RT Journal Article
T1 f(0)(1370) Controversy from dispersive meson-meson scattering data analyses
A1 Peláez Sagredo, José Ramón
A1 Rodas, A.
A1 Ruiz De Elvira Carrascal, Jacobo
AB We establish the existence of the long-debated f(0)(1370) resonance in the dispersive analyses of meson-meson scattering data. For this, we present a novel approach using forward dispersion relations, valid for generic inelastic resonances. We find its pole at (1245 +/- 40) - i(300(-70)(+30)) MeV in pi pi scattering. We also provide the couplings as well as further checks extrapolating partial-wave dispersion relations or with other continuation methods. A pole at (1380(-60)(+70)) - i(220(-70)(+80)) MeV also appears in the pi pi -> K (K) over bar over bar data analysis with partial-wave dispersion relations. Despite settling its existence, our model-independent dispersive and analytic methods still show a lingering tension between pole parameters from the pi pi and K (K) over bar channels that should be attributed to data.
PB American Physical Society
SN 0031-9007
YR 2023
FD 2023-02-03
LK https://hdl.handle.net/20.500.14352/72282
UL https://hdl.handle.net/20.500.14352/72282
LA eng
NO © 2023 The Autor(s)This project has received funding from the Spanish Ministerio de Ciencia e Innovacion Grant No. PID2019-106080 GB-C21 and the European Union's Horizon 2020 research and innovation program under Grant Agreement No. 824093 (STRONG2020). A. R. acknowledges the financial support of the U.S. Department of Energy Contract No. DE-SC0018416 at the College of William & Mary, and Contract No. DE-AC05-06OR23177, under which Jefferson Science Associates, LLC, manages and operates Jefferson Lab. J. R. E. acknowledges financial support from the Swiss National Science Foundation under Project No. PZ00P2 174228 and from the Ramon y Cajal program (RYC2019-027605-I) of the Spanish MINECO.
NO Unión Europea. H2020
NO Ministerio de Ciencia e Innovación (MICINN)
NO Swiss National Science Foundation (SNSF)
NO United States Department of Energy (DOE)
NO Programa Ramón y Cajal
DS Docta Complutense
RD 7 abr 2025