Regular Article - Theoretical Physics
Proton–proton fusion in new pionless EFT power counting
Department of Physics, University of Tehran, P.O.Box 14395-547, Tehran, Iran
* e-mail: firstname.lastname@example.org
Accepted: 15 May 2020
Published online: 3 June 2020
The zero-energy astrophysical S-factor for the fusion process is calculated using pionless effective field theory (EFT). In the present study, the order-by-order results are reproduced according to a new suggested power counting. The short range interactions in the S-wave pp scattering at leading order and the corrections in the next-to-leading order including the Coulomb interaction are introduced. In addition the Coulomb interaction between the incoming protons has been considered. The new nuclear EFT amplitude is compatible with renormalization-group invariance.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2020