Speaker
Prof.
Chhanda Samanta
(Virginia Military Institue)
Description
Recent experiments have presented more accurate data on the ΛΛ-binding energies of a few ΛΛ- hypernuclei. This is important as the ΛΛ- bond energies (ΔBΛΛ) of double-Λ hypernuclei provide a measure of the in-medium strength of the ΛΛinteraction. A mass formula, optimized with the newly available ΛΛ binding energy data, is used to estimate the binding energy and bond energy over a wide range of hypernuclei. The ΔBΛΛ values calculated with this mass formula are in good agreement with the experimental data, predictions of the quark mean-field (QMF) model and the relativistic mean-field (RMF) model as well. The ΛΛ-bond energy is found to diminish with neutron numbers, approaching zero near the neutron-drip line. In this formalism, the calculated binding energy difference in mirror nuclei arises from the Coulomb contributions and can be utilized to extract the Coulomb-corrected charge symmetry breaking effect. Our calculations show the regions where more data are needed for light hypernuclei.
Primary author
Prof.
Chhanda Samanta
(Virginia Military Institue)
Co-author
Mr
Thomas A. Schmitt
(Virginia Military Institute)
