HEPData Search

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Experiments at VEPP-2M with SND detector

The SND collaboration Achasov, M.N. ; Aulchenko, V.M. ; Baru, S.E. ; et al.

BINP-98-65, 1998.

Inspire Record 476386 DOI 10.17182/hepdata.50374

Short overview of experiments with SND detector at VEPP-2M e^+e^- collider in the energy range 2E = 400 - 1400 MeV and preliminary results of data analysis are presented.

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Study of the pi0 pi0 system with the GAMS-4000 spectrometer at 100-GeV/c.

The GAMS collaboration Alde, D. ; Binon, F.G. ; Boutemeur, M. ; et al.

Eur.Phys.J.A 3 (1998) 361-371, 1998.

Inspire Record 474862 DOI 10.17182/hepdata.43500

The πpi-system produced in the charge exchange π−p-reaction at 100 GeV/c has been studied. The experiment was performed at the CERN SPS accelerator with the multiphoton hodoscope spectrometer GAMS-400

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Diffractive production of rho0 (770) mesons in muon - proton interactions at 470-GeV

The E665 collaboration Adams, M.R. ; Aderholz, M. ; Aïd, S. ; et al.

Z.Phys.C 74 (1997) 237-261, 1997.

Inspire Record 441201 DOI 10.17182/hepdata.14214

The diffractive production of ρ0(770 @#@) mesons in muon-proton interactions is studied in the kinematic region 0.15 GeV2< Q2< 20 GeV2 and 20 GeV < ? < 420 GeV. The data were obtained in the Fermilab fixed-target experiment E665 with primary muons of 470 GeV energy. Results are presented on the Q2, x and ? dependence of the cross section, on the shape of the ρ+ρt - mass spectrum, on the slope of the diffraction peak and on the production and decay angular distributions of the ρ0(770). The cross section for diffractive production of ρ0 by virtual photons on protons depends mainly on Q2. At fixed Q2, no significant dependence on x or ? is observed. The extrapolation to Q2 = 0 yields a photoproduction cross section of (10.30 ± 0.33) μb. The slope of the t′ distribution has a value of (7.0 ± 0.2) GeV−2, with a tendency to decrease as Q2 increases. The production and decay angular distributions of the ρ0 depend strongly on Q2 and are consistent with s-channel helicity conservation. The ratio R = σl/σt deduced from the decay angular distributions rises strongly with Q2, passing the value of 1 at Q2≈ 2 GeV2.

14 data tables

Table 1

Statistical errors only.

Table 2

Statistical errors only.

Table 3

Cross section extrapolated to Q**2 = 0.

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Spin-parity analysis of eta pi0 pi0 system in pi- p charge exchange reaction at 100-GeV/c by Zemach method.

The GAMS collaboration Alde, D. ; Binon, F.G. ; Bricman, C. ; et al.

IFVE-96-39, 1996.

Inspire Record 425699 DOI 10.17182/hepdata.40710

None

1 data table

Table 1

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.

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

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STUDY OF POLARIZATION EFFECTS IN rho0 MESON PRODUCTION IN THE (ANTI)-NEUTRINO CHARGED CURRENT INDUCED QUARK JET

Ammosov, V.V. ; Burtovoy, V.S. ; Gapienko, V.A. ; et al.

Yad.Fiz. 46 (1987) 1673-1679, 1987.

Inspire Record 239544 DOI 10.17182/hepdata.40759

None

8 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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2.22-{GeV} $\eta \eta^\prime$ Structure Observed in 38-{GeV}/$c$ and 100-{GeV}/$c \pi^- p$ Collisions

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

Phys.Lett.B 177 (1986) 120, 1986.

Inspire Record 230300 DOI 10.17182/hepdata.40940

A structure has been observed at 2220 MeV in the mass spectrum of ηη ′ systems produced by 38GeV/ c and 100 GeV/ c ′ negative pions on protons. The angular distribution of the decay products shows that this structure is presumably a spin J ⩾ 2 meson.

2 data tables

Table 1

No description provided.

Table 2

No description provided.