| Autor: |
Sakuma, Fuminori, Ajimura, Shuhei, Asano, Hidemitsu, Beer, George, Berucci, Carolina, Bhang, Hyoungchan, Bragadireanu, Mario, Buehler, Paul, Busso, Luigi, Cargnelli, Michael, Choi, Seonho, Curceanu, Catalina, Enomoto, Shun, Fujioka, Hiroyuki, Fujiwara, Yuya, Fukuda, Tomokazu, Guaraldo, Carlo, Hashimoto, Tadashi, Hayano, Ryugo S., Hiraiwa, Toshihiko |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings; 2020, Vol. 2249 Issue 1, p1-10, 10p, 1 Diagram, 2 Charts, 4 Graphs |
| Abstrakt: |
The K¯NN bound system, symbolically denoted as "K−pp", is the simplest K¯-nuclear bound system which has been widely discussed as a consequence of the strongly attractive K¯N 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 K¯N interaction below the K¯+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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
