Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-01-15
Physics
High Energy Physics
High Energy Physics - Phenomenology
To appear in the Proceedings of the Hadron09 International Conference. 29th Nov-4th Dec. 2009. Tallahassee, FL, USA. 5 pages
Scientific paper
One-loop unitarized Chiral Perturbation Theory (UChPT) calculations, suggest a different Nc behaviour for the sigma or f_0(600) and rho(770) mesons: while the rho meson becomes narrower with Nc, as is expected for a q-qbar meson, the sigma becomes broader, and its contribution to the total cross section is less and less important. On the other hand, local duality requires a cancellation between the sigma and rho amplitudes, but if there is a different Nc behaviour for them, there is a possible contradiction between the Inverse Amplitude Method (IAM) and local duality for large Nc. However, next to next to leading order UChPT calculations suggested a subdominant q-qbar component for the sigma with a mass around 1.2 GeV. In this work, we show that this subdominant q-qbar component is indeed needed to ensure local duality.
de Elvira Jacobo Ruiz
Pelaez Jose Ramon
Pennington M. R.
Wilson Dalziel J.
No associations
LandOfFree
Structure of the lightest scalar meson from the 1/Nc expansion of Unitarized Chiral Perturbation Theory and Regge 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 Structure of the lightest scalar meson from the 1/Nc expansion of Unitarized Chiral Perturbation Theory and Regge Theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure of the lightest scalar meson from the 1/Nc expansion of Unitarized Chiral Perturbation Theory and Regge Theory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-359407