Mechanisms of the $f_0(980)$ production in the reaction $π^-p\toπ^0 π^0n$

Details Mechanisms of the $f_0(980)$ production in the reaction $π^-p\toπ^0 π^0n$ Mechanisms of the $f_0(980)$ production in the reaction $π^-p\toπ^0 π^0n$

2001-07-24

arxiv.org/abs/hep-ph/0107243v1

Phys.Lett. B528 (2002) 73-80

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages including 3 figures

Scientific paper

10.1016/S0370-2693(02)01203-0

The model of the pure one-pion exchange mechanism, which gives a good description of the GAMS results on the alteration of the $S$-wave $\pi^0\pi^0$ mass spectrum in the $f_0(980)$ region in the reaction $\pi^-p\to\pi^0\pi^0n$ with increasing $-t$, is compared with the recent detailed data on the $m$ and $t$ distributions of the $\pi^-p\to\pi^0\pi^0n$ events obtained by the BNL-E852 Collaboration. It is shown that the predictions of this model are not confirmed by the BNL data. Therefore the observed phenomenon should be explained by the different exchange mechanism. It is most likely to be the $a_1$ exchange mechanism.

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