The proton-proton fusion reaction
Bijaya Acharya (Mainz)

I will present a calculation of the rate of the proton-proton fusion reaction in chiral Effective Field Theory (EFT) with an analysis of the accompanying uncertainties.
A detailed comparison with a prior chiral EFT result involves (i) a simple analytic derivation of the finite-volume correction to capture and fusion cross sections calculated in a discrete basis and (ii) a pionless EFT calculation of the p-wave contribution to the fusion cross section.
Important nuclear physics implications of an ongoing measurement of the muon-deuteron capture rate by the MuSun collaboration at PSI will also be discussed.