Englisch
ISBN
978-3-8473-0004-5
A search for p ¿ ¿+K0 was performed using the Super Kamiokande I (SK-I) data set with a live-time of 1489.2 days corresponding to a total exposure of 91.2 kt years. In addition to searching this decay mode via the p ¿ ¿+K0S channel, previously performed by Kobayashi using the SK-I data set, new event reconstruction was developed specifically to search for separated vertices characteristic of the p ¿ ¿+K0L channel. This new reconstruction takes advantage of the long lifetime of the K0L which results in a unique event signature in which there are two distinct vertices; one corresponding to the proton decay point and another at the K0L disappearance point. These are typically separated by about 2m in space and 20 ns in time. We did not observe statistically significant evidence for p ¿ ¿+K0 decay. Therefore, a lower limit on the proton partial lifetime, ¿/Bp¿¿+K0, of 1.1 × 10^33 years was obtained at 90% confidence level.
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