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The relative differential cross-section data in elastic scattering of negative pions on protons between 1.43-GeV/c and 2.07-GeV/c

Alekseev, I.G. ; Budkovsky, P.E. ; Kanavets, V.P. ; et al.

136-141, 1989.

Inspire Record 292460 DOI 10.17182/hepdata.40058

None

1 data table

Table 1

NAME=THEORY DENOTES THE MONTE-CARLO GENERATED CROSS SECTIONS.

Evidence for a 1.9-{GeV} Meson Decaying Into $\eta \eta^\prime$

The IFVE-Brussels-Annecy-Los Alamos collaboration Alde, D. ; Binon, F.G. ; Bricman, C. ; et al.

Phys.Lett.B 216 (1989) 447, 1989.

Inspire Record 267048 DOI 10.17182/hepdata.29856

Evidence for a new meson decaying into ηη′ has been found in 38 GeV π − p charge-exchange interactions. The mass and the width of this meson are (1917 ± 15) MeV and (90 −50 +35 ) MeV, respectively. Possible spin and parity assignments are J PC = 0 ++ , 1 −+ or 2 ++ , isospin and G -parity are I G = 0 + . The t -dependence of the differential cross section follows an exponential behaviour exp( bt with a small slope: b = (2±1) (GeV/ c ) −2 .Upper limits on its decay into ππ, ηη and K K exotic interpretation of this meson.

1 data table

Table 1

No description provided.

Study of $\omega \omega$ Systems Produced in 38-{GeV}/$c \pi^- p$ Collisions

The IHEP-IISN-LANL-LAPP-TSUIHEP collaboration Alde, D. ; Binon, F.G. ; Bricman, C. ; et al.

Phys.Lett.B 216 (1989) 451, 1989.

Inspire Record 267049 DOI 10.17182/hepdata.29857

The π − p→ ωω n reaction has studied for the first time at the 70 GeV IHEP accelerator. The six photons from the decay of the two ω mesons were detected in GAMS-2000, a hodoscope multi-photon spectometer. Two resonances decaying into ωω,X (1640) and X(1960), have been observed. Their quantum numbers are J PC =2 ++ , I G =0 + . The reaction is dominated by the one-pion exchange mechanism. The production cross sections σ. BR(X→ ωω ) are 0.65±0.15 μ b and 1.0±0.2 μ b, respectively.

2 data tables

Table 1

X(1640) IS A JPC - 2++, IG - 0+ MESON WITH MASS 1643+-7 MEV.

Table 2

X(1960) IS A JPC - 2++, IG - 0+ MESON WITH MASS 1956+-20 MEV.

Evidence for Iota (1460) Production in $\pi^- p$ Interactions at 21.4-{GeV}/$c$

Rath, M.G. ; Cason, N.M. ; Bensinger, J.R. ; et al.

Phys.Rev.Lett. 61 (1988) 802, 1988.

Inspire Record 262921 DOI 10.17182/hepdata.20086

The KS0KS0π0 system has been studied in the exclusive reaction π−p→KS0KS0π0n at 21.4 GeV/c. Evidence for the production of the f1(1285) and the η(1460) is presented. The η(1460) is produced away from minimum momentum transfer in the presence of nonresonant K*K (S-wave) production and phase-space background. The observed mass, width, and decay properties of the η(1460) are consistent with those attributed to the ι(1460) observed in radiative Jψ decay.

1 data table

Table 1

No description provided.

OBSERVATION OF AN EXOTIC MESON OF 1.9-GeV MASS DECAYING INTO eta-prime eta

The IFVE-Brussels-Annecy-Los-Alamos collaboration Alde, D. ; Binon, F.G. ; Bricman, C. ; et al.

Sov.J.Nucl.Phys. 48 (1988) 1035, 1988.

Inspire Record 264474 DOI 10.17182/hepdata.40730

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Evidence for a 1-+ Exotic Meson

The IHEP-Brussels-Los Alamos-Annecy(LAPP) collaboration Alde, D. ; Binon, F.G. ; Boutemeur, M. ; et al.

Phys.Lett.B 205 (1988) 397, 1988.

Inspire Record 260839 DOI 10.17182/hepdata.29972

A non q q ,J PC = 1 −+ , I G =1 − meson has been observed in the study of the exclusive reaction π − p→π 0 ηn at 100 GeV. Its mass is (1406±20) MeV. Its width is (180±30) MeV.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Production of $G(1590)$ in 300-{GeV} Central $\pi^- N$ Collisions

The Serpukhov-Brussels-Los Alamos-Annecy(LAPP)-Pisa collaboration Alde, D. ; Bellazzini, R. ; Binon, F.G. ; et al.

Phys.Lett.B 201 (1988) 160, 1988.

Inspire Record 250393 DOI 10.17182/hepdata.6493

Significant production of G(1590), a scalar glueball candidate, is observed in a study of η pairs produced in π−N central collisions at 300 GeV/ c .

2 data tables

Table 1

No description provided.

Table 2

No description provided.

NEUTRAL MESONS WHICH DECAY INTO 4 pi0

The Serpukhov-Brussels-Los Alamos-Annecy(LAPP) collaboration Alde, D. ; Binon, F.G. ; Bricman, C. ; et al.

Phys.Lett.B 198 (1987) 286-291, 1987.

Inspire Record 250768 DOI 10.17182/hepdata.30106

Data on the 4π 0 decay mode of mesons have been obtained in a search for glueballs performed at the CERN SPS with the GAMS-4000 multiphoton spectrometer. A new tensor glueball candidate X(1810) appears as a clear peak in the 4π 0 mass spectrum. The 4π 0 decay of G(1590) is also observed. The measured value of BR(G→4 π 0 )/BR(G→ ηη )=0.8±0.3 further supports the glueball assignment of this scalar particle. The rate decay of f(1270) into 4π 0 has been measured: BR(f→4 π 0 ) = (3±1)×10 −3 .

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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