Experiment

Theory

Proton magnetic momentum

2.792847356 (23)

2.792847356

Proton charge radius (fm)

0.8775 (51)

0.87750000

Proton mass M_p (GeV)

0.938272046 (21)

0.938272046

Neutron magnetic momentum

−1.91304272 (45)

−1.91304272

Neutron mean-square charge radius (fm²)

−0.1161 (22)

−0.11610000

Neutron mass (GeV)

0.939565379 (21)

0.939565379

uPP mass m_u (GeV)

-

0.3213453699

dPP mass m_d (GeV)

-

0.3381741985