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Kamiński, R and Peláez Sagredo, José Ramón and Ynduráin, F. J. (2006) Pion-pion scattering amplitude. II. Improved analysis above K̅K threshold. Physical review D, 74 (1). ISSN 1550-7998
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Official URL: http://dx.doi.org/10.1103/PhysRevD.74.014001
Abstract
We improve, in the energy region between the K̅K threshold and ~ 1.4 GeV, the energy-dependent phase shift analysis of π π scattering presented in a previous paper. For the S0 wave, we have included more data above the K̅K threshold and we have taken into account systematically the elasticity data on the reaction π π →K̅K. We here made a coupled channel fit. For the D0 wave, we have considered information on low energy parameters, and imposed a better fit to the f_2 resonance. For both waves the expressions we now find are substantially more precise than the previous ones. We also provide slightly improved D2 and P waves, including the estimated inelasticity for the first, and a more flexible parametrization between 1 and 1.42 GeV for the second. The accuracy of our amplitudes is now such that it requires a refinement of the Regge analysis, for^(1/2) ≥ 1.42 GeV, which we also carry out. We show that this more realistic input produces π π scattering amplitudes that satisfy better forward dispersion relations, particularly for π^0 π^0 scattering.
Item Type: | Article |
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Additional Information: | ©2006 The American Physical Society. |
Uncontrolled Keywords: | Phase-shift analysis; Gev-c; π-P->π π&N |
Subjects: | Sciences > Physics > Physics-Mathematical models Sciences > Physics > Mathematical physics |
ID Code: | 35370 |
Deposited On: | 03 Feb 2016 19:33 |
Last Modified: | 10 Dec 2018 15:09 |
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