Evidence for the neutron-rich hypernucleus 6 H is presented from the FINUDA experiment at DANE, Frascati, studying ðþ; Þ pairs in coincidence from the K stop þ 6Li ! 6 H þ þ production reaction followed by 6 H ! 6He þ weak decay. The production rate of 6 H undergoing this two-body decay is determined to be ð2:9 2:0Þ 106=K stop. Its binding energy, evaluated jointly from production and decay, is B ð6 HÞ ¼ ð4:0 1:1Þ MeV with respect to 5H þ . A systematic difference of ð0:98 0:74Þ MeV between B values derived separately from decay and from production is tentatively assigned to the 6 H 0þ g:s: ! 1þ excitation.
Evidence for Heavy Hyperhydrogen 6H / M., Agnello; L., Benussi; M., Bertani; H. C., Bhang; G., Bonomi; E., Botta; Bregant, Marco; T., Bressani; S., Bufalino; L., Busso; D., Calvo; Camerini, Paolo; B., Dalena; F., De Mori; G., D’Erasmo; F. L., Fabbri; A., Feliciello; A., Filippi; E. M., Fiore; A., Fontana; H., Fujioka; P., Genova; P., Gianotti; N., Grion; V., Lucherini; S., Marcello; N., Mirfakhrai; F., Moia; O., Morra; T., Nagae; H., Outa; A., Pantaleo; V., Paticchio; Piano, Stefano; Rui, Rinaldo; G., Simonetti; R., Wheadon; A., Zenoni. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 108:(2012), pp. 042501-1-042501-5. [10.1103/PhysRevLett.108.042501]
Evidence for Heavy Hyperhydrogen 6H
BREGANT, MARCO;CAMERINI, Paolo;PIANO, STEFANO;RUI, RINALDO;
2012-01-01
Abstract
Evidence for the neutron-rich hypernucleus 6 H is presented from the FINUDA experiment at DANE, Frascati, studying ðþ; Þ pairs in coincidence from the K stop þ 6Li ! 6 H þ þ production reaction followed by 6 H ! 6He þ weak decay. The production rate of 6 H undergoing this two-body decay is determined to be ð2:9 2:0Þ 106=K stop. Its binding energy, evaluated jointly from production and decay, is B ð6 HÞ ¼ ð4:0 1:1Þ MeV with respect to 5H þ . A systematic difference of ð0:98 0:74Þ MeV between B values derived separately from decay and from production is tentatively assigned to the 6 H 0þ g:s: ! 1þ excitation.Pubblicazioni consigliate
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