Nature of the sigma meson as revealed by its softening process

Details Nature of the sigma meson as revealed by its softening process Nature of the sigma meson as revealed by its softening process

2010-07-10

arxiv.org/abs/1007.1718v2

Nucl.Phys.A848:341-365,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

33 pages, 7 figures, 4 tables, version accepted in Nucl. Phys. A

Scientific paper

10.1016/j.nuclphysa.2010.09.016

The pi pi scattering is studied in two-flavor chiral models with a finite pion mass to investigate the nature of the sigma meson which is observed as the lowest scalar-isoscalar resonance. We compare several models with different origins of the sigma meson, such as the chiral partner of the pion and the dynamically generated pi pi molecule. We find that the dynamically generated sigma meson exhibits a novel pattern of the threshold enhancement reflecting the s-wave nature of the resonance, which is qualitatively different from the softening of the chiral partner introduced as a bare field. This behavior around the threshold energy region is universal as far as the bare sigma pole stays away from the threshold throughout the symmetry restoration process. On the other hand, for m_pi=0, the dynamically generated sigma behaves similarly to the chiral partner in the symmetry restoration limit, implying the possibility of the dynamically generated chiral partner.

Affiliated with

Also associated with

No associations

Rating

Nature of the sigma meson as revealed by its softening process 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 Nature of the sigma meson as revealed by its softening process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nature of the sigma meson as revealed by its softening process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-300379