The Solar hep Process in Effective Field Theory

Park, T. -S.; Marcucci, L. E.; Schiavilla, R.; Viviani, M.; Kievsky, A.; Rosati, S.; Kubodera, K.; Min, D. -P.; Rho, M.

The Solar hep Process in Effective Field Theory

Authors

Description

Using effective field theory, we calculate the S-factor for the hep process in a totally parameter-free formulation. The transition operators are organized according to chiral counting, and their matrix elements are evaluated using the realistic nuclear wave functions obtained in the correlated-hyperspherical-harmonics method. Terms of up to next-to-next-to-next-to-leading order in heavy-baryon chiral perturbation theory are considered. Fixing the only parameter in the theory by fitting the tritium β-decay rate, we predict the hep S-factor with accuracy better than \sim 20 %.
4 pages, Revtex. Minor revision has been made