Genuine pion–pion correlations in heavy-ion collisions

Ghosh, Dipak; Deb, Argha; Bhattacharyya, Swarnapratim; Datta, Utpal

doi:10.1088/0954-3899/39/10/105101

Cited by 15 publications

(22 citation statements)

References 42 publications

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“…Hence, is expected to grow, leading to a limiting value. Thus, the saturation value of is strongly depends on projectile size, which is also reported by other experiments [7][8][9][10][11][12][13][14].…”

Section: Resultssupporting

confidence: 78%

“…According to two-source model, it is assumed that there are two types of source responsible for the multi-particle production one of them is chaotic source described by the NBD model while the second one is coherent source described by minimal model or hierarchical Poisson model [8][9][10][11]. If experimental points can be fitted by NBD model then multi-particle production mechanism is chaotic.…”

Section: Resultsmentioning

confidence: 99%

“…If experimental points can be fitted with expectations of minimal model then particle production is coherent [7,8]. However, there is also a possibility that experimental points may lie in region bounded by NBD model and minimal model then particle production mechanism is partly coherent and partly chaotic [7][8][9][10][11]21].…”

Section: Resultsmentioning

confidence: 99%

“…The clans have no mutual interactions, whereas the particles emitted due to disintegration of a clan have strong correlations. In the context of clan model, average clan multiplicity and average number of particles per clan are of immense physical importance and are referred as clan model parameters [7][8][9][10][11]. The clan model parameter can be calculated by rapidity gap (rap-gap) probability scaling, which is also known as void probability scaling [12].…”

Section: Introductionmentioning

confidence: 99%

“…The rap-gap probability is defined as the probability of events with zero particles in a specific region of phase space [12][13][14]. In earlier research it was reported that rap-gap probability P 0 (∆η) is a useful parameter to study correlations among secondary particles produced in certain interactions [7][8][9][10][11]. In this paper, we have computed clan model parameters and studied their target dependence in light of void probability scaling in nuclear emulsion using 84 Kr 36 at ~ 1 A GeV as projectile.…”

Section: Introductionmentioning

confidence: 99%

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Target dependence of clan model parameter in 84 Kr 36 – Emulsion interactions at 1 GeV per nucleon

et al. 2014

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Abstract. The article focuses on study of clan model parameters and their target dependence in light of void probability scaling for heavy (Ag and Br) and light (C, N and O) groups of targets present in nuclear emulsion detector using 84 Kr 36 at ~1 A GeV. The variation of scaled rapiditygap (rap-gap) probability with single moment combination has been studied. We found that experimental points are lying approximately on the negative binomial distribution (NBD) curve, indicating a scaling behavior. The average clan multiplicities ( ) for interactions, increases with the pseudo-rapidity interval (∆η) was also observed. The values of for AgBr targets are larger than those for CNO target and also average number of particles per clan ( ) increases with increase in pseudo-rapidity interval. We further observed that for a particular target, average number of particles per clan ( ) increases with an increase in the size of projectile nucleus.

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Section: Resultssupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Target dependence of clan model parameter in 84 Kr 36 – Emulsion interactions at 1 GeV per nucleon

et al. 2014

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Target dependence of clan model parameters at Dubna energy-chaotic pion production

Bhattacharyya

Neagu

Firu

2013

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

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A detailed study of clan model parameters and their target dependence has been carried out in the light of void probability scaling for heavy (AgBr) and light (CNO) groups of targets present in the nuclear emulsion using 22 Ne (at an incident momentum of 4.1 GeV/c), 28 Si (at an incident momentum of 4.5 GeV/c), 16 O (at an incident momentum of 4.5 GeV/c) and 32 S (at an incident momentum of 4.5 GeV/c) projectiles. The variation of scaled rapgap probability with the single moment combination has been studied for all of the interactions. The experimental points are found to lie approximately on the NBD curve for all of the interactions, indicating a scaling behavior. According to the two-source model of particle production, in the case of 32 S-AgBr interactions at 4.5 GeV/c, the pion production mechanism has been found to be almost chaotic. On the contrary, for all of the other interactions at 4.1-4.5 GeV/c, pion production is predominantly chaotic. Average clan multiplicities (N) for all of the interactions are found to increase with the increase in the pseudo-rapidity interval η. The values of N for the AgBr target are larger than those for the CNO target. The average number of particles per clan (n c ) increases initially with the increase in pseudo-rapidity interval. An approximate saturation of the values of n c is observed for 22 Ne and 16 O projectiles around η = 6. With the increase in projectile size, the saturation of n c seems to be wiped out. It can also be observed from the tables that for a particular target the average number of particles per clan (n c ) increases with the increase in the size of the projectile nucleus. A comparison with the results of the SPS data has also been presented.

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Forward–backward multiplicity correlation in high-energy nucleus–nucleus interactions at a few AGeV/c

Bhattacharyya¹,

Neagu²,

Firu³

2014

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

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We have presented a systematic study of two-particle rapidity correlations in terms of investigating the dynamical fluctuation observable σ 2 c in the forwardbackward pseudo-rapidity windows by analyzing the experimental data of 16 O-AgBr interactions at 4.5 AGeV/c, 22 Ne-AgBr interactions at 4.1 AGeV/c, 28 Si-AgBr and 32 S-AgBr interactions at 4.5 AGeV/c. The experimental results have been compared with the results obtained from the analysis of event sample simulated (MC-RAND) by generating random numbers and also with the analysis of events generated by the UrQMD and AMPT model. Our study confirms the presence of strong short-range correlations among the produced particles in the forward and the backward pseudo-rapidity region. The analysis of the simple Monte Carlo-simulated (MC-RAND) events signifies that the observed correlations are not due to mere statistics only; explanation of such correlations can be attributed to the presence of dynamical fluctuations during the production of charged pions. Comparisons of the experimental results with the results obtained from analyzing the UrQMD data sample indicate that the UrQMD model cannot reproduce the experimental findings. The AMPT model also cannot explain the experimental results satisfactorily. Comparisons of our experimental results with the results obtained from the analysis of higher energy emulsion data and with the results of the RHIC data have also been presented.

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Genuine pion–pion correlations in heavy-ion collisions

Cited by 15 publications

References 42 publications

Target dependence of clan model parameter in 84 Kr 36 – Emulsion interactions at 1 GeV per nucleon

Target dependence of clan model parameter in 84 Kr 36 – Emulsion interactions at 1 GeV per nucleon

Target dependence of clan model parameters at Dubna energy-chaotic pion production

Forward–backward multiplicity correlation in high-energy nucleus–nucleus interactions at a few AGeV/c

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