| Literature DB >> 11736336 |
H Takahashi1, J K Ahn, H Akikawa, S Aoki, K Arai, S Y Bahk, K M Baik, B Bassalleck, J H Chung, M S Chung, D H Davis, T Fukuda, K Hoshino, A Ichikawa, M Ieiri, K Imai, Y H Iwata, Y S Iwata, H Kanda, M Kaneko, T Kawai, M Kawasaki, C O Kim, J Y Kim, S J Kim, S H Kim, Y Kondo, T Kouketsu, Y L Lee, J W McNabb, M Mitsuhara, Y Nagase, C Nagoshi, K Nakazawa, H Noumi, S Ogawa, H Okabe, K Oyama, H M Park, I G Park, J Parker, Y S Ra, J T Rhee, A Rusek, H Shibuya, K S Sim, P K Saha, D Seki, M Sekimoto, J S Song, T Takahashi, F Takeutchi, H Tanaka, K Tanida, J Tojo, H Torii, S Torikai, D N Tovee, N Ushida, K Yamamoto, N Yasuda, J T Yang, C J Yoon, C S Yoon, M Yosoi, T Yoshida, L Zhu.
Abstract
A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of ( 6)(LambdaLambda)He emitted from a Xi(-) hyperon nuclear capture at rest. The mass of ( 6)(LambdaLambda)He and the Lambda-Lambda interaction energy DeltaB(LambdaLambda) have been measured for the first time devoid of the ambiguities due to the possibilities of excited states. The value of DeltaB(LambdaLambda) is 1.01+/-0.20(+0.18)(-0.11) MeV. This demonstrates that the Lambda-Lambda interaction is weakly attractive.Year: 2001 PMID： 11736336 DOI： 10.1103/PhysRevLett.87.212502
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161