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Central Mg + Mg collisions with Lambda production at a momentum of 4.3-GeV/c per nucleon

Avramenko, S.A. ; Abdurakhimov, A.U. ; Aksinenko, V.D. ; et al.
Sov.J.Nucl.Phys. 55 (1992) 400-407, 1992.
Inspire Record 319240 DOI 10.17182/hepdata.38716

None

2 data tables
Table 1

CENTRAL COLLISIONS.

Table 2

CENTRAL COLLISIONS.


Experimental study of 1-GeV proton fission processes in U-238 nuclei using photoemulsions

Filatov, N.P. ; Solyakin, G.E. ; Zakharov, Valentin I. ; et al.
LENINGRAD-91-1683, 1991.
Inspire Record 323566 DOI 10.17182/hepdata.37951

None

1 data table
Table 1

No description provided.


Cross-sections of the H-3 ---> He-3 reaction on hydrogen, carbon, aluminum, copper and lead at 9-gev/c

Avramenko, S.A. ; Belikov, Yu.A. ; Galperin, A.G. ; et al.
JINR-P1-91-239, 1991.
Inspire Record 319463 DOI 10.17182/hepdata.38697

None

1 data table
Table 1

Axis error includes +- 0.0/0.0 contribution (?////).


Topological characteristics of the charge exchange reaction H-3 ---> He-3 on neon and magnesium nuclei at 9-GeV/c

Avramenko, S.A. ; Aksinenko, V.D. ; Anikina, M.Kh. ; et al.
JINR-P1-91-240, 1991.
Inspire Record 319449 DOI 10.17182/hepdata.38713

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Charge exchange Li-7 ---> Be-7 cross-sections at 21-GeV/c on H, C, Al, Cu, Pb nuclei

Avramenko, S.A. ; Belikov, Yu.A. ; Golokhvastov, A.I. ; et al.
JINR-P1-91-206, 1991.
Inspire Record 319270 DOI 10.17182/hepdata.38715

None

1 data table
Table 1

CHARGE EXCHANGE INCLUSIVE CROSS SECTION.


A Study of K0(s) production in Z0 decays

The OPAL collaboration Alexander, G. ; Allison, J. ; Allport, P.P. ; et al.
Phys.Lett.B 264 (1991) 467-475, 1991.
Inspire Record 316151 DOI 10.17182/hepdata.29375

The production of K 0 mesons in e + e − interactions at center of mass energies in the region of the Z 0 mass has been investigated with the OPAL detector at LEP. The rate is found to be 2.10±0.02±0.14 K 0 , Z 0 per hadronic event. The predictions from the JETSET and HERWIG generators agree very well with both the rate and the scale invariant cross section (1/σ had β) (dσ/d x E ) for K 0 production. Comparisons of the inclusive momentum spectrum with predictions of an analytical QCD formula and with data from lower center of mass energies are presented.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

K0 multiplicity per hadronic event.


A Determination of sin**2-theta from the forward - backward asymmetry in p anti-p ---> Z0 X ---> e+ e- X interactions at s**(1/2) = 1.8-TeV

The CDF collaboration Abe, F. ; Amidei, Dante E. ; Apollinari, G. ; et al.
Phys.Rev.Lett. 67 (1991) 1502-1506, 1991.
Inspire Record 317764 DOI 10.17182/hepdata.19899

An analysis of the forward-backward asymmetry in Z0 decays using data from the Collider Detector at Fermilab at √s =1.8 TeV yields AFB=[5.2±5.9(stat)±0.4(syst)]% and sin2θ¯W =0.228−0.015+0.017(stat)±0.002(syst).

2 data tables
Table 1

Asymmetry after background and QCD corrections.

Table 2

SIN2TW derived from asymmetry measurement fully corrected for background and radiative corrections.


rivet Analysis
Measurement of the direct photon spectrum from Upsilon (1S) decays

The Crystal Ball collaboration Bizzeti, A. ; Schütte, J. ; Antreasyan, D. ; et al.
Phys.Lett.B 267 (1991) 286-292, 1991.
Inspire Record 315873 DOI 10.17182/hepdata.45174

None

1 data table
Table 1

No description provided.


A Measurement of the electroweak couplings of up and down type quarks using final state photons in hadronic z0 decays

The OPAL collaboration Alexander, G. ; Allison, J. ; Allport, P.P. ; et al.
Phys.Lett.B 264 (1991) 219-232, 1991.
Inspire Record 316154 DOI 10.17182/hepdata.48516

The production rate of final state photons in hadronic Z 0 decays is measured as a function of y cut = M ij 2 / E cm 2 the jet resolution parameter and minimum mass of the photon-jet system. Good agreement with the theoretical expectation from an O( αα s ) matrix element calculation is observed. Comparing the measurement and the prediction for y cut = 0.06, where the experimental systematic and statistical errors and the theoretical uncertainties are small, and combining this measurement with our result for the hadronic width of the Z 0 , we derived partial widths of up and down type quarks to be Γ u = 333 ± 55 ± 72 MeV and Γ d = 358 ± 37 ± 48 MeV in agreement with the standard model expectations. We compare our yield with the QCD shower models including photon radiation. At low γ cut JETSET underestimates the photon yield, and ARIADNE describes the production rate well.

2 data tables
Table 1

It is assumed that the couplings of various up quarks to be the same.

Table 2

It is assumed that the couplings of various down type quarks to be the same.


Determination of the relative branching ratios for p anti-p ---> pi+ pi- and p anti-p ---> K+ K-

The CPLEAR collaboration Adler, R. ; Angelopoulos, A. ; Apostolakis, A. ; et al.
Phys.Lett.B 267 (1991) 154-158, 1991.
Inspire Record 317491 DOI 10.17182/hepdata.48425

The ratio of the branching fractions for p p →K + K − and p p →π + π − was determined with the CPLEAR detector, by stopping antiprotons in a gaseous hydrogen target at 15 bar pressure. It was found to be BR(K + K − )/BR( π + π − )=0.205± 0.016. The fraction of P-wave annihilation at rest at this target density was deduced to be (38±9)%.

1 data table
Table 1

CONST is the fraction of P-wave annihilation in gaseous hydrogen at pressu re of 15 bar. In the SIG/SIG the statistical and systematic errors are added qu adratically.