Energy conservation constraints on multiplicity correlations in QCD jets

Meunier, J.L.; Peschanski, R.

doi:10.1007/s002880050287

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…A similar conclusion was reached from a comparison of factorial and cumulant moments in quark and gluon jets [29]. Further, a recent theoretical study [30] of energy conservation in triple-parton vertices shows that the energy conservation constraint is indeed sizeable and leads to a stronger saturation e ect. Note that the MLLA predictions used here are not from a full MLLA calculation.…”

Section: Discussionsupporting

confidence: 49%

Angular multiplicity fluctuations in hadronic Z decays and comparison to QCD models and analytical calculations

Acciarri¹,

Адриани²,

Aguilar-Benı́tez³

et al. 1998

Physics Letters B

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Local multiplicity uctuations in angular phase space intervals are studied using factorial moments measured in hadronic events at p s ' 91:2 G e V, which were collected by the l3 detector at lep. Parton shower Monte Carlo programs agree well with the data. On the other hand, rst-order QCD calculations in the Double Leading Log Approximation and the Modi ed Leading Log Approximation are found to deviate signi cantly from the data.

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Section: Discussionsupporting

confidence: 49%

Angular multiplicity fluctuations in hadronic Z decays and comparison to QCD models and analytical calculations

Acciarri¹,

Адриани²,

Aguilar-Benı́tez³

et al. 1998

Physics Letters B

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“…In particular, energy conservation constraints are just as severe in small phase space windows as in total phase space (see [205]). This problem has not yet been solved.…”

Section: Multiplicity Of Three-jet Eventsmentioning

confidence: 99%

Hadron multiplicities

2001

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We review results on hadron multiplicities in high energy particle collisions. Both theory and experiment are discussed. The general procedures used to describe particle multiplicity in Quantum Chromodynamics (QCD) are summarized. The QCD equations for the generating functions of the multiplicity distributions are presented both for fixed and running coupling strengths. The mean multiplicities of gluon and quark jets, their ratio, higher moments, and the slopes of multiplicities as a function of energy scale, are among the main global features of multiplicity for which QCD results exist. Recent data from high energy e + e − experiments, including results for separated quark and gluon jets, allow rather direct tests of these results. The theoretical predictions are generally quite successful when confronted with data. Jet and subjet multiplicities are described. Multiplicity in limited regions of phase space is discussed in the context of intermittency and fractality. The problem of singularities in the generating functions is formulated. Some special features of average multiplicities in heavy quark jets are described.

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“…Energy-conservation effects are indeed sizeable. 24 Recent ZEUS results will be presented here by L. Zawiejski and the state of understanding will be summarized by W. Ochs.…”

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confidence: 99%