DN/DU
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Backward $K^{*0}$ Production in $\pi^- p \to \Lambda^0 K^+ \pi^-$ Reaction at 9-{GeV}/$c$ and 12-{GeV}/$c$

Ferrer, A. ; Treille, D. ; Rivet, P. ; et al.
Nucl.Phys.B 178 (1981) 373-391, 1981.
Inspire Record 153782 DOI 10.17182/hepdata.34397

We have analysed about 85 000 fast Λ 0 events, obtained in a fast proton triggered experiment performed at the CERN-Ω spectrometer at 9 and 12 GeV/ c incident π − beam. Nearly 2500 Λ 0 K + π − events have been isolated. We find strong production of quasi-two-body processes Λ 0 K ∗0 and ∑ ∗− K + consistent with u -channel hyperon exchange. Results on Λ 0 polarization, K ∗0 decay parameters and differential cross sections are given for Λ 0 K ∗0 (892) and Λ 0 K ∗0 (1430) final states. A comparison is made with the associated backward Λ 0 (1520) K ∗0 production seen in the four-prong reaction π − p→pK − K + π − obtained in the same experiment.

8 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

EXPONENTIAL FIT TO DN/DU.

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BACKWARD omega0 AND eta0 PRODUCTION IN pi p INTERACTIONS AT 9-GeV/c AND 12-GeV/c

Benkheiri, P. ; Eisenstein, Bob I. ; Fleury, P. ; et al.
Nucl.Phys.B 150 (1979) 268-286, 1979.
Inspire Record 132166 DOI 10.17182/hepdata.34809

We have studied the backward production of ω 0 mesons in the u -channel I u = 1 2 exchange reaction π − p → N 0 (1680) ω 0 at 9 GeV/ c and 12 GeV/ c incident momenta. The data come from an experiment performed at the CERN Omega Spectrometer using a fast proton trigger device. The backward production of the η 0 meson has also been observed and the coupling constant ratio g η NN / g π NN has been estimated.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

JACKSON FRAME (U-CHANNEL HELICITY SYSTEM).


Baryon Exchange in the Reaction pi- p --> n*0 pi0 at 9-GeV/c and 12-GeV/c

Rouge, A. ; de Rosny, G. ; Fleury, P. ; et al.
Phys.Lett.B 69 (1977) 115-118, 1977.
Inspire Record 5224 DOI 10.17182/hepdata.27540

In π − p interactions at 9 GeV/ c and 12 GeV/ c , the forward production of N ∗ 1680 and N ∗ 1520 has been observed with features of nucleon exchange. The production of Δ1232 is strongly suppressed.

2 data tables
Table 1

No description provided.

Table 2

SLOPE ABOUT 6 GEV**-2 FOR SMALL U AND EVIDENCE FOR CHANGE OF SLOPE NEAR -U = 0.15 GEV**2.