학술논문
Evidence for 6{\Lambda}H
Document Type
Working Paper
Author
Agnello, M.; Benussi, L.; Bertani, M.; Bhang, H. C.; Bonomi, G.; Botta, E.; Bregant, M.; Bressani, T.; Bufalino, S.; Busso, L.; Calvo, D.; Camerini, P.; Dalena, B.; De Mori, F.; D'Erasmo, G.; Fabbri, F. L.; Feliciello, A.; Filippi, A.; Fiore, E. M.; Fontana, A.; Fujioka, H.; Genova, P.; Gianotti, P.; Grion, N.; Lucherini, V.; Marcello, S.; Mirfakhrai, N.; Moia, F.; Morra, O.; Nagae, T.; Outa, H.; Pantaleo, A.; Paticchio, V.; Piano, S.; Rui, R.; Simonetti, G.; Wheadon, R.; Zenoni, A.; Gal, A.
Source
Phys. Rev. Lett. 108 (2012) 042501
Subject
Language
Abstract
Evidence for the neutron-rich hypernucleus 6{\Lambda}H is presented from the FINUDA experiment at DA{\Phi}NE, Frascati, studying ({\pi}+, {\pi}-) pairs in coincidence from the K- +6Li \rightarrow 6 H+{\pi}+ production reaction followed by 6{\Lambda}H \rightarrow 6He + {\pi}- weak decay. The production rate of 6{\Lambda}H undergoing this two-body {\pi}- decay is determined to be (2.9\pm2.0)\cdot10-6/K-. Its binding energy, evaluated jointly from production and decay, is B{\Lambda}(6{\Lambda}H) = (4.0\pm1.1) MeV with respect to 5H+{\Lambda}. A systematic difference of (0.98 \pm 0.74) MeV between B{\Lambda} values derived separately from decay and from production is tentatively assigned to the 6{\Lambda}H 0+g.s. \rightarrow 1+ excitation.
Comment: 5 pages, 3 figures
Comment: 5 pages, 3 figures