TY - JOUR
T1 - Search for the Lightest Double- Λ Hypernucleus, ΛΛ5 H, at J-PARC
AU - Fujioka, Hiroyuki
AU - Ajimura, Shuhei
AU - Fukuda, Tomokazu
AU - Gogami, Toshiyuki
AU - Hiyama, Emiko
AU - Morino, Yuhei
AU - Motoba, Toshio
AU - Nagae, Tomofumi
AU - Nagao, Sho
AU - Sakaue, Akane
AU - Takahashi, Toshiyuki
AU - Taki, Yosuke
AU - Tokiyasu, Atsushi O.
AU - Uchida, Makoto
AU - Yosoi, Masaru
N1 - Funding Information:
This work is supported by a research Grant in the natural sciences from the Mitsubishi Foundation and the RCNP Joint Usage Program at the Research Center for Nuclear Physics, Osaka University.
Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.
PY - 2021/9
Y1 - 2021/9
N2 - Investigations of double-Λ hypernuclei, which contain two Λ hyperons in a nucleus, provide valuable information on baryon–baryon interaction in the strangeness - 2 sector, such as the Λ –Λ interaction. Whereas several double-Λ hypernuclei have been discovered in nuclear-emulsion experiments, an experimental observation of ΛΛ5H is awaited. It is not only because ΛΛ5H is theoretically expected to be the lightest bound state, but also because Λ Λ –Ξ N coupling may play an important role in its structure. On the other hand, the coupling effect may be suppressed in ΛΛ6He.We propose an experiment to investigate ΛΛ5H at J-PARC. ΛΛ5H will be produced by a decay of a Ξ hypernucleus, Ξ7H, which can be produced by the 7Li (K-, K+) reaction. The mass of ΛΛ5H will be determined by means of decay pion spectroscopy; it can be calculated from the measured momentum of decay pions, owing to a two-body decay of ΛΛ5H.
AB - Investigations of double-Λ hypernuclei, which contain two Λ hyperons in a nucleus, provide valuable information on baryon–baryon interaction in the strangeness - 2 sector, such as the Λ –Λ interaction. Whereas several double-Λ hypernuclei have been discovered in nuclear-emulsion experiments, an experimental observation of ΛΛ5H is awaited. It is not only because ΛΛ5H is theoretically expected to be the lightest bound state, but also because Λ Λ –Ξ N coupling may play an important role in its structure. On the other hand, the coupling effect may be suppressed in ΛΛ6He.We propose an experiment to investigate ΛΛ5H at J-PARC. ΛΛ5H will be produced by a decay of a Ξ hypernucleus, Ξ7H, which can be produced by the 7Li (K-, K+) reaction. The mass of ΛΛ5H will be determined by means of decay pion spectroscopy; it can be calculated from the measured momentum of decay pions, owing to a two-body decay of ΛΛ5H.
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U2 - 10.1007/s00601-021-01635-y
DO - 10.1007/s00601-021-01635-y
M3 - Article
AN - SCOPUS:85112125452
VL - 62
JO - Few-Body Systems
JF - Few-Body Systems
SN - 0177-7963
IS - 3
M1 - 47
ER -