Display MoreSo which value for n-p is valid

!.51,2.52 or -1.00 Mev

which one is closest to

1.293 332 05(48) MeV

Perhaps for neutron-proton mass difference

(n-p) the 2015 value

2.520 000 MeV. is closer to 1.293 332 05(48) MeV

not the 2008 value 1.510 000 MeV?Forget about

isospin.. irrelevantwhatever spin THH uses these quantum funk results are indefensible

Robert: you are not reading the paper.

The n-p value in the 2015 paper is clearly stated as 1.51MeV = 2.52MeV + -1.00MEeV (the QEC and QCD contributions, each solving a simplified version of the real problem - note 0.01 difference caused by rounding). See the link I posted Section 10.3.

You don't have to engage with what they actually did, you can just dismiss it without reading. But that would leave you uninformed.