Evaluation of the hyperon binding energy via statistical production of hypernuclei

Abstract

In nuclear reactions of high energy one can simultaneously produce a lot of hypernuclei after the capture of hyperons by nuclear residues. We consider statistical disintegration of such hypernuclear systems and the connection of fragment production with the binding energies of hyperons. It is demonstrated that the hyperon binding energies can be effectively evaluated from the yields of different isotopes of hypernuclei. The double ratio method is suggested for this purpose. The advantage of this procedure is its universality and the possibility to involve many different isotopes. This method can also be applied for multi-strange nuclei, which binding energies were very difficult to measure in previous hypernuclear experiments.

On the survey of nuclei and hypernuclei in multifragmentation

“…Our method is independent from the theoretical assumptions on the hypernuclei masses, but it relies on the fragment yields obtained in the multifragmentation reactions [36]. Primary and cold fragments can be found in the freeze-out volume, and these possibilities are strictly related to the production mechanisms.…”

On survey of nuclei and hypernuclei in multifragmentation

“…Our method is independent from the theoretical assumptions on the hypernuclei masses, but it relies on the fragment yields obtained in the multifragmentation reactions [36]. Yield ratios of the produced fragments, 3 He/ 4 He (H 0 =0) and 3 H Λ / 4 H Λ (H 0 =2 and 4) as a function of the excitation energy, for initial nuclei A 0 =100, Z 0 =40 (top panel) and A 0 =200, Z 0 =80 (bottom panel).…”