Rapidity spacings and intermittency analyses by differenciating charge-sign in 200 GeV/amu S + Pb interaction from CERN EMU05 experiments

Yokomi, H.; Takahashi, Yoshiyuki; Chan, C.H.; Dong, B. L.; Duthie, J. G.; Gregory, J. C.; Hayashi, T.; Christl, M. J.; Derrickson, J. H.; Eby, P. B.; Fountain, W. F.; Parnell, T. A.; Roberts, F. E.; Nagamiya, S.; Dake, S.; Tominaga, T.; Miyamura, O.; Fuki, M.; Iyono, A.; Ogata, T.

doi:10.1016/0375-9474(91)90346-8

Cited by 3 publications

(29 citation statements)

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“…The present analysis is based on the interactions of the 16 O beam and 32 S beam with energies of 60 and 200 AGeV, respectively, with AgBr being the target present in nuclear emulsion. The data of 16 O-AgBr interactions at 60 AGeV and 32 S-AgBr interactions at 200 AGeV were obtained by exposing the stacks of ILFORD G5 emulsion plates to a beam of 16 O nucleus of energy 60 AGeV and 32 S nucleus of energy 200 AGeV using the SPS accelerator at CERN [21]. A Leitz Metalloplan microscope with a 10 × objective and 10 × ocular lens provided with a semi-automatic scanning stage was used to scan the emulsion plates.…”

Section: Methodsmentioning

confidence: 99%

“…According to the selection procedure discussed above we have chosen 250 events of 16 O-AgBr interactions at 60 AGeV [23] and 140 events of 32 S-AgBr interactions at 200 AGeV [24]. The present analysis is confined to the shower tracks only.…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, it has been found that in general these correlations become weaker as the average multiplicity of the interaction increases. Yokomi et al [16] studied dynamical fluctuations of pions in pseudo-rapidity space by using CERN EMU05 experimental data in S + Pb collision at 200 GeV/amu for very high multiplicity events. No clear evidence for the intermittent phenomena has been observed for all positively and negatively charged particles, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The goal of this study is to investigate the existence of the genuine pion-pion correlation in 16 O-AgBr interactions at 60 AGeV and 32 S-AgBr interactions at 200 AGeV (SPS data) by the method of the normalized factorial cumulant moment in pseudo-rapidity (η), azimuthal angle (φ) and in two-dimensional anisotropic (η − φ) phase space. The experimental data have been fitted with a theoretical function of the form K 2 = aM b .…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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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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