Pi pi scattering lengths at O(p^6): resonance estimates
| dc.creator | Guo, Z. H. | |
| dc.creator | Sanz-Cillero, J. J. | |
| dc.date | 2009-04-27 | |
| dc.date.accessioned | 2026-07-07T13:08:58Z | |
| dc.date.available | 2026-07-07T13:08:58Z | |
| dc.description | In a previous paper, some deviations were found in the O(p^6) low-energy constants that contribute to the pi pi-scattering lengths. This work completes the study of all the relevant couplings (r_1, ... r_6, r_S2). We also perform a reanalysis of the hadronical inputs used for the estimation (resonance masses, widths...), checking the impact of the input uncertainties on the determinations of the chiral couplings and the scattering lengths a^I_J. A good agreement is found with respect to former works, though our detailed analysis produces a more solid estimate of these couplings and slightly larger errors. The effect in the final values of the a^I_J is negligible after combining them with the other uncertainties, being the previous scattering length determinations sound and reliable. Nevertheless, the uncertainties derived here for the O(p^6) contributions to the scattering lengths point out the limitation on further improvements unless the precision of the O(p^6) low-energy couplings is properly increased. | |
| dc.description | 7 pages. To appear in the proceedings of EFT'09 -International Workshop on Effective Field Theories: from the Pion to the Upsilon-, 1-6 February 2009, Valencia (Spain) | |
| dc.identifier | https://arxiv.org/abs/0904.4178 | |
| dc.identifier | http://arxiv.org/abs/0904.4178 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/228595 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Pi pi scattering lengths at O(p^6): resonance estimates | |
| dc.type | text |