HEPData Search

The inclusive jet cross-section has been measured at the CERN p p Collider ( s = 630 GeV ) as a function of the jet transverse momentum ( p T ) and pseudorapidity ( η ) for p T values up to 180 GeV and for−2< η <2. The results are consistent with leading order QCD calculations, and a lower limit Λ c >825 GeV (95% CL ) is set on the quark compositeness scale Λ c .

2 data tables

Table 1

No description provided.

Table 2

No description provided.

A Measurement of sigma B (W ---> e neutrino) and sigma B (Z0 ---> e+ e-) in anti-p p collisions at s**(1/2) = 1800-GeV

The CDF collaboration Abe, F. ; Amidei, D. ; Apollinari, G. ; et al.

Phys.Rev.D 44 (1991) 29-52, 1991.

Inspire Record 302820 DOI 10.17182/hepdata.42696

An analysis of high-transverse-momentum electrons using data from the Collider Detector at Fermilab (CDF) of p¯p collisions at s=1800 GeV yields values of the production cross section times branching ratio for W and Z0 bosons of σ(p¯p→WX→eνX)=2.19±0.04(stat)±0.21(syst) nb and σ(p¯p→Z0X→e+e−X)=0.209±0.013(stat)±0.017(syst) nb. Detailed descriptions of the CDF electron identification, background, efficiency, and acceptance are included. Theoretical predictions of the cross sections that include a mass for the top quark larger than the W mass, current values of the W and Z0 masses, and higher-order QCD corrections are in good agreement with these measured values.

1 data table

Table 1

No description provided.

Study of fast p, anti-p yields in pi- Be interaction at 40-GeV/c with cumulative particle production

Antipov, Yu.M. ; Batarin, V.A. ; Bezzubov, V.A. ; et al.

IFVE-90-171, 1990.

Inspire Record 304399 DOI 10.17182/hepdata.40709

None

13 data tables

Table 1

CHARGED IS CUMULATIVE PI+-, OR K+-, OR P+-.

Table 2

CHARGED IS CUMULATIVE PI+-, OR K+-, OR P+-.

Table 3

No description provided.

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rivet Analysis
Charged particle multiplicity distributions in Z0 hadronic decays

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

Z.Phys.C 50 (1991) 185-194, 1991.

Inspire Record 301657 DOI 10.17182/hepdata.15028

This paper presents an analysis of the multiplicity distributions of charged particles produced inZ0 hadronic decays in the DELPHI detector. It is based on a sample of 25364 events. The average multiplicity is <nch>=20.71±0.04(stat)±0.77(syst) and the dispersionD=6.28±0.03(stat)±0.43(syst). The data are compared with the results at lower energies and with the predictions of phenomenological models. The Lund parton shower model describes the data reasonably well. The multiplicity distributions show approximate KNO-scaling. They also show positive forward-backward correlations that are strongest in the central region of rapidity and for particles of opposite charge.

5 data tables

Table 1

Charged particle multiplicity distribution for the raw data in full phase space.

Table 2

Charged particle multiplicity distribution for full phase space. Errors include systematics. A 2 pct correction for excess electrons from photon conversions is not included. The first two points, at N=2 and 4, were not measured but taken from the Lund PS model.

Table 3

Charged particle multiplicity distribution for single hemisphere. Errors include systematics. A 2 pct correction for excess electrons from photon conversions is not included.

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Experimental study of the triple gluon vertex

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

Phys.Lett.B 255 (1991) 466-476, 1991.

Inspire Record 301659 DOI 10.17182/hepdata.48514

In four-jet events from e + e − →Z 0 →multihadrons one can separate the three principal contributions from the triple-gluon vertex, double gluon-bremsstrahlung and the secondary quark-antiquark production, using the shape of the two-dimensional angular distributions in the generalized Nachtmann-Reiter angle θ NR ∗ and the opening angle of the secondary jets. Thus one can identify directly the contribution from the triple-gluon vertex without comparison with a specific non-QCD model. Applying this new method to events taken with the DELPHI-detector we get for the ratio of the colour factor N c to the fermionic Casimir operator C F : N c C F = 2.55 ± 0.55 ( stat. ) ± 0.4 ( fragm. + models ) ± 0.2 ( error in bias ) in agreement with the value 2.25 expected in QCD from N c =3 and C F = 4 3 .

1 data table

Table 1

NC, CF, and TR are the color factors for SU(3) group.

Resonance states, including exotics in reactions pi+ p ---> n 4 pi+ 2 pi- at 4.2-GeV/c beam momentum

Brovkin, L.Yu. ; Kiselevich, I.L. ; Mikhailichenko, V.I. ; et al.

ITEP-90-110, 1990.

Inspire Record 303723 DOI 10.17182/hepdata.40019

None

3 data tables

Table 1

No description provided.

Table 2

THE RESONANCE PARAMETERS: MASS=1437 +-3 MEV, WIDTH=169 +-2 MEV.

Table 3

THE RESONANCE PARAMETERS: MASS=1418 +-3 MEV, WIDTH=60 +-5 MEV.

Date

Collaboration

Subject_areas

Phrases

Reactions

Observables

CM Energies (GeV)

Authors Reset

The Study of reactions with deuteron and pions in the final state by n p and d p interactions comparison

Mechanism of fast-nucleon production in the reactions (pi+,2p x) and (pi+,p x) on Ag and Br nuclei.

Analyzing power of the reactions d(pol.) + C --> p + X and d(pol.) + C --> p + p (d) + X at energies of 0.6-GeV/nucleon to 2.1-GeV/nucleon.

Observation of D0 ---> K+ pi- rho0 produced in interactions of 40-GeV - 70-GeV neutrons with hydrogen, carbon and aluminum

Inclusive jet cross-section and a search for quark compositeness at the CERN $\bar{p} p$ collider

A Measurement of sigma B (W ---> e neutrino) and sigma B (Z0 ---> e+ e-) in anti-p p collisions at s**(1/2) = 1800-GeV

Study of fast p, anti-p yields in pi- Be interaction at 40-GeV/c with cumulative particle production

rivet Analysis
Charged particle multiplicity distributions in Z0 hadronic decays

Experimental study of the triple gluon vertex

Resonance states, including exotics in reactions pi+ p ---> n 4 pi+ 2 pi- at 4.2-GeV/c beam momentum