Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-05-28
Acta Phys.Polon.Supp.2:215,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
Invited talk at the Exicted QCD Meeting. 8-14 February 2009. Zakopane. Poland
Scientific paper
We briefly review how light meson resonances are described within one and two-loop Unitarized Chiral Perturbation Theory amplitudes and how, close to Nc=3, light vectors follow the Nc behavior of $q\bar q$ mesons whereas light scalars do not. This supports the hypothesis that the lightest scalar is not predominantly a $q\bar q$ meson, although a subdominant $q\bar q$ component is suggested around 1 GeV at somewhat larger Nc. In contrast, when Nc is very far from 3, like in the Nc --> infinity limit, we explain again in detail why unitarization is not, a priori, reliable nor robust and why this limit should not be used to drag any conclusions about the dominant nature of physical light scalar mesons.
Pelaez Jose Ramon
Rios Guillermo
No associations
LandOfFree
Light scalar mesons: comments on their behavior in the 1/Nc expansion near Nc=3 versus the Nc --> infinity limit 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 Light scalar mesons: comments on their behavior in the 1/Nc expansion near Nc=3 versus the Nc --> infinity limit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light scalar mesons: comments on their behavior in the 1/Nc expansion near Nc=3 versus the Nc --> infinity limit will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-294503