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Study of the elementary (K -, n) reactions to search for the K NN bound state via the 3He (K -, n) reaction at J-PARC

Yamaga, Takumi; Ajimura, S.; Beer, G.; Berucci, C.; Bhang, H.; Bragadireanu, M.; Buehler, P.; Busso, L.; Cargnelli, M. and Choi, S., et al. (2016) 16th International Conference on Hadron Spectroscopy, Hadron 2015 In XVIth International Conference on Hadron Spectroscopy, Hadron 2015 1735.
Abstract

We have searched for the simplest kaonic nuclear state, K̄NN, using the in-flight 3He (K-, n) reaction at the J-PARC hadron experimental facility. In the semi-inclusive neutron missing-mass spectrum at θnlab=0°, an excess of yield was observed just below the K- pp mass-threshold, which cannot be explained by any elementary reactions [PTEP 2015, 061D01]. To understand the missing-mass spectrum of 3He (K-, n) X, we investigated the elementary (K-, n) reactions using hydrogen and deuterium targets. The p (K-, n) X missing-mass spectrum was well described by the charge-exchange reaction. However, in the d (K-, n) X spectrum, we observed an excess of... (More)

We have searched for the simplest kaonic nuclear state, K̄NN, using the in-flight 3He (K-, n) reaction at the J-PARC hadron experimental facility. In the semi-inclusive neutron missing-mass spectrum at θnlab=0°, an excess of yield was observed just below the K- pp mass-threshold, which cannot be explained by any elementary reactions [PTEP 2015, 061D01]. To understand the missing-mass spectrum of 3He (K-, n) X, we investigated the elementary (K-, n) reactions using hydrogen and deuterium targets. The p (K-, n) X missing-mass spectrum was well described by the charge-exchange reaction. However, in the d (K-, n) X spectrum, we observed an excess of yield just below the K- p mass-threshold, which was similar to that in the 3He (K-, n) X spectrum.

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published
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XVIth International Conference on Hadron Spectroscopy, Hadron 2015
volume
1735
publisher
American Institute of Physics Inc.
conference name
16th International Conference on Hadron Spectroscopy, Hadron 2015
external identifiers
  • scopus:84984539759
ISBN
9780735413894
DOI
10.1063/1.4949411
language
English
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no
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ecdad356-2e09-4549-a270-7886f03b4297
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2017-01-27 11:43:41
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2017-01-27 11:43:41
@inproceedings{ecdad356-2e09-4549-a270-7886f03b4297,
  abstract     = {<p>We have searched for the simplest kaonic nuclear state, K̄NN, using the in-flight <sup>3</sup>He (K<sup>-</sup>, n) reaction at the J-PARC hadron experimental facility. In the semi-inclusive neutron missing-mass spectrum at θnlab=0°, an excess of yield was observed just below the K<sup>-</sup> pp mass-threshold, which cannot be explained by any elementary reactions [PTEP 2015, 061D01]. To understand the missing-mass spectrum of <sup>3</sup>He (K<sup>-</sup>, n) X, we investigated the elementary (K<sup>-</sup>, n) reactions using hydrogen and deuterium targets. The p (K<sup>-</sup>, n) X missing-mass spectrum was well described by the charge-exchange reaction. However, in the d (K<sup>-</sup>, n) X spectrum, we observed an excess of yield just below the K<sup>-</sup> p mass-threshold, which was similar to that in the <sup>3</sup>He (K<sup>-</sup>, n) X spectrum.</p>},
  author       = {Yamaga, Takumi and Ajimura, S. and Beer, G. and Berucci, C. and Bhang, H. and Bragadireanu, M. and Buehler, P. and Busso, L. and Cargnelli, M. and Choi, S. and Curceanu, C. and Enomoto, S. and Faso, D. and Fujioka, H. and Fujiwara, Y. and Fukuda, T. and Guaraldo, C. and Hashimoto, T. and Hayano, R. S. and Hiraiwa, T. and Iio, M. and Iliescu, M. and Inoue, K. and Ishiguro, Y. and Ishikawa, T. and Ishimoto, S. and Ishiwatari, T. and Itahashi, K. and Iwai, M. and Iwasaki, M. and Kanno, K. and Kato, K. and Kato, Y. and Kawasaki, S. and Kienle, P. and Kim, T. and Kou, H. and Ma, Y. and Marton, J. and Matsuda, Y. and Mizoi, Y. and Morra, O. and Nagae, T. and Noumi, H. and Ohnishi, H. and Okada, S. and Outa, H. and Piscicchia, K. and Vidal, A. Romero and Sada, Y. and Sakaguchi, A. and Sakuma, F. and Sato, M. and Scordo, A. and Sekimoto, M. and Shi, H. and Shirotori, K. and Sirghi, D. and Sirghi, F. and Suzuki, K. and Suzuki, S. and Suzuki, T. and Tanida, K. and Tatsuno, H. and Tokuda, M. and Tomono, D. and Toyoda, A. and Tsukada, K. and Doce, O. Vazquez and Widmann, E. and Wuenschek, B. K. and Yamazaki, T. and Yim, H. and Zhang, Q. and Zmeskal, J.},
  booktitle    = {XVIth International Conference on Hadron Spectroscopy, Hadron 2015},
  isbn         = {9780735413894},
  language     = {eng},
  month        = {05},
  publisher    = {American Institute of Physics Inc.},
  title        = {Study of the elementary (K <sup>-</sup>, n) reactions to search for the K  NN bound state via the <sup>3</sup>He (K <sup>-</sup>, n) reaction at J-PARC},
  url          = {http://dx.doi.org/10.1063/1.4949411},
  volume       = {1735},
  year         = {2016},
}