We present an ab initio study of the isoscalar monopole excitations of 4He using different realistic nuclear interactions, including modern effective field theory potentials. In particular we concentrate on the transition form factor FM to the narrow 0+ resonance close to threshold. FM exhibits a strong potential model dependence, and can serve as a kind of prism to distinguish among different nuclear force models. Compared to the measurements obtained from inelastic electron scattering off 4He, one finds that the state-of-the-art theoretical transition form factors are at variance with experimental data, especially in the case of effective field theory potentials. We discuss some possible reasons for such a discrepancy, which still remains a puzzle.

Isoscalar Monopole Resonance of the Alpha Particle: A Prism to Nuclear Hamiltonians / Bacca, Sonia; N., Barnea; Leidemann, Winfried; Orlandini, Giuseppina. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 2013 Vol 110:(2013), pp. 042503-1-042503-5. [10.1103/PhysRevLett.110.042503]

Isoscalar Monopole Resonance of the Alpha Particle: A Prism to Nuclear Hamiltonians

Bacca, Sonia;Leidemann, Winfried;Orlandini, Giuseppina
2013-01-01

Abstract

We present an ab initio study of the isoscalar monopole excitations of 4He using different realistic nuclear interactions, including modern effective field theory potentials. In particular we concentrate on the transition form factor FM to the narrow 0+ resonance close to threshold. FM exhibits a strong potential model dependence, and can serve as a kind of prism to distinguish among different nuclear force models. Compared to the measurements obtained from inelastic electron scattering off 4He, one finds that the state-of-the-art theoretical transition form factors are at variance with experimental data, especially in the case of effective field theory potentials. We discuss some possible reasons for such a discrepancy, which still remains a puzzle.
2013
Bacca, Sonia; N., Barnea; Leidemann, Winfried; Orlandini, Giuseppina
Isoscalar Monopole Resonance of the Alpha Particle: A Prism to Nuclear Hamiltonians / Bacca, Sonia; N., Barnea; Leidemann, Winfried; Orlandini, Giuseppina. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 2013 Vol 110:(2013), pp. 042503-1-042503-5. [10.1103/PhysRevLett.110.042503]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/96615
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