Fukui, S
PI- P --> F1(1285) N
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Observation and Quantum Numbers Determination of the E(1420) Meson in pi- p Interactions at 3.95-GeV/c

The CERN-College de France-Madrid-Stockholm collaboration Dionisi, C. ; Gavillet, P. ; Armenteros, R. ; et al.
Nucl.Phys.B 169 (1980) 1-19, 1980.
Inspire Record 152746 DOI 10.17182/hepdata.34515

In a high statistics (90 events/μb) bubble chamber experiment, the reactions π − p→K s 0 K ± π ∓ n have been studied at 3.95 GeV/ c . A significant enhancement is observed in the ( K K π) system which we attribute to the production of the E(1420) meson. For its mass, M , and width, Λ, we find M =1426±6 MeV and Γ =40±15 MeV. The E(1420) quantum numbers are determined to be I G J P =0 + 1 + with a branching ratio E → K ∗ K + c.c E →[δπ+( K ∗ K + c.c. )]=0.86±0.12 , where δ→ K K . The cross section for the reaction π − p→En, with E→K 0 K ± π ± , is 8.2±1.0 μ b. Forward and backward productions are observed in the approximate ratio 2:1. The SU(3) assignment of the E(1420) meson is discussed.

3 data tables
Table 1

BACKGROUND SUBTRACTED.

Table 2

No description provided.

Table 3

No description provided.


Observation of the $D$, $e$ and Delta Mesons in $\pi^- p$ Interactions at 12-{GeV}/$c$ and 15-{GeV}/$c$

Corden, M.J. ; Dowell, J.D. ; Garvey, J. ; et al.
Nucl.Phys.B 144 (1978) 253-268, 1978.
Inspire Record 131142 DOI 10.17182/hepdata.22222

We have observed the D(1285), E(1420) and δ(975) mesons produced in 12 and 15 GeV/ c π − p interactions at the CERN Omega Spectrometer. Production cross sections and decay branching ratios are presented. Analysis of the decay D(1285) → δ (975) π favours a spin-parity assignment of 1 + .

3 data tables
Table 1

No description provided.

Table 2

CORRECTED FOR DECAY MODES OTHER THAN <ETA PI+ PI-> AND FOR THE UNOBSERVED PARTS OF THE T-DISTRIBUTION.

Table 3

No description provided.