Speaker
Dr
Ashot Gasparyan
(Ruhr University of Bochum)
Description
Nucleon-nucleon interaction
is studied within chiral effective field theory with a finite cutoff
at next-to-leading order in the chiral expansion.
The leading order interaction is resummed non-perturbatively,
whereas the next-to-leading-order terms are taken into account in a perturbative manner.
Explicit renormalizability of such a scheme is proven in certain important cases.
In particular, it is verified whether the power-counting
breaking terms originating from the integration regions with large momenta
can be absorbed by the renormalization of the
low energy constants.
The importance of non-perturbative effects is analyzed in detail.
Primary author
Dr
Ashot Gasparyan
(Ruhr University of Bochum)
Co-author
Prof.
Evgeny Epelbaum
(Ruhr University of Bochum)
