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Carrasco, J. A. and Nebreda Manjón, Jenifer and Peláez Sagredo, José Ramón
(2015)
*Dispersive calculation of complex Regge trajectories for the lightest f_2 resonances and the K^∗(892).*
Physics letters B, 749
.
pp. 399-403.
ISSN 0370-2693

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Official URL: http://dx.doi.org/10.1016/j.physletb.2015.08.019

## Abstract

We apply a recently developed dispersive formalism to calculate the Regge trajectories of the f_2(1270), f´_ 2(1525) and K^∗(892) mesons. Trajectories are calculated, not fitted to a family of resonances. Assuming that these resonances can be treated in the elastic approximation, the only input are the pole position and residue of a resonance. In all three cases, the predicted Regge trajectories are almost real and linear, with slopes in agreement with the universal value of order 1 GeV_(−2). We also show how these results barely change when considering more than two subtractions in the dispersive formalism.

Item Type: | Article |
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Additional Information: | © 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. |

Uncontrolled Keywords: | Multiquark hadrons; Scalar mesons |

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

ID Code: | 34973 |

Deposited On: | 11 Jan 2016 18:08 |

Last Modified: | 10 Dec 2018 15:09 |

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