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Nuclear Experiment

arXiv:2005.07837 (nucl-ex)
[Submitted on 16 May 2020 (v1), last revised 20 Jan 2021 (this version, v2)]

Title:Role of chiral two-body currents in $^6$Li magnetic properties in light of a new precision measurement with the relative self-absorption technique

Authors:U. Friman-Gayer, C. Romig, T. Hüther, K. Albe, S. Bacca, T. Beck, M. Berger, J. Birkhan, K. Hebeler, O. J. Hernandez, J. Isaak, S. König, N. Pietralla, P. C. Ries, J. Rohrer, R. Roth, D. Savran, M. Scheck, A. Schwenk, R. Seutin, V. Werner
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Abstract:A direct measurement of the decay width of the excited $0^+_1$ state of $^6$Li using the relative self-absorption technique is reported. Our value of $\Gamma_{\gamma, 0^+_1 \to 1^+_1} = 8.17(14)_\mathrm{stat.}(11)_\mathrm{syst.} \mathrm{eV}$ provides sufficiently low experimental uncertainties to test modern theories of nuclear forces. The corresponding transition rate is compared to the results of ab initio calculations based on chiral effective field theory that take into account contributions to the magnetic dipole operator beyond leading order. This enables a precision test of the impact of two-body currents that enter at next-to-leading order.
Comments: 7 pages, 3 figures
Subjects: Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
Cite as: arXiv:2005.07837 [nucl-ex]
  (or arXiv:2005.07837v2 [nucl-ex] for this version)
  https://doi.org/10.48550/arXiv.2005.07837
Journal reference: Phys. Rev. Lett. 126, 102501 (2021)
Related DOI: https://doi.org/10.1103/PhysRevLett.126.102501

Submission history

From: Udo Friman-Gayer [view email]
[v1] Sat, 16 May 2020 00:50:26 UTC (1,187 KB)
[v2] Wed, 20 Jan 2021 20:56:55 UTC (217 KB)
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