A Search for ϕ\phi Meson Nucleus Bound State Using Antiproton Annihilation on Nucleus

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12 GeV p + A ハンノウ オ モチイタ ファイ e+ e- オヨビ ファイ K+ K- チャンネル ノ ゲンシカク ブッシツチュウ ニ オケル ホウカイハバ ノ ヘンカ ニ ツイテ ノ ケンキュウ

京都大学0048新制・課程博士博士(理学)甲第13277号理博第3190号新制||理||1473(附属図書館)UT51-2007-H642京都大学大学院理学研究科物理学・宇宙物理学専攻(主査)教授 今井 憲一, 教授 笹尾 登, 准教授 中家 剛学位規則第4条第1項該当Doctor of ScienceKyoto UniversityDA

K - Pp bound system at J-PARC

The K̄NN bound system, symbolically denoted as "K-pp", is the simplest K̄-nuclear bound system which has been widely discussed as a consequence of the strongly attractive K̄N interaction in I = 0 channels. Many theoretical works have pointed out the existence of the "K-pp" bound system, but the calculated properties such as the binding energy and the width spread out due to the uncertainty of the K̄N interaction below the K̄+N mass threshold. Experimentally, there are several reports on observation of a "K-pp" candidate with the binding energy of around 100 MeV, however, no definitive evidence was available so far. At J-PARC, we conducted a experimental search for the "K-pp" bound system using K- + 3He reaction at 1.0 GeV/c where the "K-pp" is expected to be directly produced via the (K-, n) reaction. We finally observed a bound state below the K- +p+p mass threshold in the Λpn final state, which can be interpreted as the "K- pp" bound state. The possible existence of the "K- pp" state is discussed from both aspects of production and decay. © 2020 Author(s)

A Search for ϕ\phi Meson Nucleus Bound State Using Antiproton Annihilation on Nucleus

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Comparison of

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) 3ΛH reaction. In this contribution, we will demonstrate our capability to provide 3ΛH binding energy information by deriving the production cross section ratio, σ3ΛH/σ4ΛH. The production cross section data for 3ΛH and 4ΛH are already available as the pilot run of E73 experiment and data analysis is in progress

J-PARC hadron experimental facility extension project

The J-PARC Hadron Experimental Facility was constructed with an aim to explore the origin and evolution of matter in the universe through experiments with intense particle beams. In the past decade, many results from particle and nuclear physics experiments have been obtained at the present facility. To expand the physics programs to as yet unexplored regions, the extension project of the Hadron Experimental Facility has been extensively discussed. This contribution presents the physics of the extension of the Hadron Experimental Facility to resolve issues related to strangeness nuclear physics, hadron physics, and flavor physics