Light Kaonic Nuclei at J-PARC

The possible existence of deeply bound $\bar K$-nucleus bound states (kaonic nuclei) has been widely discussed as a consequence of the strongly attractive $\bar K N$ interaction in I = 0 channels. For the simplest kaonic nucleus, $\bar KNN$, we observed a significant peak structure that can be interpreted as the ``$K^-pp$’’ bound state using the $^3$He$(K^-,N)$ reactions at J-PARC. To further understand the kaonic nuclei, we have proposed and prepared an experiment to precisely measure the $\bar K NNN$ system using the $^4$He$(K^-,N)$ reactions as a first step towards a comprehensive study of the light kaonic nuclei from ``$\bar K N$'' (=$\Lambda$(1405)) to ``$\bar K NNNN$''. Through the experiments and detailed theoretical calculations, we will unravel the nature of the kaonic nuclei from the changes in their properties with increasing mass number~$A$.

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Publication Details

Published
2025-02-07
DOI
https://doi.org/10.22323/1.465.0211
Primary Topic
Particle physics theoretical and experimental studies
Type
article
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article

Light Kaonic Nuclei at J-PARC

T. Yamaga, Francesco Sgaramella, E. Widmann, Catalina Curceanu et al.
Particle physics theoretical and experimental studies
article

Light Kaonic Nuclei at J-PARC

T. Yamaga, Francesco Sgaramella, E. Widmann, Catalina Curceanu, Sachihiro Suzuki, Y. Kimura, K. Shirotori, F. Sakuma, T. Nagae, K. Ozawa, Masaya Oonaka, A. Clozza, Simone Manti, Shingo Kawasaki, M. Iliescu, Shunsaku Okada, M. Bazzi, A. Scordo, Y. Makida, M. Iwasaki, T. Nanamura, K. Tanida, M. Tsuruta, Iio M, R. Murayama, H. Ohhata, K. Toho, K. Itahashi, Florin Catalin Sirghi, G. Kojima, H. Noumi, K. Suzuki, N. Sumi, C. Guaraldo, Hiroyuki Fujioka, Ye Ma, Kentaro Inoue, Johann Zmeskal, S. Sasaki, S. Ishimoto, T. Hashimoto, P. Buehler, M. Yoshida, D. Sirghi, Kenichi Sasaki, Hideomi Ohnishi, Takaya Akaishi
article en

Abstract

The possible existence of deeply bound $\bar K$-nucleus bound states (kaonic nuclei) has been widely discussed as a consequence of the strongly attractive $\bar K N$ interaction in I = 0 channels. For the simplest kaonic nucleus, $\bar KNN$, we observed a significant peak structure that can be interpreted as the ``$K^-pp$’’ bound state using the $^3$He$(K^-,N)$ reactions at J-PARC. To further understand the kaonic nuclei, we have proposed and prepared an experiment to precisely measure the $\bar K NNN$ system using the $^4$He$(K^-,N)$ reactions as a first step towards a comprehensive study of the light kaonic nuclei from ``$\bar K N$'' (=$\Lambda$(1405)) to ``$\bar K NNNN$''. Through the experiments and detailed theoretical calculations, we will unravel the nature of the kaonic nuclei from the changes in their properties with increasing mass number~$A$.

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