Multiplicity fluctuations in finite rapidity windows. Intermittency or quantum statistical correlation?

Carruthers, Peter; Friedländer, E. M.; Shih, Chia C.; Weiner, R.M.

doi:10.1016/0370-2693(89)90350-x

Cited by 91 publications

(33 citation statements)

References 20 publications

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“…Good agreement was found between the theory and measurements at lower rank of the factorial moments (i = 2, 3) for the NA22 experiment. There are also some indications for the connection between the Bose-Einstein correlation and the intermittency [18][19][20][21]. This draws attention to the role of the short-range correlations in the factorial moments.…”

Section: Scaled Factorial Momentsmentioning

confidence: 92%

Effect of Bose-Einstein correlations on intermittency in ultrarelativistic nucleus-nucleus collisions

et al. 1994

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The role of quantum correlations, the rescattering of the produced particles and mixing of events with various impact parameters on intermittency in nucleus-nucleus collisions at 200 A GeV is studied in the framework of the RQMD model. We generated an RQMD data sample with Bose-Einstein correlations of identical pion pairs included. One can get quantitative agreement with the measured intermittent behaviour of the pion pseudorapidity spectra if these quantum correlations are taken into account. MotivationsTo investigate properties of dynamical fluctuations in relativistic heavy ion collisions Bialas and Peschanski proposed to study the scaled factorial moments of the (pseudo) rapidity distribution of the final state particles and introduced the concept of intermittency into high energy nuclear physics [ 1 ]. The effect of intermittency is quantified by the power law behaviour of the scaled factorial moments (Fi) and loosely regarded as having fractal properties.Intermittent behaviour of spectra was observed in several experiments. After an early analysis of cosmic-ray events this effect has been observed in e+e -, muon-hadron, hadron-hadron, hadron-nucleus and nucleus-nucleus collisions [2], thus it seems to I E-mail: KUN@HUKLTE51.BITNET. Fax: 36-52-416181. be a universal feature of particle production at high energies.It is an important question whether the intermittency can be understood on the basis of our conventional physical knowledge or we should suspect new physics behind it. For answering this question it is necessary to study whether the commonly used models of particle production can account for the general features of the observed intermittent behaviour. This problem was studied using Fritiof, Jetset, Herwig, Pythia and Venus codes which generally give a good description of the single particle features observed in experiments. However, it was found that intermittency effects are much stronger in the measured data than in these Monte Carlo simulations. It means quantitatively that the anomalous fractal dimension~ (di) calculated from the experimental data are several times larger than those calculated from the models, otherwise, practically there was no intermittency (di "~ O) in several cases in the model calculations [2,8]. Fur-0370-2693/94/$07.00 (~)

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Section: Scaled Factorial Momentsmentioning

confidence: 92%

Effect of Bose-Einstein correlations on intermittency in ultrarelativistic nucleus-nucleus collisions

et al. 1994

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“…Several speculative measure, some conventional and a few exotic, are adopted to interpret the intermittency results. As for example, the intermittency phenomenon can be explained in terms of ordinary Bose-Einstein type of correlation (BEC) [3,4], collective effects such as the Cerenkov gluon emission or Mach shock-wave formation [5,6], the QCD parton shower cascading process [7], a non-thermal phase transition similar to that observed in the spin glass system [8], and last but not the least in terms of a thermal phase transition from the quark-gluon plasma (QGP) to a hadronic state [9,10]. However, till date none of the above explanations can fully explain all experimental results.…”

Section: Introductionmentioning

confidence: 99%

Multifractal detrended fluctuation analysis of particle density fluctuations in high-energy nuclear collisions

Mali

Sarkar

Ghosh

et al. 2015

Physica A: Statistical Mechanics and its Applications

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“…Plenty of new and interesting experimental results have been put in front of us. Various efforts [3][4][5] have been taken to understand the physics behind these experimental findings.In this respect, it merits attention that, in almost all the cases, the logarithm of SFM's versus that of the cell width rises as the decreasing of (or as the increasing of partition number M of phase space, where M" / , is the total phase space region in consideration), when M is not very big. There is, however, a noticeable exception, i.e.…”

mentioning

confidence: 97%

“…Plenty of new and interesting experimental results have been put in front of us. Various efforts [3][4][5] have been taken to understand the physics behind these experimental findings.…”

mentioning

confidence: 97%

On the influence of momentum conservation upon the scaling behaviour of factorial moments in high energy multiparticle production

Lianshou

Zhang

Deng

1997

Zeitschrift f�r Physik C Particles and Fields

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The experimental results on the falling down of scaled factorial moments in azimuthal variable is studied in some detail. It is shown that this phenomenon may be referred to the influence of transverse momentum conservation. The existing experimental data from DELPHI, EMU08, NA22 and UA1 are successfully explained. Various methods are proposed to partly eliminate this influence and rule out the 'falling down' of factorial moments.Since the last decade the anomalous scaling of scaled factorial moments (SFM's) or intermittency [1] has been studied extensively [2] with the aim of exploring the possible existence of dynamical fluctuation or multifractal structure of multiparticle spectrum in high energy collision processes. The corresponding experiments have been performed in various kind of collisions -from e>-e\, hadron-hadron, hadron-nucleus to nucleus-nucleus. Plenty of new and interesting experimental results have been put in front of us. Various efforts [3][4][5] have been taken to understand the physics behind these experimental findings.In this respect, it merits attention that, in almost all the cases, the logarithm of SFM's versus that of the cell width rises as the decreasing of (or as the increasing of partition number M of phase space, where M" / , is the total phase space region in consideration), when M is not very big. There is, however, a noticeable exception, i.e. the logarithm of SFM's with azimuthal angle as variable fall down as the increasing of lnM in the first few points [6-9], cf. Fig. 1. This prevents us from properly understanding the physics behind the scaling behaviour of SFM's found in experiments.The aim of this paper is to study this phenomenon in some detail. We will show that the falling down of SFM's in azimuthal angle may be referred to the influence of momentum conservation (MmCn) constraint in the collision processes. Various methods will be implemented to Fig. 1. Scaled factorial moments with azimuthal angle as variable, showing the 'falling down' phenomenon. Data taken from [6-9]

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Multiplicity fluctuations in finite rapidity windows. Intermittency or quantum statistical correlation?

Cited by 91 publications

References 20 publications

Effect of Bose-Einstein correlations on intermittency in ultrarelativistic nucleus-nucleus collisions

Effect of Bose-Einstein correlations on intermittency in ultrarelativistic nucleus-nucleus collisions

Multifractal detrended fluctuation analysis of particle density fluctuations in high-energy nuclear collisions

On the influence of momentum conservation upon the scaling behaviour of factorial moments in high energy multiparticle production

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