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HK: Fachverband Physik der Hadronen und Kerne
HK 55: Hadronenstruktur und -spektroskopie
HK 55.6: Talk
Friday, March 23, 2012, 12:30–12:45, RW 2
Perturbative pions in chiral effective field theory for NN scattering — Evgeny Epelbaum1 and •Jambul Gegelia1,2 — 1Institut fuer Theoretische Physik II, Fakultaet fuer Physik und Astronomie, Ruhr-Universitaet Bochum, 44780 Bochum, Germany — 2High Energy Physics Institute, TSU, 0186 Tbilisi, Georgia
New approach to NN scattering problem in EFT suggested by Beane, Kaplan and Vourinen [1] exploits the fact that the convergence of perturbative series in quantum field theories depends on the choice of the renormalization condition. In particular, its is expected that by choosing a more adequate renormalization scheme one can make the perturbative expansion of the NN scattering amplitude convergent within the (modified) KSW power counting scheme, i.e. where the pions are treated perturbatively. We present our results for NN scattering amplitude obtained within this approach.
[1] S.R.Beane, D.B.Kaplan and A.Vuorinen, Phys.Rev. C 80, 011001(2009)