Sigma exchange in the nuclear force and effective field theory

Details Sigma exchange in the nuclear force and effective field theory Sigma exchange in the nuclear force and effective field theory

2006-02-27

arxiv.org/abs/nucl-th/0602074v3

Phys.Lett. B643 (2006) 165-170

Physics

Nuclear Physics

Nuclear Theory

10 pages, 5 figures, Normalization in Fig 3b corrected

Scientific paper

10.1016/j.physletb.2006.10.033

In the phenomenological description of the nuclear interaction a crucial role is traditionally played by the exchange of a scalar I=0 meson, the sigma, of mass 500-600 MeV, which however is not seen clearly in the particle spectrum and which has a very ambiguous status in QCD. I show that a remarkably simple and reasonably controlled combination of ingredients can reproduce the features of this part of the nuclear force. The use of chiral perturbation theory calculations for two pion exchange supplemented by the Omnes function for pion rescattering suffices to reproduce the magnitude and shape of the exchange of a supposed $\sigma$ particle, even though no such particle is present in this calculation. I also show how these ingredients can describe the contact interaction that enters more modern descriptions of the internucleon interaction.

Affiliated with

Also associated with

No associations

Rating

Sigma exchange in the nuclear force and effective field theory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Sigma exchange in the nuclear force and effective field theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sigma exchange in the nuclear force and effective field theory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-388797