Allasia, D.
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INVESTIGATION OF ELASTIC ELECTRON - PROTON SCATTERING IN THE REGION OF SQUARED MOMENTUM TRANSFERS 0.12-F**-2 <= q**2 <= 0.5-F**-2

Akimov, Yu.K. ; Arvanov, A.N. ; Badalian, G.V. ; et al.
Sov.J.Nucl.Phys. 29 (1979) 474, 1979.
Inspire Record 133691 DOI 10.17182/hepdata.18481

None

1 data table
Table 1

No description provided.


Production of $J/\psi$ in 16-{GeV} and 22-{GeV} $\pi^-$ Cu Collisions

LeBritton, J. ; McCal, D. ; Melissinos, A.C. ; et al.
Phys.Lett.B 81 (1979) 401-404, 1979.
Inspire Record 7053 DOI 10.17182/hepdata.50278

We have measured the inclusive production of J ψ in 16 and 22 GeV π − copper collisions in a wide aperture magnetic spectrometer. The cross section per Cu nucleus for x > 0 corrected for branching ratio is 64 ± 38 nb at 16 GeV and 196 ± 38 nb at 22 GeV. As threshold is approached, the mean values of the Feynman x distribution increase and the cross section for J ψ production drops steeply. This can be understood in terms of the quark-fusion model where the antiquark content of the pion makes an increasingly significant contribution as M 2 s increases.

2 data tables

Measurement of the Energy and X Dependence of the Y Distributions in Anti-neutrino Interactions

Benvenuti, A.C. ; Bobisut, F. ; Cline, D. ; et al.
Phys.Rev.Lett. 42 (1979) 149, 1979.
Inspire Record 7154 DOI 10.17182/hepdata.21899

Analysis of 5180 ν¯ interactions shows a variation with energy of the inelasticity (y) distributions over the range 10 to 220 GeV and a dependence on the scaling variable x. From these data are obtained the approximate x dependence of the sea quarks and a limit on the strength of right-handed coupling between the u quark and a massive b quark.

1 data table
Table 1

No description provided.


rivet Analysis
Production Characteristics of the F Meson

The DASP collaboration Brandelik, R. ; Braunschweig, W. ; Martyn, H.U. ; et al.
Phys.Lett.B 80 (1979) 412-418, 1979.
Inspire Record 132410 DOI 10.17182/hepdata.27370

Inclusive cross sections of η production by e + e - annihilation for c.m. energies between 4.0 and 5.0 GeV are presented. The η production is shown to be correlated with the production of a weakly decaying particle, indicating that its main source is F production. At the 4.42 GeV resonance it is correlated with a low energy photon, suggesting F F ∗ or F ∗ F ∗ production. A mass determination of the F is made at 4.42 GeV using the F → ηπ decay channel.

1 data table
Table 1

NUMERICAL VALUES MEASURED FROM GRAPH IN PREPRINT. A CHARM MODEL (METHOD 2) GAVE CONSISTENT RESULTS FOR BACKGROUND SEPARATION.


Production of $\psi$ and $\psi^\prime$ Mesons in $\pi^- N$ Scattering at 150-{GeV}/$c$

Abolins, M.A. ; Barate, R. ; Bareyre, P. ; et al.
Phys.Lett.B 82 (1979) 145, 1979.
Inspire Record 133175 DOI 10.17182/hepdata.27333

In a large-acceptance spectrometer, muon pairs and associated hadrons were observed with μμ masses up to 10 GeV/ c 2 and ΔM M = 0.015 resolution. We report here on the production of 4000 J/ ψ and 80 ψ ′ mesons.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Inclusive Interactions of High-Energy Neutrinos and anti-neutrinos in Iron

de Groot, J.G.H. ; Hansl, T. ; Holder, M. ; et al.
Z.Phys.C 1 (1979) 143, 1979.
Inspire Record 133261 DOI 10.17182/hepdata.16826

We present results on charged current inclusive neutrino and antineutrino scattering in the neutrino energy range 30–200 GeV. The results include a) total cross-sections; b)y distributions; c) structure functions; and d) scaling violations observed in the structure functions. The results, as well as their comparison with the results of electron and muon inclusive scattering, are in agreement with the expectations of the quark parton model and QCD.

8 data tables
Table 1

THE VALUES OF Q2 CORRESPONDING TO THE 6 DATA POINTS ARE 1.126,2.11,3.52,4.92,6.33,7.74.

Table 2

THE VALUES OF Q2 CORRESPONDING TO THE 7 DATA POINTS ARE 1.27,2.25,4.22,7.04,9.85,12.66,15.48.

