Systematic Nuclear Uncertainties in the Hypertriton System
Journal article, 2021

The hypertriton bound state is relevant for inference of knowledge about the hyperon–nucleon (YN) interaction. In this work we compute the binding energy of the hypertriton using the ab initio hypernuclear no-core shell model (NCSM) with realistic interactions derived from chiral effective field theory. In particular, we employ a large family of nucleon–nucleon interactions with the aim to quantify the theoretical precision of predicted hypernuclear observables arising from nuclear-physics uncertainties. The three-body calculations are performed in a relative Jacobi-coordinate harmonic oscillator basis and we implement infrared correction formulas to extrapolate the NCSM results to infinite model space. We find that the spread of the predicted hypertriton binding energy, attributed to the nuclear-interaction model uncertainty, is about 100 keV. In conclusion, the sensitivity of the hypertriton binding energy to nuclear-physics uncertainties is of the same order of magnitude as experimental uncertainties such that this bound-state observable can be used in the calibration procedure to constrain the YN interactions.


Thiri Yadanar Htun

University of Mandalay

Chalmers, Physics, Subatomic and Plasma Physics

Suranaree University of Technology

Daniel Gazda

Nuclear Physics Institute

Chalmers, Physics, Subatomic and Plasma Physics

Christian Forssén

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Yupeng Yan

Suranaree University of Technology

Few-Body Systems

0177-7963 (ISSN) 1432-5411 (eISSN)

Vol. 62 4 94

Weak and rare nuclear processes: nuclear probes of fundamental symmetries and dark matter

Swedish Research Council (VR) (2017-04234), 2018-01-01 -- 2021-12-31.

Subject Categories

Subatomic Physics

Other Physics Topics

Theoretical Chemistry



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