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- Title
Process πp → ππN at High Energies and Moderate Momenta Transferred to the Nucleon and the Determination of Parameters of the f[sub 0](980) and f[sub 0](1300).
- Authors
Anisovich, V. V.; Sarantsev, A. V.
- Abstract
We present the results of simultaneous analysis of the S-wave ππ spectra in the reactions π[SUP-]p→(ππ)S[SUPn]at[SUBp[SUBlab]] = 38 GeV/c(GAMS) and π[SUP-]p→(ππ)S[SUPn]at[SUBp[SUBlab]] = 18 GeV/c(E852 Collaboration) at moderate momenta transferred to the nucleon, |t| ≲ 1.5 (GeV/c)[SUP2]. The t distributions are described by the Reggeized π and a[SUB1] exchanges provided by the leading and daughter trajectories, while the M[SUBπPi;] spectra are determined by a set of scalar -- isoscalar resonances. With M[SUBπPi;] distributions averaged over different t intervals, we have found several solutions given by different t-channel-exchange mechanisms at |t| ∼ (0.5-1.5) (GeV/c)[SUP2], with resonance parameters close to each other. We conclude that, despite a poor knowledge of the structure of the t exchange, the characteristics of resonances such as masses and widths can be reliably determined using the processes under discussion. As to pole positions, we have found (1031 ± 10) - i(35 ± 6) MeV for f[SUB0](980) and (1315 ± 20)-i(150 ±30) MeV for f[SUB0](1300).
- Subjects
SHEAR waves; RESONANCE
- Publication
Physics of Atomic Nuclei, 2003, Vol 66, Issue 5, p928
- ISSN
1063-7788
- Publication type
Article
- DOI
10.1134/1.1577915