Please see my Postings on He-4 works where I calculate its mass accurately in 3 Parity ways using 2 Theorems in Physics, satisfying 6 Constraints (Quark, QCD, Yukawa Quantum, Most Symmetrical, Most Stable and Mother Nucleus to Rest except Hydrogen) and discovering 3 new constraints (Most Strong using Vector Equilibirum Theorem, Most Efficient Packing using HCP, Thompson Problem of Distributing Charges, and Evidence of Gravity). This work took from 2008 to 2010, where I discovered He-4 and then from 2010 to 2017, it took to Geometric Model and Predict its Mass to very close unit of 3803.688 MeV/c^2 vs 3727 MeV/c^2 of Alpha Particle (I did not know this before the work).
To satisfy Gravity modeling, and Nuclear Binding Mass, I get some mass of 1901.844 MeV/c^2 Mass.
I see a few papers here:
https://inspirehep.net/literature/297201
https://www.epj-conferences.org/articles/epjconf/pdf/2020/17/epjconf_nstar2020_01008.pdf
Article Strong Evidence for Nucleon Resonances near 1900 MeV