how QCD predicts the mass of the deuteron
Grossman..TM 10.14
"People have now" it's a true tour-de-force" calculated from first principles using lattice QCD.
the proton-neutron mass difference to point..??????.. .. and it's quite astounding"
Grossman was interrupted by Unzicker after"point"
So, what was the accuracy of the proton neutron mass difference p-n values?
PROTON 938.272088 Mev
NEUTRON 939.565420 Mev
subtraction P-N= -1.293332 Mev
QCD (2014) 1.5+_0.4 actually written as 1.51(16)(23)
So in answer to Edo's question " Is the neutron lighter than the proton"
according to QCD. the proton IS lighter than the neutron by
1.5 Mevs on average which is within 17 % of the measurable value(1.293332)
with an accuracy of 0.4 Mevs, which is 30% of the measurable value.
Another question...
Is energy released during fusion of two deuteriums to Helium?
Answer.. QCD is unsure based on the (in)accuracy (55Mev)
of the current binding energy calculations
however,,
"this will get better and better over the years of course" Grossman TM 11.23
Maybe in a 1000 years QCD can explain the makeup
of the n-p mass difference or neutron excess mass (1.293332 Mev)
to an accuracy of 1 ev..
https://arxiv.org/pdf/1406.4088.pdf