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Nebreda Manjón, Jenifer and Carrasco, J. A. and Londergan, J. T. and Peláez Sagredo, José Ramón and Szczepaniak, Adam P.
(2016)
*Regge trajectories of ordinary and non-ordinary mesons from their scattering poles.*
In
XIth Conference on Quark Confinement and Hadron Spectrum.
AIP Conference Proceedings
(1701).
American Institute of Physics AIP.
ISBN 978-0-7354-1348-1

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Official URL: http://dx.doi.org/10.1063/1.4938632

## Abstract

Our results on obtaining the Regge trajectory of a resonance from its pole in a scattering process and from analytic constraints in the complex angular momentum plane are presented. The method, suited for resonances that dominate an elastic scattering amplitude, has been applied to the ρ(770), ƒ_2(1270), ƒ_2(1525) and ƒ_0(500) resonances. Whereas for the first three we obtain linear Regge trajectories, characteristic of ordinary quark-antiquark states, for the latter we find a non-linear trajectory with a much smaller slope at the resonance mass. We also show that if a linear trajectory with a slope of typical size is imposed for the ƒ_0(500), the corresponding amplitude is at odds with the data. This provides a strong indication of the non-ordinary nature of the sigma meson.

Item Type: | Book Section |
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Additional Information: | © 2016 AIP Publishing LLC. |

Uncontrolled Keywords: | Regge Theory; Light scalar mesons. |

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

ID Code: | 37094 |

Deposited On: | 13 Apr 2016 18:31 |

Last Modified: | 10 Dec 2018 15:09 |

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