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oai:docta.ucm.es:20.500.14352/242772023-08-27T05:39:27Zcom_20.500.14352_14col_20.500.14352_15

Dispersive calculation of complex Regge trajectories for the lightest f_2 resonances and the K^∗(892) Carrasco, J. A. Nebreda Manjón, Jenifer Peláez Sagredo, José Ramón 51-73 Multiquark hadrons Scalar mesons Física-Modelos matemáticos Física matemática © 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. We would like to than M.R. Pennington for several discussions. J.R.P. and J.N. are supported by the Spanish project FPA2011-27853-C02-02 and the Spanish network FIS2014-57026-REDT. J.N. acknowledges funding by the Fundación Ramón Areces. A.P.S. work is supported in part by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contracts DEAC05-06OR23177 and DE-FG0287ER40365. 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. Ministerio de Economía y Competitividad (MINECO) Fundacion Ramon Areces U.S. Department of Energy U.S. Department of Energy, Office of Science, Office of Nuclear Physics Depto. de Física Teórica Fac. de Ciencias Físicas TRUE pub 2023-06-18T06:48:50Z 2023-06-18T06:48:50Z 2015-10-07 journal article https://hdl.handle.net/20.500.14352/24277 0370-2693 10.1016/j.physletb.2015.08.019 eng FPA2011-27853-C02-02 FPA2011-27853-C02-02 DE-AC05-06OR23177 DE-FG0287ER40365 Atribución 3.0 España https://creativecommons.org/licenses/by/3.0/es/ open access application/pdf Elsevier Science BV