Evidence for 6{\Lambda}H
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.
Keywords
Cite
@article{arxiv.1112.4529,
title = {Evidence for 6{\Lambda}H},
author = {M. Agnello and L. Benussi and M. Bertani and H. C. Bhang and G. Bonomi and E. Botta and M. Bregant and T. Bressani and S. Bufalino and L. Busso and D. Calvo and P. Camerini and B. Dalena and F. De Mori and G. D'Erasmo and F. L. Fabbri and A. Feliciello and A. Filippi and E. M. Fiore and A. Fontana and H. Fujioka and P. Genova and P. Gianotti and N. Grion and V. Lucherini and S. Marcello and N. Mirfakhrai and F. Moia and O. Morra and T. Nagae and H. Outa and A. Pantaleo and V. Paticchio and S. Piano and R. Rui and G. Simonetti and R. Wheadon and A. Zenoni and A. Gal},
journal= {arXiv preprint arXiv:1112.4529},
year = {2015}
}
Comments
5 pages, 3 figures