Bacci, C.
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rivet Analysis
Measurements of Total Hadronic and Inclusive $D^*$ Cross-sections in $e^+ e^-$ Annihilations Between 3.87-{GeV} and 4.5-{GeV}

Osterheld, A. ; Hofstadter, R. ; Horisberger, R. ; et al.
SLAC-PUB-4160, 1986.
Inspire Record 238081 DOI 10.17182/hepdata.18759

None

2 data tables
Table 1

R measurement.

Table 2

D* cross sections.


Production and Fragmentation of the $D^*$0 Meson in $e^+ e^-$ Annihilations

Low, E.H. ; Abachi, S. ; Akerlof, C. ; et al.
Phys.Lett.B 183 (1987) 232-236, 1987.
Inspire Record 20879 DOI 10.17182/hepdata.6543

Neutral D ∗ meson production in e + e − annihilation at √ s =29 GeV has been studied using the high resolution spectrometer. The decay of D ∗0 into D 0 γ, where the D 0 decays into K −π + , has been observed. The production cross section in units of the point cross section is 0.63±0.22 for fractional energy Z ⩾0.5. The fragmentation function is compared with that of the D ∗+ meson measured in the same experiment.

5 data tables
Table 1

No description provided.

Table 2

Assuming additionaly BR(D0-->K PI) of 0.56 +- 0.005.

Table 3

Corresponding R value.

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Direct Photon Plus Away - Side Jet Production in $p p$ Collisions at $s^1$/2 = 63-{GeV} and a Determination of the Gluon Distribution

The Axial Field Spectrometer collaboration Åkesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.
Z.Phys.C 34 (1987) 293, 1987.
Inspire Record 235690 DOI 10.17182/hepdata.15800

We have determined the double inclusive cross-section for opposite-side high-pT photons and away-side jets withθγ≈θjet≈90° produced inpp collisions at the CERN Intersecting Storage Rings at\(\sqrt s= 63\) GeV. Under the assumption that these events arise predominantly from the QCD gluon Compton process we have calculated the gluon structure function in the range 0.15≦x≦0.30 at an average square of the four-momentum transfer of 40 GeV2/c2. The data favour a soft gluon distribution in the proton.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Diffractive Photoproduction of a $b_1 \pi$ System

The Omega Photon collaboration Atkinson, M. ; Axon, T.J. ; Barberis, D. ; et al.
Z.Phys.C 34 (1987) 157, 1987.
Inspire Record 235576 DOI 10.17182/hepdata.15813

None

1 data table
Table 1

Systematic errors are at least 25 pct.


Charged Particle Multiplicity Distributions in $e^+ e^-$ Annihilation at 29-{GeV}: A Comparison With Hadronic Data

Derrick, M. ; Gan, K.K. ; Kooijman, P. ; et al.
Z.Phys.C 35 (1987) 323, 1987.
Inspire Record 235873 DOI 10.17182/hepdata.15773

The charged particle multiplicity distributions for two-jet events ine+e− annihilation at 29 GeV have been measured using the High Resolution Spectrometer at PEP. A Poisson distribution describes the data for both the complete event and for the single jets. In addition, no correlation is observed between the multiplicities in the two jets of an event. For fixed values of the prong number of the complete event, the multiplicity sharing between the two jets is in good agreement with a binomial distribution. The rapidity gap distribution is exponential with a slope equal to the mean rapidity density. These observations, which are consistent with a picture of independent emission of single particles, are contrasted to the results from soft hadronic collisions and conclusions are drawn about the nature of clusters.

4 data tables
Table 1

Charged Particle Multiplicity distributions for single jet and whole event from the two jet sample. The numerical values are given in the paper Derrick et al, PR D34 (86) 3304, and are coded in this database as (<a href=http://durpdg.dur.ac.uk/scripts/reacsearch.csh/TESTREAC/red+1437> RED = 1437 </a>).

Table 2

Single Jet Mean Multiplicities.

Table 3

Total event charged multiplicities.

