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Production of pi+, K+, K0, K*0, phi, p and Lambda-0 in Hadronic Z0 Decays
High Energy Physics - Experiment · Submitted 24 May 1998
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Differences are observed at high x_p, providing direct evidence that higher-momentum hadrons are more likely to contain a primary quark or antiquark.
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The abstract, sentence by sentence
We have measured the differential production cross sections as a function of scaled momentum x_p=2p/E_cm of the identified hadron species pi+, K+, K0, K*0, phi, p, Lambda0, and of the corresponding antihadron species in inclusive hadronic Z0 decays, as well as separately for Z0 decays into light (u, d, s), c and b flavors. Clear flavor dependences are observed, consistent with expectations based upon previously measured production and decay properties of heavy hadrons. These results were used to test the QCD predictions of Gribov and Lipatov, the predictions of QCD in the Modified Leading Logarithm Approximation with the ansatz of Local Parton-Hadron Duality, and the predictions of three fragmentation models. Ratios of production of different hadron species were also measured as a function of x_p and were used to study the suppression of strange meson, strange and non-strange baryon, and vector meson production in the jet fragmentation process. The light-flavor results provide improved tests of the above predictions, as they remove the contribution of heavy hadron production and decay from that of the rest of the fragmentation process. In addition we have compared hadron and antihadron production as a function of x_p in light quark (as opposed to antiquark) jets. Differences are observed at high x_p, providing direct evidence that higher-momentum hadrons are more likely to contain a primary quark or antiquark. The differences for pseudoscalar and vector kaons provide new measurements of strangeness suppression for high-x_p fragmentation products.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We have measured the differential production cross sections as a function of scaled momentum x_p=2p/E_cm of the identified hadron species pi+, K+, K0, K*0, phi, p, Lambda0, and of the corresponding antihadron species in inclusive hadronic Z0 decays, as well as separately for Z0 decays into light (u, d, s), c and b flavors. | contribution 0.92 | 0.98 | 0.07 | asserted 1.00 |
| s1 | Clear flavor dependences are observed, consistent with expectations based upon previously measured production and decay properties of heavy hadrons. | result 0.72 | 0.88 | 0.20 | asserted 0.59 |
| s2 | These results were used to test the QCD predictions of Gribov and Lipatov, the predictions of QCD in the Modified Leading Logarithm Approximation with the ansatz of Local Parton-Hadron Duality, and the predictions of three fragmentation models. | method 0.60 | 0.79 | 0.06 | asserted 0.97 |
| s3 | Ratios of production of different hadron species were also measured as a function of x_p and were used to study the suppression of strange meson, strange and non-strange baryon, and vector meson production in the jet fragmentation process. | contribution 0.66 | 0.97 | 0.07 | asserted 1.00 |
| s4 | The light-flavor results provide improved tests of the above predictions, as they remove the contribution of heavy hadron production and decay from that of the rest of the fragmentation process. | interpretation 0.84 | 0.68 | 0.09 | asserted 0.99 |
| s5 | In addition we have compared hadron and antihadron production as a function of x_p in light quark (as opposed to antiquark) jets. | contribution 0.94 | 0.96 | 0.04 | asserted 0.97 |
| s6 | Differences are observed at high x_p, providing direct evidence that higher-momentum hadrons are more likely to contain a primary quark or antiquark. | interpretation 0.55 | 0.96 | 0.26 | asserted 0.97 |
| s7 | The differences for pseudoscalar and vector kaons provide new measurements of strangeness suppression for high-x_p fragmentation products. | result 0.90 | 0.95 | 0.13 | asserted 1.00 |
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The paper
Original abstract
We have measured the differential production cross sections as a function of scaled momentum x_p=2p/E_cm of the identified hadron species pi+, K+, K0, K*0, phi, p, Lambda0, and of the corresponding antihadron species in inclusive hadronic Z0 decays, as well as separately for Z0 decays into light (u, d, s), c and b flavors. Clear flavor dependences are observed, consistent with expectations based upon previously measured production and decay properties of heavy hadrons. These results were used to test the QCD predictions of Gribov and Lipatov, the predictions of QCD in the Modified Leading Logarithm Approximation with the ansatz of Local Parton-Hadron Duality, and the predictions of three fragmentation models. Ratios of production of different hadron species were also measured as a function of x_p and were used to study the suppression of strange meson, strange and non-strange baryon, and vector meson production in the jet fragmentation process. The light-flavor results provide improved tests of the above predictions, as they remove the contribution of heavy hadron production and decay from that of the rest of the fragmentation process. In addition we have compared hadron and antihadron production as a function of x_p in light quark (as opposed to antiquark) jets. Differences are observed at high x_p, providing direct evidence that higher-momentum hadrons are more likely to contain a primary quark or antiquark. The differences for pseudoscalar and vector kaons provide new measurements of strangeness suppression for high-x_p fragmentation products.
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References
How the literature uses it
13 arXiv papers cite this in 18 sentences
Papers citing it · 9 sentences without a confident label
Uses its data or values 5 papers
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Parameters characterizing the FFs of quarks and gluons into neutral mesons, as introduced in Eq. ([ref]), are determined through standard $χ^2$ minimization using world data [ref] and BESIII data [ref] .
A global analysis of $\pi^0$, $K_S^0$ and $\eta$ fragmentation functions with BESIII data · Fitting framework · 1.00
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As for SIA, we include results from CERN (ALEPH [ref] , DELPHI at 91.2 GeV [ref] , OPAL [ref] ), from DESY (TASSO at 14, 22, and 34 GeV [ref] , 33.3 GeV [ref] , 34.8 and 42.1 GeV [ref] , ARGUS [ref] , CELLO [ref] ), from SLAC (MARK II [ref] , HRS [ref] , SLD [ref] ), and from KEK (Belle [ref] ).
First next-to-next-to-leading-order extraction of fragmentation functions for Lambda hyperons · Choice of experimental data · 1.00
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We tune the parameters of the string fragmentation function in Pythia 8 to a set of sensitive Lep and Slc measurements at the $Z$-boson peak produced by Aleph [ref] , Delphi [ref] , L3 [ref] , Opal [ref] and Sld [ref] .
Estimating QCD uncertainties in Monte Carlo event generators for gamma-ray dark matter searches · Tuning · 0.99
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As the SLD CRID proved, it is possible to reach the ultimate goal [ref] .
A gaseous RICH detector for SiD or ILD · Conclusion · 1.00
Cites it as background 1 paper
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The details of the perturbative radiation phase have been studied at previous colliders (Tevatron [ref] , HERA [ref] ), and the various parameters of the parton fragmentation models have been tuned to match jet data from $$ collisions, collected mostly at LEP [ref] and SLC [ref] .
Measurement of jet substructure observables in $\mathrm{t\overline{t}}$ events from proton-proton collisions at $\sqrt{s} =$ 13TeV · Introduction · 0.94
Discussion
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