Comparison of ³_ΛH/⁴_ΛH production cross-section via (K⁻, π⁰) reaction at J-PARC

¹ Department of Physics, Osaka University, 560-0043, Toyonaka, Japan
² RIKEN Cluster for Pioneering Research, RIKEN, 351-0198, Wako, Japan
³ Institute of Modern Physics, 730000, Gansu, China
⁴ Laboratori Nazionali di Frascati dell’ INFN, I-00044, Frascati, Italy
⁵ ASRC, Japan Atomic Energy Agency, 319-1195, Tokai, Japan
⁶ Research Center for Nuclear Physics (RCNP), Osaka University, 567-0047, Suita, Japan
⁷ High Energy Accelerator Research Organization (KEK), 305-0801, Tsukuba, Japan
⁸ Research Center for Electron Photon science (ELPH), Tohoku University, 982-0826, Sendai, Japan
⁹ Engineering Science Laboratory, Chubu University, 487-8501, Kasugai, Japan
¹⁰ CENTRO FERMI - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, 00184 Rome, Italy
¹¹ Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), Magurele, Romania
¹² School of Nuclear Science and Technology, Lanzhou University, 730000, Gansu, China
¹³ School of Physics and Astronomy, Sun Yat-sen University, Zhuhai 519082, China
¹⁴ Center for the Study of Higher Education and Global Admissions(CHEGA), Osaka University, 560-0043, Toyonaka, Japan

^* e-mail: akaishi@ne.phys.sci.oska-u.ac.jp

Published online: 9 November 2022

Abstract

Recent heavy-ion collision experiments reported a surprisingly short lifetime for the hypertriton, which has been recognized as the hypertriton lifetime puzzle. Our J-PARC E73 experiment contributes to solve this puzzle with an independent experimental method by employing ³He(K⁻, π⁰) ³_ΛH reaction. In this contribution, we will demonstrate our capability to provide ³_ΛH binding energy information by deriving the production cross section ratio, σ_³ΛH/σ_⁴ΛH. The production cross section data for ³_ΛH and ⁴_ΛH are already available as the pilot run of E73 experiment and data analysis is in progress.