Table 3

THE VALUES OF Q2 CORRESPONDING TO THE 8 DATA POINTS ARE 2.11,3.75,7.04,11.72,16.4,21.1,25.8,30.5.

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Neutron-Proton Forward Angle Elastic Cross-Sections at 790-MeV

Carlini, R. ; Dieterle, B. ; Donahue, J. ; et al.
Phys.Rev.Lett. 41 (1978) 1341-1344, 1978.
Inspire Record 136558 DOI 10.17182/hepdata.20861

High-statistics measurements of the absolute differential cross section for n−p scattering have been made over neutron c.m.-system scattering angles 9.5°<θ*<64.5°. The statistical error is 1.7 to 3.3% for 2°-wide angular bins, and the systematic error is 2.7 to 3.3%. The cross section is fitted by dσdΩ*=A exp(bt), with A=10.27±0.36 mb/sr, b=5.00±0.05, and 0.01<−t<0.39 (GeV/c)2. For the ratio of the real to the imaginary part of the forward-scattering amplitude we obtained αn>~−0.43±0.04, consistent with other less precise determinations of αn.

1 data table
Table 1

EXPONENTIAL FIT TO D(SIG)/DOMEGA OVER -T = 0.01 TO 0.39 GEV**2 (THETA = 9.5 TO 64.5 DEG).


Scaling properties of high mass symmetric hadron and pion pair production in proton - beryllium collisions

Jostlein, H. ; Engelmann, Roderich J. ; Fisk, R.J. ; et al.
Phys.Rev.Lett. 42 (1979) 146, 1979.
Inspire Record 132764 DOI 10.17182/hepdata.42603

We present measurements of the production symmetric high-mass hadron and pion pairs by protons of 200, 300, and 400 GeV, incident on a beryllium target. The two-particle invariant cross section for pion production can be described by the function E1E2d6σdp13dp23=(1.7×10−28)pt−8.4(1−xt)14 cm2/GeV4 (where pt is the mean pt of the two hadrons). Functions of the same form have been used in describing single-pion inclusive production. Equality of the exponents of pt in the two processes is observed, confirming the role of smearing contributions to single-hadron cross sections.

2 data tables
Table 1

E*D3(SIG)/D3(P) is fitted by CONST*(1-XT)**POWER*PT**POWER.

Table 2

E1*E2*D6(SIG)/D3(P1)/D3(P2) is fitted by CONST*(1-XT)**POWER*PT**POWER, where PT is (pt1 + pt2)/2.


Hadronic Cross-sections Study in $e^+ e^-$ Collisions From 1.350-{GeV} to 2.125-{GeV}

Cosme, G. ; Dudelzak, B. ; Grelaud, B. ; et al.
Nucl.Phys.B 152 (1979) 215-231, 1979.
Inspire Record 133311 DOI 10.17182/hepdata.34784

The results of the first experiment performed at DCI in e + e − annihilations in the c.m. energy range 1.350–2.125 GeV region are presented. The cross sections of various multipion channels are extracted. Significant structure appears in some specific channels. A relatively narrow resonance around 1.660 GeV decaying into 3 π 's is found. Charged and neutral multiplicities, and also the ratio R are given.

2 data tables
Table 1

PEAK CROSS SECTION FROM FIT WITH BREIT-WIGNER RESONANCE PLUS CONSTANT BACKGROUND TO ISOSCALAR JPC = 1-- STRUCTURE OF MASS 1652 +- 17 MEV AND WIDTH OF 42 +- 17 MEV.

Table 2

R VALUE SEEMS CONSTANT OVER THIS ENERGY RANGE.


Particle and Anti-particle Production by 200 GeV/c Protons in the Charged Hyperon Beam at the CERN SPS

The Bristol-Geneva-Heidelberg-Orsay-Rutherford-Strasbourg collaboration Bourquin, M. ; Brown, Robert M. ; Chatelus, Y. ; et al.
Nucl.Phys.B 153 (1979) 13-38, 1979.
Inspire Record 133315 DOI 10.17182/hepdata.34699

A charge hyperon beam has been brought into operation at the CERN SPS. Particles are identified by a DISC Čerenkov counter, and decay products are analysed by a magnetic spectrometer. Cross sections for the inclusive production of π + , K + , p , Σ + , Σ − , ζ − , d, and π − , K − , p , Σ + , Σ − , ζ − , ω − , d in the forward direction have been measured at laboratory momenta between 70 and 130 GeV/ c . This range of momenta corresponds to 0.35 ⩽ x ⩽ 0.66 for an incident proton momentum of 200 GeV/ c . Antihyperon ( Σ − , ζ − , Σ + ) and Σ + and ω − fluxes have been measured for the first time in a hyperon beam.

13 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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