Factorial moments, cumulants and correlation integrals in ?+ p andK + p interactions at 250 GeV/c

Agababyan, N. M.; Böttcher, H.; Botterweck, F.; Chalet, M.; Chliapnikov, P.; Wolf, E. A. De; Dziunikowska, K.; Endler, A. M. F.; Hakobyan, R.; Kisielewska, D.; Kittel, W.; Olkiewicz, K.; Rizatdinova, F.; Shabalina, E.; Smirnova, L. N.; Tchikilev, O.; Tomaradze, A.; Verbeure, F.

doi:10.1007/bf01498621

Cited by 41 publications

(9 citation statements)

References 42 publications

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“…They have established the existence of strong genuine multihadron correlations up to the fifth order. In proton-proton collisions, correlations among more than three particles have been observed [10][11][12][13][14]. In contrast to this situation, in heavy-ion collisions at low energies and/or in reactions of light nuclei, genuine correlations are found to have non-zero value only up to third order [15].…”

Section: Introductionmentioning

confidence: 99%

Genuine pion–pion correlations in heavy-ion collisions

Ghosh

Deb

Bhattacharyya

et al. 2012

J. Phys. G: Nucl. Part. Phys.

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The search for genuine two-particle dynamical correlations among the pions produced in 16 O-AgBr interactions at 60 AGeV and 32 S-AgBr interactions at 200 AGeV (super proton synchrotron data) has been carried out by the method of normalized factorial cumulant moments in pseudo-rapidity (η), azimuthal angle (φ) and two-dimensional anisotropic (η-φ) phase space. The analysis reveals the presence of genuine two-particle dynamical correlations among the pions in 16 O-AgBr and 32 S-AgBr interactions in both one and two dimensions. Stronger correlation has been observed in higher dimensional space. Correlations between the pions are found to decrease with the increase of projectile mass and energy. Experimental results have been compared with the FRITIOF data sample in the pseudo-rapidity space. In azimuthal angle space, events simulated by generating random numbers (Monte Carlo Simulation) have been used for the purpose of comparison. The FRITIOF data and the data of the simulated interactions have failed to reproduce the experimental results. The experimental results have also been compared with the event sample generated by the UrQMD model in both pseudo-rapidity and azimuthal angle space. Like the FRITIOF model, the UrQMD model is also unable to replicate the experimental results. The variation of normalized cumulant moment (K 2 ) against the number of bin M has been fitted with a function K 2 = aM b in both one and two dimensions. No fitting of this kind has been possible in the case of the FRITIOF data, UrQMD data and the MC simulated data. * This work is financially supported by University Grants Commision, Govt. of India (Sanction No PSW-044/11-12).

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Section: Introductionmentioning

confidence: 99%

Genuine pion–pion correlations in heavy-ion collisions

Ghosh

Deb

Bhattacharyya

et al. 2012

J. Phys. G: Nucl. Part. Phys.

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“…In hadronic interactions [2], both in one [22] and several dimensions [36], the factorial moments were found to be basically composed of two-particle correlations. Our study shows sensitive contributions of correlations of orders q = 3 and even 4 to the dynamical fluctuations in e + e − annihilation.…”

Section: Factorial Moments and Cumulants In Hadronic Collisonsmentioning

confidence: 99%

“…The factorial moments have also been investigated in y×Φ×p T phase space and in its projections in hadronhadron collisons by NA22 [36].…”

Section: Factorial Moments and Cumulants In Hadronic Collisonsmentioning

confidence: 99%

Intermittency and correlations in hadronic Z $^0$ decays

Abbiendi¹,

Ackerstaff²,

Alexander³

et al. 1999

Eur. Phys. J. C

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Abstract.A multidimensional study of local multiplicity fluctuations and multiparticle correlations of hadrons produced in Z 0 decays is performed. The study is based on the data sample of more than 4×106 events recorded with the OPAL detector at LEP. The fluctuations and correlations are analysed in terms of the normalized scaled factorial moments and cumulants up to the fifth order. The moments are observed to have intermittency-like behaviour, which is found to be more pronounced with increasing dimension. The large data sample allows for the first time a study of the factorial cumulants in e + e − annihilation. The analysis of the cumulants shows the existence of genuine multiparticle correlations with a strong intermittency rise up to higher orders. These correlations are found to be stronger in higher dimensions. The decomposition of the factorial moments into lower-order correlations shows that the dynamical fluctuations have important contributions from genuine many-particle correlations. The Monte Carlo models Jetset 7.4 and Herwig 5.9 are found to reproduce the trend of the measured moments and cumulants but they underestimate the magnitudes. The results are found to be consistent with QCD jet formation dynamics, although additional contributions from other mechanisms cannot be excluded. 240The OPAL Collaboration: Intermittency and correlations in hadronic Z 0 decays

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Section: Oe…'ˆ ‡-ˆÿˆ……Oe…›…unclassified