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Backward Production in $\pi^- p \to p_f \pi^+ \pi^- \pi^-$ Reaction at 9-{GeV}/$c$ and 12-{GeV}/$c$

Ferrer, A. ; Bouquet, B. ; D'Almagne, B. ; et al.
Nucl.Phys.B 142 (1978) 77-107, 1978.
Inspire Record 130740 DOI 10.17182/hepdata.34939

We have analyzed backward meson production in the reaction π − p → p f π + π − π − at 9 GeV/ c and 12 GeV/ c incident π − momenta, from an experiment performed at the CERN Ω Spectrometer using a fast proton (p f ) trigger device. We find strong production of quasi-two-body processes N ∗ ϱ and N ∗ f with a production mechanism consistent with u -channel nucleon exchange. At a lower level, we observe N ∗ π processes with a 3-body baryon decay through Δ(1232)π. In the (3π) − system, we find evidence for A 1 − and clear A 2 − backward production with similar cross sections (≈0.5 μb).

3 data tables
Table 1

No description provided.

Table 2

U-HELICITY JACKSON FRAME.

Table 3

U-HELICITY JACKSON FRAME.