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- Title
Search for the deeply bound K<sup>-</sup> pp state from the semi-inclusive forward-neutron spectrum in the in-flight K<sup>-</sup> reaction on helium-3.
- Authors
Hashimoto, T.; Ajimura, S.; Beer, G.; Bhang, H.; Bragadireanu, M.; Busso, L.; Cargnelli, M.; Choi, S.; Curceanu, C.; Enomoto, S.; Faso, D.; Fujioka, H.; Fujiwara, Y.; Fukuda, T.; Guaraldo, C.; Hayano, R. S.; Hiraiwa, T.; Iio, M.; Iliescu, M.; Inoue, K.
- Abstract
An experiment to search for the K- pp bound state was performed via the in-flight 3He(K- , n) reaction using 5.3 × 109 kaons at 1GeV/c at the J-PARC hadron experimental facility. In the semi-inclusive neutron missing-mass spectrum at θlabn = 0°, no significant peak was observed in the region corresponding to K- pp binding energy larger than 80MeV, where a bump structure has been reported in the Δp final state in different reactions. Assuming the state to be isotropically decaying into Δp, mass-dependent upper limits on the production cross section were determined to be 30-180, 70-250, and 100-270μb/sr, for the natural widths of 20, 60, and 100MeV, respectively, at 95% confidence level.
- Publication
Progress of Theoretical & Experimental Physics: PTEP, 2015, Vol 2015, Issue 6, p1
- ISSN
2050-3911
- Publication type
Article
- DOI
10.1093/ptep/ptv076