### Impacto

### Downloads

Downloads per month over past year

Garcia-Martin, R and Kamiński, Robert and Peláez Sagredo, José Ramón and Ruiz de Elvira, Jacobo
(2011)
*Precise determination of the f(0)(600) and f(0)(980) pole parameters from a dispersive data analysis.*
Physical review letters, 107
(7).
ISSN 0031-9007

Preview |
PDF
326kB |

Official URL: http://dx.doi.org/10.1103/PhysRevLett.107.072001

## Abstract

We use our latest dispersive analysis of π π scattering data and the very recent K_(l4) experimental results to obtain the mass, width, and couplings of the two lightest scalar-isoscalar resonances. These parameters are defined from their associated poles in the complex plane. The analytic continuation to the complex plane is made in a model-independent way by means of once-and twice-subtracted dispersion relations for the partial waves, without any other theoretical assumption. We find the f(0)(600) pole at [457_(-13)^(+14)] – i[279_(-7)^(+11)+ MeV and that of the f(0)(980) at (996 ± 7) – i[25_(-6)^(+10)] MeV, whereas their respective couplings to two pions are 3.59_(-0.13)^(+0.11) and 2.3 ± 0.2 GeV.

Item Type: | Article |
---|---|

Additional Information: | ©2011 American Physical Society. |

Uncontrolled Keywords: | π-π Scattering; Chiral perturbation-theory; Meson dynamics; Final-states; Phase-shift; Gamma-Ggmma; Sigma-Pple; Amplitudes; Decays; Model |

Subjects: | Sciences > Physics > Physics-Mathematical models Sciences > Physics > Mathematical physics |

ID Code: | 35004 |

Deposited On: | 14 Jan 2016 16:11 |

Last Modified: | 10 Dec 2018 15:09 |

### Origin of downloads

Repository Staff Only: item control page