Garcia-Martin, RKamiński, RobertPeláez Sagredo, José RamónRuiz de Elvira, Jacobo2023-06-202023-06-202011-08-09[1] M. H. Johnson and E. Teller, Phys. Rev. 98, 783 (1955). [2] K. Nakamura et al. (Particle Data Group), J. Phys. G 37, 075021 (2010). [3] G. Ecker, J. Gasser, A. Pich, and E. de Rafael, Nucl. Phys. B321, 311 (1989); J. F. Donoghue, C. Ramirez, and G. Valencia, Phys. Rev. D 39, 1947 (1989). [4] A. Dobado and J. R. Pelaez, Phys. Rev. D 56, 3057 (1997). [5] Z. Y. Zhou et al., J. High Energy Phys. 02 (2005) 043. [6] E. van Beveren et al., Z. Phys. C 30, 615 (1986); R. Kaminski, L. Lesniak, and J. P. Maillet, Phys. Rev. D 50, 3145 (1994); R. Delbourgo and M. D. Scadron, Mod. Phys. Lett. A 10, 251 (1995); S. Ishida et al., Prog. Theor. Phys. 95, 745 (1996); M. Harada, F. Sannino, and J. Schechter, Phys. Rev. D 54, 1991 (1996); N. A. Tornqvist and M. Roos, Phys. Rev. Lett. 76, 1575 (1996); J. A. Oller and E. Oset, Nucl. Phys. A620, 438 (1997); A652, 407(E) (1999); D. Black et al., Phys. Rev. D 59, 074026 (1999); D. V. Bugg, Phys. Lett. B 572, 1 (2003); 595, 556(E) (2004); Phys. Rep. 397, 257 (2004); M. Ablikim et al. (BES Collaboration), Phys. Lett. B 598, 149 (2004); A. V. Anisovich et al., arXiv:1105.5923. [7] J. A. Oller, E. Oset, and J. R. Pelaez, Phys. Rev. D 59, 074001 (1999); 60, 099906(E) (1999); 75, 099903(E) (2007); J. R. Pelaez, Mod. Phys. Lett. A 19, 2879 (2004). [8] I. Caprini, G. Colangelo, and H. Leutwyler, Phys. Rev. Lett. 96, 132001 (2006); H. Leutwyler, AIP Conf. Proc. 1030, 46 (2008). [9] R. Garcia-Martin, J. R. Pelaez, and F. J. Yndurain, Phys. Rev. D 76, 074034 (2007). [10] I. Caprini, Phys. Rev. D 77, 114019 (2008). [11] J. A. Oller, Nucl. Phys. A727, 353 (2003). [12] G. Mennessier, S. Narison, and X. -G. Wang, Nucl. Phys. B, Proc. Suppl. 207–208, 177 (2010); Phys. Lett. B 696, 40 (2011); 688, 59 (2010); R. Kaminski, G. Mennessier, and S. Narison, Phys. Lett. B 680, 148 (2009). [13] J. R. Pelaez and G. Rios, Phys. Rev. D 82, 114002 (2010). [14] E. Klempt and A. Zaitsev, Phys. Rep. 454, 1 (2007). [15] S. M. Roy, Phys. Lett. 36B, 353 (1971). [16] M. R. Pennington and S. D. Protopopescu, Phys. Rev. D 7, 1429 (1973); 7, 2591 (1973); J. L. Basdevant, C. D. Froggatt, and J. L. Petersen, Phys. Lett. 41B, 173 (1972); 41B, 178 (1972); Nucl. Phys. B72, 413 (1974). [17] B. Ananthanarayan et al., Phys. Rep. 353, 207 (2001). [18] G. Colangelo, J. Gasser, and H. Leutwyler, Nucl. Phys. B603, 125 (2001). [19] S. Descotes-Genon et al., Eur. Phys. J. C 24, 469 (2002). [20] R. Kaminski, L. Lesniak, and B. Loiseau, Phys. Lett. B 551, 241 (2003). [21] D. Barberis et al. (WA102 Collaboration), Phys. Lett. B 462, 462 (1999). [22] R. R. Akhmetshin et al. (CMD-2 Collaboration), Phys. Lett. B 462, 380 (1999). [23] E. M. Aitala et al. (E791 Collaboration), Phys. Rev. Lett. 86, 765 (2001). [24] M. Ablikim et al. (BES Collaboration), Phys. Lett. B 607, 243 (2005). [25] Y. Mao et al., Phys. Rev. D 79, 116008 (2009). [26] J. R. Batley et al. (NA48-2 Collaboration), Eur. Phys. J. C 70, 635 (2010). [27] R. Garcia-Martin et al., Phys. Rev. D 83, 074004 (2011). [28] B. Hyams et al., Nucl. Phys. B64, 134 (1973); G. Grayer et al., Nucl. Phys. B75, 189 (1974).S. D. Protopopescu et al., Phys. Rev. D 7, 1279 (1973); R. Kaminski, L. Lesniak, and K. Rybicki, Z. Phys. C 74, 79 (1997); Eur. Phys. J. C 4, 4 (2002); J. Gunter et al. (E852 Collaboration), arXiv:hep-ex/9609010. [29] L. Rosselet et al., Phys. Rev. D 15, 574 (1977); S. Pislak et al. (BNL-E865 Collaboration), Phys. Rev. Lett. 87, 221801 (2001). [30] R. Kaminski, J. R. Pelaez, and F. J. Yndurain, Phys. Rev. D 77, 054015 (2008); 74, 014001 (2006); J. R. Pelaez and F. J. Yndurain, Phys. Rev. D 71, 074016 (2005); 69, 114001 (2004). [31] K. L. Au, D. Morgan, and M. R. Pennington, Phys. Rev. D 35, 1633 (1987); D. Morgan and M. R. Pennington, Phys. Rev. D 48, 1185 (1993).B. S. Zou and D. V. Bugg, Phys. Rev. D 48, R3948 (1993).D. V. Bugg, Eur. Phys. J. C 47, 45 (2006). [32] M. R. Pennington, Phys. Rev. Lett. 97, 011601 (2006); J. A. Oller and L. Roca, Eur. Phys. J. A 37, 15 (2008).J. Bernabeu and J. Prades, Phys. Rev. Lett. 100, 241804 (2008).0031-900710.1103/PhysRevLett.107.072001https://hdl.handle.net/20.500.14352/44830©2011 American Physical Society.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.engjournal articlehttp://dx.doi.org/10.1103/PhysRevLett.107.072001http://journals.aps.orgopen access51-73π-π ScatteringChiral perturbation-theoryMeson dynamicsFinal-statesPhase-shiftGamma-GgmmaSigma-PpleAmplitudesDecaysModelFísica-Modelos matemáticosFísica matemática