Chiral three-nucleon force and continuum for dripline nuclei and beyond

Ma, Y. Z.; Xu, F. R.; Coraggio, L.; Hu, B. S.; Li, J. G.; Fukui, T.; De Angelis, L.; Itaco, N.; Gargano, A.

doi:10.1016/j.physletb.2020.135257

Chiral three-nucleon force and continuum for dripline nuclei and beyond

Journal Article · Sun Mar 01 00:00:00 EST 2020 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2020.135257· OSTI ID:1801966

Ma, Y. Z. ^[1]; ^[2]; Coraggio, L. ^[3]; Hu, B. S. ^[2]; Li, J. G. ^[2]; Fukui, T. ^[3]; De Angelis, L. ^[3]; Itaco, N. ^[4]; Gargano, A. ^[5]

Peking Univ., Beijing (China). School of Physics, State Key Lab. of Nuclear Physics; OSTI
Peking Univ., Beijing (China). School of Physics, State Key Lab. of Nuclear Physics
Complesso Universitario di Monte S. Angelo, Napoli (Italy). Istituto Nazionale di Fisica Nucleare
Complesso Universitario di Monte S. Angelo, Napoli (Italy). Istituto Nazionale di Fisica Nucleare; Università degli Studi della Campania “Luigi Vanvitelli”, Caserta (Italy). Dipartimento di Matematica e Fisica
Università degli Studi della Campania “Luigi Vanvitelli”, Caserta (Italy). Dipartimento di Matematica e Fisica

Three-nucleon force and continuum play important roles in reproducing the properties of atomic nuclei around driplines. Therefore it is valuable to build up a theoretical framework where both effects can be taken into account to solve the nuclear Schrödinger equation. To this end, in this letter, we have expressed the chiral three-nucleon force within the continuum Berggren representation, so that bound, resonant and continuum states can be treated on an equal footing in the complex-momentum space. To reduce the model dimension and computational cost, the three-nucleon force is truncated at the normal-ordered two-body level and limited in the sd-shell model space, with the residual three-body term being neglected. We choose neutron-rich oxygen isotopes as the test ground because they have been well studied experimentally, with the neutron dripline determined. The calculations have been carried out within the Gamow shell model. The quality of our results in reproducing the properties of oxygen isotopes around the neutron dripline shows the relevance of the interplay between three-nucleon force and the coupling to continuum states. We also analyze the role played by the chiral three-nucleon force, by dissecting the contributions of the 2π exchange, 1π exchange and contact terms.

View Accepted Manuscript (DOE)

Research Organization:: Texas A & M Univ., Commerce, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0009971

OSTI ID:: 1801966

Journal Information:: Physics Letters. B, Journal Name: Physics Letters. B Journal Issue: C Vol. 802; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Perturbative Approach to Effective Shell-Model Hamiltonians and Operators Coraggio, Luigi; Itaco, Nunzio Frontiers in Physics, Vol. 8 https://doi.org/10.3389/fphy.2020.00345	journal	October 2020
Unbound spectra of neutron-rich oxygen isotopes predicted by the Gamow shell model Li, J. G.; Michel, N.; Zuo, W. arXiv https://doi.org/10.48550/arxiv.2103.01478	text	January 2021

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