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Nebreda Manjón, Jenifer and Peláez Sagredo, José Ramón and Ríos, G. (2013) Determination of SU(2) chiral perturbation theory low energy constants from a precise description of pion-pion scattering threshold parameters. Physical review D, 88 (5). ISSN 1550-7998
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Official URL: http://dx.doi.org/10.1103/PhysRevD.88.054001
Abstract
We determine the values of the one- and two-loop low energy constants appearing in the SU(2) Chiral Perturbation Theory calculation of pion-pion scattering. For this we use a recent and precise sum rule determination of some scattering lengths and slopes that appear in the effective range expansion. In addition we provide sum rules for these coefficients up to third order in the expansion. Our results when using only the scattering lengths and slopes of the S, P, D, and F waves are consistent with previous determinations but seem to require higher order contributions if they are to accommodate the third order coefficients of the effective range expansion.
Item Type: | Article |
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Additional Information: | ©2013 American Physical Society. |
Uncontrolled Keywords: | Isospin breaking; Partial waves; Form-factors; Sum-rules; Constraints; Amplitudes; Qcd; Lagrangians; Equation; Symmetry |
Subjects: | Sciences > Physics > Physics-Mathematical models Sciences > Physics > Mathematical physics |
ID Code: | 33867 |
Deposited On: | 04 Nov 2015 15:39 |
Last Modified: | 10 Dec 2018 15:09 |
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