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

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

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.