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- W2009342424 abstract "We present an improved set of parameters for a successful bootstrap of the $ensuremath{rho}$ and Pomeranchon Regge trajectories in pion-pion scattering. The resulting $ensuremath{pi}ensuremath{-}ensuremath{pi}$ amplitudes are compared with the experimental data, with particular reference to the low-energy $S$-wave phase shifts, which agree fairly well with present indications. We obtain for the trajectory intercepts ${ensuremath{alpha}}_{P}(0)=1.0$ and ${ensuremath{alpha}}_{ensuremath{rho}}(0)=0.55$; for the $ensuremath{rho}$-meson width ${ensuremath{Gamma}}_{ensuremath{rho}}=143$ MeV; and for the $S$-wave scattering lengths ${a}_{0}=(0.15ifmmodepmelsetextpmfi{}0.05){{m}_{ensuremath{pi}}}^{ensuremath{-}1}$, ${a}_{2}=(ensuremath{-}0.04ifmmodepmelsetextpmfi{}0.015){{m}_{ensuremath{pi}}}^{ensuremath{-}1}$." @default.
- W2009342424 created "2016-06-24" @default.
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- W2009342424 date "1969-09-25" @default.
- W2009342424 modified "2023-09-26" @default.
- W2009342424 title "Low-Energy Pion-Pion Scattering in the Unitarized Strip Approximation" @default.
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- W2009342424 doi "https://doi.org/10.1103/physrev.185.2020" @default.
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