期刊
PHYSICS LETTERS B
卷 789, 期 -, 页码 620-625出版社
ELSEVIER
DOI: 10.1016/j.physletb.2018.12.058
关键词
Kaon; Strangeness; Mesonic nuclear bound state
资金
- MEXT [26800158, 17K05481, 26287057, 24105003, 14102005, 17070007, 18H05402]
- Ministero degli Affari Esteri e della Cooperazione Internazionale, Direzione Generale per la Promozione del Sistema Paese (MAECI), StrangeMatter project
- Grants-in-Aid for Scientific Research [17070007, 26287057, 17K05481, 26800158, 14102005, 18H05402] Funding Source: KAKEN
We observed a distinct peak in the Ap invariant mass spectrum of He-3(K-, Lambda p)n, well below m(K) + 2m(p), i.e., the mass threshold of the K- to be bound to two protons. By selecting a relatively large momentum transfer region q = 350 similar to 650 MeV/c, one can kinematically separate the peak from the quasi-free process, (K) over barN -> (K) over barN followed by the non-resonant absorption by the two spectator-nucleons (K) over bar NN -> Lambda N. We found that the simplest fit to the observed peak gives us a Breit-Wigner pole position at B-Kpp = 47 +/- 3 (stat.)(-6)(+3)(sys.) MeV having a width Gamma(Kpp) = 115 +/- 7 (stat.)(-20)(+10)(sys.) MeV, and the S-wave Gaussian reaction form-factor parameter Q(Kpp) = 381 +/- 14 (stat.)(-0)(+57)(sys.) MeV/c, as a new form of the nuclear bound system with strangeness - K pp. C) 2018 Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据