Search for Neutral Q-balls in Super-Kamiokande II
The Super-Kamiokande Collaboration: Y. Takenaga, et al
TL;DR
This paper reports a search for neutral Q-balls in Super-Kamiokande II, aiming to detect pion signals from Q-ball interactions, but finds no candidates, setting upper flux limits.
Contribution
First search for neutral Q-balls in Super-Kamiokande II using successive contained pion event detection.
Findings
No candidate Q-ball events found.
Established upper limits on Q-ball flux.
Demonstrated detection method for Q-balls.
Abstract
A search for Q-balls induced groups of successive contained events has been carried out in Super-Kamiokande II with 541.7 days of live time. Neutral Q-balls would emit pions when colliding with nuclei, generating a signal of successive contained pion events along a track. No candidate for successive contained event groups has been found in Super-Kamiokande II, so upper limits on the possible flux of such Q-balls have been obtained.
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