pi pi invariant mass spectrum in V-prime ---> V pi pi and the f(0)(600) pole
(2004) Physical Review D, Particles, Fields, Gravitation and Cosmology — Vol. 69, p. 74033 (2004)
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- (en) We consider the phenomenological description of the two pion invariant mass spectrum in the $V' \to V \pi\pi$ decays. We study the parametrization of the amplitude involving both $S$ and $D$ wave contributions. From a fit to the two pion decays of the $ \Upsilon(nS)$ and $\Psi(nS)$ we determine the $f_0 (600)$ mass and width to be $m_{f_0}=528 \pm 32$ MeV and $\Gamma_{f_0}=413\pm 45$ MeV. The mass and width values we report correspond to the real and imaginary part of the S matrix pole respectively. Comment: 19 pages, 3 figures
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Gallegos, A., Lucio M., J. L., & Pestieau, J. (2004). pi pi invariant mass spectrum in V-prime ---> V pi pi and the f(0)(600) pole. Physical Review D, Particles, Fields, Gravitation and Cosmology, 69, 74033. https://doi.org/10.1103/PhysRevD.69.074033 (Original work published 2004)