Search for evidence ofΛ3nby observingd+π−andt+π−final states in the reaction of6Li+12C at2AGeV
| العنوان: | Search for evidence ofΛ3nby observingd+π−andt+π−final states in the reaction of6Li+12C at2AGeV |
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| المؤلفون: | J. Hoffmann, T. Takahashi, Z.S. Ketenci, S. Minami, C. Caesar, S. Erturk, C. J. Schmidt, S. Ajimura, S. Bianchin, Tsuneo Fukuda, Wolfgang Ott, J. Pochodzalla, Yutaka Mizoi, C. Ayerbe Gayoso, A. Le Fèvre, Thomas Aumann, C. Rappold, Aya Sakaguchi, M. Sekimoto, Yu-Gang Ma, F. E. Maas, M. Kavatsyuk, S. K. Kim, O. Bertini, D. Nakajima, G. Ickert, Eunji Kim, C. J. Yoon, S. Voltz, B. Göküzüm, L. Nungesser, V. Bozkurt, Kenichi Yoshida, T. Saito, W. Trautmann, K. Koch, Min-Hye Kim, E. Guliev, Hiroshi Tamura, Ganesh Jagannath Tambave, D. Khaneft, P. Achenbach, B. Özel-Tashenov, H. C. Bhang, N. Kurz, Herbert A. Simon |
| المصدر: | Physical Review C. 88 |
| بيانات النشر: | American Physical Society (APS), 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Physics, Nuclear and High Energy Physics, Particle physics, Bound state, Hyperon, Production (computer science), Invariant mass |
| الوصف: | The experimental data obtained from the reaction of ${}^{6}$Li projectiles at 2$A$ GeV on a fixed graphite target were analyzed to study the invariant mass distributions of $d+{\ensuremath{\pi}}^{\ensuremath{-}}$ and $t+{\ensuremath{\pi}}^{\ensuremath{-}}$. Indications of a signal in the $d+{\ensuremath{\pi}}^{\ensuremath{-}}$ and $t+{\ensuremath{\pi}}^{\ensuremath{-}}$ invariant mass distributions were observed with significances of 5.3 $\ensuremath{\sigma}$ and 5.0 $\ensuremath{\sigma}$, respectively, when including the production target, and 3.7 $\ensuremath{\sigma}$ and 5.2 $\ensuremath{\sigma}$, respectively, when excluding the target. The estimated mean values of the invariant mass for $d+{\ensuremath{\pi}}^{\ensuremath{-}}$ and $t+{\ensuremath{\pi}}^{\ensuremath{-}}$ signal were 2059.3 $\ifmmode\pm\else\textpm\fi{}$ 1.3 $\ifmmode\pm\else\textpm\fi{}$ 1.7 MeV/c${}^{2}$ and 2993.7 $\ifmmode\pm\else\textpm\fi{}$ 1.3 $\ifmmode\pm\else\textpm\fi{}$ 0.6 MeV/c${}^{2}$ respectively. The lifetime estimation of the possible bound states yielding to $d+{\ensuremath{\pi}}^{\ensuremath{-}}$ and $t+{\ensuremath{\pi}}^{\ensuremath{-}}$ final states were deduced to be as ${181}_{\ensuremath{-}24}^{+30}\ifmmode\pm\else\textpm\fi{}25$ ps and ${190}_{\ensuremath{-}35}^{+47}\ifmmode\pm\else\textpm\fi{}36$ ps, respectively. Those final states may be interpreted as the two-body and three-body decay modes of a neutral bound state of two neutrons and a $\ensuremath{\Lambda}$ hyperon, ${}_{\ensuremath{\Lambda}}^{\phantom{\rule{0.16em}{0ex}}3}n$. |
| تدمد: | 1089-490X 0556-2813 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::d4fbbc3dc514dc856e3197184756bbf2 https://doi.org/10.1103/physrevc.88.041001 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........d4fbbc3dc514dc856e3197184756bbf2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1089490X 05562813 |
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