I will be interested to hear your views on the work I have done here.
I proposed three curved spacetime Dirac equations in 2008 in the Journal Foundations of Physics:
https://www.researchgate.net/publication/268059255_Dirac_Equation_in_Curved_Spacetime_On_the_Anomalous_Gyromagnetc_Ratio
In the following papers:
https://www.researchgate.net/publication/297716028_Dirac_Equation_for_the_Proton_I_--_Why_Three_Quarks_for_Muster_Mark
https://www.researchgate.net/publication/297868680_Dirac_Equation_for_the_Proton_II_--_Why_Fractional_Charges_for_Muster_Mark's_Quarks
https://www.researchgate.net/publication/299384588_Dirac_Equation_for_the_Proton_III_--_Gyromagnetic_Ratio
I have now shown that these equations can explain why there must be three quarks inside the Proton with the electronic charges that quarks have.
Article Dirac Equation in Curved Spacetime On the Anomalous Gyromagnetc Ratio
Preprint Dirac Equation for the Proton (I) -- Why Three Quarks for Muster Mark?
Preprint Dirac Equation for the Proton (II) -- Why Fractional Charges...
Preprint Dirac Equation for the Proton (III) -- Gyromagnetic Ratio