HEPData Search

Showing 10 of 149 results

Production of K0 and Lambda in hadronic Z decays

The ALEPH collaboration Buskulic, D. ; Casper, D. ; De Bonis, I. ; et al.

Z.Phys.C 64 (1994) 361-374, 1994.

Inspire Record 375060 DOI 10.17182/hepdata.48239

Measurements of the inclusive cross-sections forK0 and Λ production in hadronic decays of the Z are presented together with measurements of two-particle correlations within pairs of Λ andK0. The results are compared with predictions from the hadronization models Jetset, based on string fragmentation, and Herwig, based on cluster decays. TheK0 spectrum is found to be harder than predicted by both models, while the Λ spectrum is softer than predicted. The correlation measurements are all reproduced well by Jetset, while Herwig misses some of the qualitative features and overestimates the size of the\(\Lambda \bar \Lambda \) correlation. Finally, the possibility of Bose-Einstein correlation in theKS0KS0 system is discussed.

7 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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rivet Analysis
Production of Lambda and Lambda anti-Lambda correlations in the hadronic decays of the Z0

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

Phys.Lett.B 318 (1993) 249-262, 1993.

Inspire Record 360638 DOI 10.17182/hepdata.48369

An analysis of the production of the Λ baryon in the hadronic decays of the Z 0 is presented, based on about 993K multihadronic events collected by the DELPHI detector at LEP during 1991 and 1992. The differencial cross section of the Λ and the correlations between Λ and Λ produced in the same event are compared to current models, based both on string fragmentation and on cluster decay. The predictions of the string fragmentation model are found to give satisfactory agreements with the data, clearly better than those of the cluster model.

6 data tables

Table 1

No description provided.

Table 2

Combined LAMBDA and LAMBDABAR multiplicity.

Table 3

Errors contain systematic uncertainties.

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Neutral strange particle production in K+ and pi+ collisions with Al and Au nuclei at 250-GeV/c

The NA22 collaboration Botterweck, F. ; Charlet, M. ; Chliapnikov, P.V. ; et al.

Z.Phys.C 55 (1992) 373-382, 1992.

Inspire Record 333307 DOI 10.17182/hepdata.14584

Data are presented on inclusiveKs0 and Λ production inK+ and π+ collisions with Al and Au nuclei at 250 GeV/c. Results are given on total inclusive cross sections and theA dependence, as well as on distributions in Feynman-xF, rapidityy and transverse momentum. Ratios ofKS0 and of Λ to π+ production are presented. The data are compared with predictions of the quark-parton model FRITIOF.

50 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Lepton asymmetry in W decays from anti-p p collisions at S**(1/2) = 1.8-TeV

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

Phys.Rev.Lett. 68 (1992) 1458-1462, 1992.

Inspire Record 323033 DOI 10.17182/hepdata.19880

The charge asymmetry of leptons from W-boson decay has been measured using p¯p data from the Collider Detector at Fermilab at √s =1.8 TeV. The observed asymmetry is well described by most of the available parton distributions.

3 data tables

Table 1

Electrons in the central region.

Table 2

Muons in the central region.

Table 3

Plug electrons.

Measurement of the Inclusive Charged Current Cross-section for Neutrino and Anti-neutrino Scattering on Isoscalar Nucleons

Auchincloss, Priscilla S. ; Blair, R. ; Haber, C. ; et al.

Z.Phys.C 48 (1990) 411-432, 1990.

Inspire Record 27761 DOI 10.17182/hepdata.15124

This paper reports on measurements of the total cross section for the inclusive reaction vμ+N, as a function of incident energy. Neutrinos and antineutrinos with energy in the range 3

7 data tables

Table 1

Data from 100 to 300 GeV are combined with previous measurements and errors have statistical and systematics combined.

Table 2

Cross section using direct normalization.

Table 3

Cross section using direct normalization.

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Neutral kaon production in K+ p and pi+ p interactions at 250-GeV/c

The EHS/NA22 collaboration Ajinenko, I.V. ; Albert, L. ; Belokopytov, Yu. A. ; et al.

Z.Phys.C 46 (1990) 525-536, 1990.

Inspire Record 302184 DOI 10.17182/hepdata.15191

The inclusive production of neutral kaons is studied inK+p and π+p interactions at 250 GeV/c. Total and semi-inclusive cross sections and average kaon multiplicities are presented and compared with the data at lower energies. The longitudinal and transverse momentum distributions and their energy dependence are analyzed. The results are interpreted in the framework of recent parton models.

12 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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rivet Analysis
QUARK HADRONIZATION PROBED BY K0 MESONS

The HRS collaboration Abachi, S. ; Derrick, M. ; Kooijman, P. ; et al.

Phys.Rev.D 41 (1990) 2045, 1990.

Inspire Record 280958 DOI 10.17182/hepdata.23000

Total and differential K0 corss sections are presented from e+e− collisions at s=29 GeV in the High Resolution Spectrometer detector. K0 and charged-particle distributions are compared in a study of the hadronization of quarks of known flavor. Ecents of the reaction e+e−→cc¯ are tagged by identifying D*'s while uu¯, dd¯, or ss¯ events are tagged through the identification of a charged particle with fractional momentum near 1. Parton-shower models with cluster and string fragmentation are compared with these data. Also, certain particle scaling tests are performed using the quark-flavor tags. In addition, K0 production in two- and three-jet events is compared to these models.

6 data tables

Table 1

Corrected Cross Sections (Lund MC used to extrapolate).

Table 2

R value for K0 production.

Table 3

K0 differential cross section as function of the fractional energy.

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Lambda0 and anti-Lambda0 Production from Proton - anti-Proton Collisions at s**(1/2) = 1.8-TeV

The E735 collaboration Banerjee, S. ; Beery, P.D. ; Biswas, N.N. ; et al.

Phys.Rev.Lett. 62 (1989) 12, 1989.

Inspire Record 24875 DOI 10.17182/hepdata.20125

The transverse-momentum spectra of lambdas (Λ0, Λ¯0) produced in the central region has been measured in p¯p collisions at s=1.8 TeV at the Fermilab Collider. We find that the average transverse momentum of the lambdas increases more rapidly with center-of-mass energy than that of charged particles, and the ratio of lambdas to charged particles increases as a function of center-of-mass energy.

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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THE STUDY OF INCLUSIVE CHARACTERISTICS OF anti-d d INTERACTIONS AT 12-GeV/c

Batyunya, B.V. ; Boguslavsky, I.V. ; Bruncko, D. ; et al.

JINR-P1-87-849, 1987.

Inspire Record 253758 DOI 10.17182/hepdata.9416

None

8 data tables

Table 1

THE BETTER FIT FOR PI- AND BARIONBAR IS THE SUM OF TWO EXPONENT: A*EXP(-B1*PT**2)+D*EXP(-B2*PT**2).FOR PI- B1=30+-4 AND B2=6.3+-.3 .FOR BARIONBAR B1=46+-18 AND B2=3.9+-.5.

Table 2

No description provided.

Table 3

No description provided.