A search for deeply-bound kaonic nuclear states at J-PARC

S. Ajimura¹, G. Beer², H. Bhang³, M. Bragadireanu^7,17, P. Buehler⁴, L. Busso^5,6, M. Cargnelli⁴, S. Choi³, C. Curceanu⁷, S. Enomoto⁸, D. Faso^5,6, H. Fujioka⁹, Y. Fujiwara¹⁰, T. Fukuda¹¹, Y. Fukuda¹², C. Guaraldo⁷, T. Hashimoto¹⁰, R.S. Hayano¹⁰, T. Hiraiwa⁹, M. Iio¹³, M. Iliescu⁷, K. Inoue⁸, T. Ishikawa², S. Ishimoto¹⁴, T. Ishiwatari⁴, K. Itahashi¹³, M. Iwai¹⁴, M. Iwasaki^12,13, P. Kienle^4,15, H. Kou¹², J. Marton⁴, Y. Matsuda¹⁶, Y. Mizoi¹¹, O. Morra⁵, T. Nagae⁹, H. Noumi¹, H. Ohnishi¹³, S. Okada⁷, H. Outa¹³, D. Pietreanu⁷, Y. Sada⁹, A. Sakaguchi⁸, F. Sakuma¹³, M. Sato¹⁰, M. Sekimoto¹⁴, D. Sirghi^7,17, F. Sirghi^7,17, K. Suzuki⁴, S. Suzuki¹⁴, T. Suzuki¹⁰, H. Tatsuno¹⁰, M. Tokuda¹², D. Tomono¹³, A. Toyoda¹⁴, K. Tsukada¹³, E. Widmann⁴, T. Yamazaki^10,13, H. Yim³ and J. Zmeskal⁴

¹ Research Center for Nuclear Physics (RCNP), Osaka University, Osaka, 567-0047, Japan
² Department of Physics and Astronomy, University of Victoria, Victoria BC V8W 3P6, Canada
³ Department of Physics, Seoul National University, Seoul, 151-742, South Korea
⁴ Stefan-Meyer-Institut für subatomare Physik, A-1090 Vienna, Austria
⁵ INFN Sezione di Torino, Torino, Italy
⁶ Dipartimento di Fisica Generale, Universita’ di Torino, Torino, Italy
⁷ Laboratori Nazionali di Frascati dell’ INFN, I-00044 Frascati, Italy
⁸ Department of Physics, Osaka University, Osaka, 560-0043, Japan
⁹ Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
¹⁰ Department of Physics, The University of Tokyo, Tokyo, 113-0033, Japan
¹¹ Laboratory of Physics, Osaka Electro-Communication University, Osaka, 572-8530, Japan
¹² Department of Physics, Tokyo Institute of Technology, Tokyo, 152-8551, Japan
¹³ RIKEN Nishina Center, RIKEN, Saitama, 351-0198, Japan
¹⁴ High Energy Accelerator Research Organization (KEK), Ibaraki, 305-0801, Japan
¹⁵ Technische Universiat München, D-85748, Garching, Germany
¹⁶ Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, 153-8902, Japan
¹⁷ National Institute of Physics and Nuclear Engineering - IFIN HH, Romania

Published online: 12 April 2010

Abstract

The J-PARC E15 experiment will be performed to search for the simplest kaonic nuclear bound state, K⁻ pp, by the in-flight ³He(K⁻,n) reaction. The exclusive measurement can be performed by a simultaneous measurement of the missing mass using the primary neutron and the invariant mass via the expected decay, K⁻ pp → Λp → pπ⁻ p. In this report, an overview of the experiment and the preparation status are presented.