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rivet Analysis
Charged particle multiplicity distributions in restricted rapidity intervals in Z0 hadronic decays.

The DELPHI collaboration Abreu, P. ; Adam, W. ; Adami, F. ; et al.

Z.Phys.C 52 (1991) 271-281, 1991.

Inspire Record 324035 DOI 10.17182/hepdata.14860

The multiplicity distributions of charged particles in restricted rapidity intervals inZ0 hadronic decays measured by the DELPHI detector are presented. The data reveal a shoulder structure, best visible for intervals of intermediate size, i.e. for rapidity limits around ±1.5. The whole set of distributions including the shoulder structure is reproduced by the Lund Parton Shower model. The structure is found to be due to important contributions from 3-and 4-jet events with a hard gluon jet. A different model, based on the concept of independently produced groups of particles, “clans”, fluctuating both in number per event and particle content per clan, has also been used to analyse the present data. The results show that for each interval of rapidity the average number of clans per event is approximately the same as at lower energies.

15 data tables match query

Table 1

Data for both hemispheres.

Table 2

Data for both hemispheres.

Table 3

Data for both hemispheres.

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BARYONIC RESONANCE PRODUCTION IN ANTI-P P INTERACTIONS AT 32-GEV/C. FRANCE-SOVIET UNION AND CERN-SOVIET UNION COLLABORATIONS

Baland, J.F. ; Poiret, C. ; Windmolders, R. ; et al.

Z.Phys.C 3 (1979) 187-191, 1979.

Inspire Record 148165 DOI 10.17182/hepdata.16657

None

5 data tables match query

Table 1

Table 2

Table 3

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Study of the Reaction $e^+ e^- \to \pi^+ \pi^- \pi^0 \pi^0$ at (2 $e$) Up to 1.4-{GeV}

Kurdadze, L.M. ; Lelchuk, M.Yu. ; Pakhtusova, E.V. ; et al.

JETP Lett. 43 (1986) 643-645, 1986.

Inspire Record 240580 DOI 10.17182/hepdata.16834

None

1 data table match query

Table 1

No description provided.

Collective excitation of Delta isobar in the charge exchange reactions (Li-7, Be-7) and (H-3, He-3) at a momentum of 3-GeV/c/nucleon

Avramenko, S.A. ; Abdurakhimov, A.U. ; Aksinenko, V.D. ; et al.

JETP Lett. 55 (1992) 707-712, 1992.

Inspire Record 346156 DOI 10.17182/hepdata.16833

None

2 data tables match query

Table 1

No description provided.

Table 2

No description provided.

SEARCH FOR THE DECAY K(S) ---> 2 GAMMA

Vasserman, I.B. ; Golubev, V.B. ; Gluskin, E.S. ; et al.

JETP Lett. 43 (1986) 588-590, 1986.

Inspire Record 239033 DOI 10.17182/hepdata.16835

None

1 data table match query

Table 1

No description provided.

OBSERVATION OF THE PROCESS E+ E- ---> GAMMA GAMMA GAMMA GAMMA

Vasserman, I.B. ; Golubev, V.B. ; Dolinsky, S.I. ; et al.

JETP Lett. 44 (1986) 634-637, 1986.

Inspire Record 241072 DOI 10.17182/hepdata.16909

None

4 data tables match query

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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STUDY OF THE OMEGA MESON IN THE VEPP-2M STORAGE RING

Kurdadze, L.M. ; Pakhtusova, E.V. ; Sidorov, V.A. ; et al.

JETP Lett. 36 (1982) 274-276, 1982.

Inspire Record 185895 DOI 10.17182/hepdata.16930

None

1 data table match query

Table 1

No description provided.

Study of the Leptonic Decays of the $Z^0$ Boson

The DELPHI collaboration Aarnio, P. ; Abreu, P. ; Adam, W. ; et al.

Phys.Lett.B 241 (1990) 425-434, 1990.

Inspire Record 295500 DOI 10.17182/hepdata.15431

Measurements are presented of the cross section ratios R ℓ = σ ℓ ( e + e − →ℓ + ℓ − ) σ h ( e + e − →hadrons) for ℓ=e, μ and τ using data taken from a scan around the Z 0 . The results are R e =(5.09± o .32±0.18)%, R μ =(0.46±0.35±0.17)% and R τ =(4.72±0.38±0.29)% where, for the ratio R e , the t -channel contribution has been subtracted. These results are consistent with the hypothesis of lepton universality and test this hypothesis at the energy scale s ∼8300 GeV 2 . The absolute cross sections σ ℓ (e + e − →ℓ + ℓ − ) have also been measured. From the cross sections the leptonic partial widths Γ e =(83.2±3.0±2.4) MeV, (Γ e Γ μ ) 1 2 =(84.6±3.0±2.4) MeV and (Γ e Γ τ ) 1 2 =(82.6±3.3±3.2) MeV have been extracted. Assuming lepton universality the ratio Γ ℓ Γ h =(4.89±0.20±0.12) × 10 −2 w was obtained, together with Γ ℓ =(83.6±1.8±2.2) MeV. The number of light neutrino species is determined to be N v =3.12±0.24±0.25. Al the data are consistent with the predictions of the standard model.

4 data tables match query

Table 1

E+ E- final state is t-channel subtracted.

Table 2

No t-channel subtraction. Statistical errors only.

Table 3

Statistical errors only.

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