Two-particle correlations and the origin of intermittency in muon-nucleon interactions

Derado, I.; Jancsó, Gábor; Schmitz, N.

doi:10.1007/bf01474727

Cited by 20 publications

(16 citation statements)

References 8 publications

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“…Similar features, but based on measurements of factorial moments, were observed in other experiments [12] and, mainly on qualitative grounds, taken as evidence for the large influence of the Bose-Einstein effect on all-charge correlations in small phase space domains 5 . In the next section, we add quantitative support to those earlier observations, showing that algorithms which simulate BEC indeed allow a quite successful description of the measurements.…”

Section: Like-sign and All-charge Cumulantssupporting

confidence: 82%

“…Further studies of the dependence on particle charge confirm that, as conjectured in [8], correlations between hadrons with the same charge play an increasingly important role as ∆ decreases, thus pointing to the influence of Bose-Einstein (BE) interference effects [9,10]; for a recent review see [11]. In contrast, correlations in multiplets composed of particles with different charges, which are more sensitive to multiparticle resonance decays than like-sign ones, tend to saturate in small phase space domains [12,13].…”

Section: Introductionsupporting

confidence: 74%

“…Large discrepancies, already discussed in [22] and for factorial moments in [12], are seen for the model without BEC. Inclusion of BE-effects using the BE 32 algorithm leads to considerably better agreement, in particular in domains of y, y × Φ and y × Φ × ln p T .…”

Section: Model Comparisonmentioning

confidence: 57%

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Genuine correlations of like-sign particles in hadronic Z0 decays

Anagnostou¹,

Bell²,

Bloodworth³

et al. 2001

Physics Letters B

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Correlations among hadrons with the same electric charge produced in Z 0 decays are studied using the high statistics data collected from 1991 through 1995 with the OPAL detector at LEP. Normalized factorial cumulants up to fourth order are used to measure genuine particle correlations as a function of the size of phase space domains in rapidity, azimuthal angle and transverse momentum. Both all-charge and like-sign particle combinations show strong positive genuine correlations. One-dimensional cumulants initially increase rapidly with decreasing size of the phase space cells but saturate quickly. In contrast, cumulants in two-and three-dimensional domains continue to increase. The strong rise of the cumulants for all-charge multiplets is increasingly driven by that of likesign multiplets. This points to the likely influence of Bose-Einstein correlations. Some of the recently proposed algorithms to simulate Bose-Einstein effects, implemented in the Monte Carlo model Pythia, are found to reproduce reasonably well the measured secondand higher-order correlations between particles with the same charge as well as those in all-charge particle multiplets.To be submitted to Phys. Lett. B

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Section: Like-sign and All-charge Cumulantssupporting

confidence: 82%

Section: Introductionsupporting

confidence: 74%

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Genuine correlations of like-sign particles in hadronic Z0 decays

Anagnostou¹,

Bell²,

Bloodworth³

et al. 2001

Physics Letters B

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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: 90%

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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“…The late diffused stage is still far from normal unexpected nuclear matter and worthy of further study [18]. Several experiments have been performed to find out the two-particle and three-particle correlation effects among produced particles [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Therefore a detailed correlation study is essential to look for the exact reasons of the correlated emission of the produced particles speculated by the different theorists.…”

Section: Section-i Two and Three Particle Correlationmentioning

confidence: 99%