Bibliographic Details
| Title: |
Enhanced non-quark-antiquark and non-gluebal N_c behavior of light scalar mesons |
| Authors: |
Rios, Guillermo, Nebreda, Jenifer, Pelaez, Jose R. |
| Publication Year: |
2012 |
| Collection: |
High Energy Physics - Phenomenology |
| Subject Terms: |
High Energy Physics - Phenomenology |
| More Details: |
We report our results on the nature of the lightest scalar resonances, where we show that a quark-antiquark or glueball interpretation of the scalars f_0(600) and K^*_0(800) requires a very unnatural fine tuning to satisfy 1/N_c-expansion predictions for quark-antiquark or glueball states, which is not needed in the case of the lightest vector mesons \rho(770) and K^*(892). For this we consider scattering observables whose value is fixed to 1 for quark-antiquark and glueball states up to corrections suppressed by more than one power of 1/N_c, thus enhancing contributions of other nature. This allows us to evaluate these observables and check the 1/N_c predictions at N_c=3 without the need to extrapolate to unphysical N_c values. This is done using recent and very precise dispersive \pi\pi and \pi K scattering data analyses.
Comment: To appear in the proceedings of the sixth international conference on Quark and Nuclear Physics QNP2012, April 16 - 20 2012, Palaiseau (France) |
| Document Type: |
Working Paper |
| Access URL: |
http://arxiv.org/abs/1207.2330 |
| Accession Number: |
edsarx.1207.2330 |
| Database: |
arXiv |