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Measurement of $J/\psi$ and $\psi^\prime$ Real Photoproduction on $^{6}$Li at a Mean Energy of 90-{GeV}

The NA14 collaboration Barate, R. ; Bareyre, P. ; Bloch, D. ; et al.
Z.Phys.C 33 (1987) 505, 1987.
Inspire Record 235579 DOI 10.17182/hepdata.15814

Inelastic and elasticJ/ψ (3097) photoproduction on Li6 are measured at a mean γ energy of 90 GeV in an open spectrometer. TheJ/ψ are identified by their decays intoμ+μ− ore+e−. A signal of ψ′(3685) intoμ+μ− andJ/ψπ+π− is also seen. The inelastic cross-section withZ=Eψ/Eγ<0.9 is compared in shape and magnitude with the colour singlet model of photon-gluon fusion.

2 data tables
Table 1

DIMUON TRIGGER, INELASTIC MEANS Z < 0.9.

Table 2

ELECTRON TRIGGER, INELASTIC MEANS Z < 0.9.


Inclusive $\pi^0$ Production in $\pi^+ p$, $K^+ p$ and $p p$ Interactions at 250-{GeV}/$c$

The NA22 collaboration Aiinenko, I.V. ; Atayan, M.R. ; Belokopytov, Yu. A. ; et al.
Z.Phys.C 35 (1987) 7, 1987.
Inspire Record 240345 DOI 10.17182/hepdata.40897

Data are presented on inclusive π0 production in the forward c.m. hemisphere (xF>0.025) in π+p,K+p andpp interactions at 250 GeV/c. These data are compared to results at other energies and interpreted in terms of quark-parton models.

4 data tables
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COMPARISON OF pi+-, K+- AND p, anti-p PRODUCTION IN THE CENTRAL RAPIDITY REGION IN HADRON HADRON COLLISIONS AND IN e+ e- ANNIHILATION

The TPC/Two Gamma collaboration Aihara, H. ; Alston-Garnjost, M. ; Avery, R.E. ; et al.
Phys.Lett.B 184 (1987) 114-118, 1987.
Inspire Record 236029 DOI 10.17182/hepdata.30201

We compare the p T dependence of pion, kaon and proton production cross sections in the central rapidity region in e + e − annihilation events and in proton-proton collisions at ISR energies. We find similarities both in the p T dependence of cross sections and in the particle composition as a function of p T , in agreement with the hypothesis of a universal mechanism of particle production.

1 data table
Table 1

Numerical values requested from authors.


Inclusive $\pi^0$ and Eta0 Production in $\pi^- p$ Interactions at 360-{GeV}/$c$

The NA27 & LEBC-EHS collaborations Aguilar-Benitez, M. ; Bailly, J.L. ; Baland, J.F. ; et al.
Z.Phys.C 34 (1987) 419, 1987.
Inspire Record 234876 DOI 10.17182/hepdata.15777

Theπ0 andη0 production is studied inπ−p interactions at 360 GeV/c. The cross section forπ0 production in the forward hemisphere (X>0) isσ(π0)=(49.7 ± 1.0 ± 1.1) mb and for η withX>0.1,Nch>2,σ(η0)=(3.1 ± 0.5) mb. The ratio of theπ0 toη0 cross section forX>0.1,Nch>2 isσ(π0)/σ(η0). Results on FeynmanX andpT distributions are presented. The data were obtained using the European Hybrid Spectrometer EHS and the bubble chamber LEBC at CERN.

6 data tables
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Measurement of the Photon Structure Function F2 (Gamma) (x, Q**2) in the Region 0.2-GeV**2 < 7-GeV**2

The TPC/Two Gamma collaboration Aihara, H. ; Alston-Garnjost, M. ; Avery, R.E. ; et al.
Z.Phys.C 34 (1987) 1, 1987.
Inspire Record 234578 DOI 10.17182/hepdata.15803

We present a measurement of the photon structure functionF2γ in the reactionee→eeX forQ2 in the range 0.2<Q2<7 GeV2, using 9,200 multihadron events obtained with the TPC/Two-Gamma detector at PEP. The data have been corrected for detector effects using a regularized unfolding procedure and are presented as a function ofx andQ2. The structure function shows scaling in the region 0.3<Q2<1.6 GeV2,x<0.3 and rises for higherQ2. AtQ2=5.1 GeV2 the results are compared with QCD and, within the scheme of Antoniadis and Grunberg, rather conservative bounds for the QCD scale parameter of 133±50<\(\Lambda _{\overline {{\rm M}S} } \)<268±98 MeV are obtained. A study of the final state structure shows that the rise ofF2γ is consistent with being entirely due to the pointlike component of the photon.

11 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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