Void probability scaling in ultra-relativistic heavy ion interactions

Ghosh, Dipak; Deb, Argha; Ghosh, Jayita; Chattopadhyay, Rik; Jafri, Abdul Kayum; Rahman, Azizar; Roy, Sharmila

doi:10.1016/s0927-6505(00)00156-0

Cited by 9 publications

(10 citation statements)

References 15 publications

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“…When N ξ is large, the void scaling behaviour is a strong test of hierarchical clustering to high orders. A similar scaling behaviour has been found for gaps in the rapidity distribution resulting from proton-antiproton, proton-nucleus, and relativistic heavy ion collisions (Hegyi 1992;Malik 1996;Ghosh et al 2001).…”

Section: Generating Functionssupporting

confidence: 74%

Void statistics and hierarchical scaling in the halo model

Fry¹,

Colombi²

2013

Monthly Notices of the Royal Astronomical Society

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We study scaling behaviour of statistics of voids in the context of the halo model of nonlinear large-scale structure. The halo model allows us to understand why the observed galaxy void probability obeys hierarchal scaling, even though the premise from which the scaling is derived is not satisfied. We argue that the commonly observed negative binomial scaling is not fundamental, but merely the result of the specific values of bias and number density for typical galaxies. The model implies quantitative relations between void statistics measured for two populations of galaxies, such as SDSS red and blue galaxies, and their number density and bias.

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Section: Generating Functionssupporting

confidence: 74%

Void statistics and hierarchical scaling in the halo model

Fry¹,

Colombi²

2013

Monthly Notices of the Royal Astronomical Society

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“…We have calculated the values of average clan multiplicity (N) in an interval η and the average number of particles per clan (n c ) using relations (10) and (11). The values of average clan multiplicity and the average number of particles per clan has been given in table 2 for 22 Ne projectiles, in table 3 for 28 Si projectiles, in table 4 for 16 O projectiles and in table 5 for 32 S projectiles respectively. The variation of N and n c with η has been shown in figures 2(a)-(d) and in figures 3(a)-(d), respectively, for all of the interactions.…”

Section: Resultsmentioning

confidence: 99%

“…It should be mentioned here that in all of the previous reports [15,[18][19][20][21][22] of void probability scaling, experimental points lie in between the two lines representing the minimal model and the NBD model. So it may be commented that in 22 Ne, 28 Si, 16 O and 32 S projectiles with AgBr and CNO targets at Dubna energy. all of the previous reports [15,[18][19][20][21][22] the mechanism of particle production is partly chaotic and partly coherent.…”

Section: Resultsmentioning

confidence: 99%

“…Let us compare our experimental results with the results obtained from the analysis of the higher energy data. Studies of rap-gap probability scaling have been performed earlier in 16 O-AgBr interactions at 60 AGeV [31] and in 32 S-AgBr interactions at 200 AGeV (SPS data) [32]. In both of the analyses the rap-gap probability P 0 ( η) was calculated for the pseudo-rapidity ) against pseudo-rapidity interval η on interactions of 22 Ne, 28 Si, 16 O and 32 S projectiles with AgBr and CNO targets at Dubna energy.…”

Section: Resultsmentioning

confidence: 99%

“…Figure2. The variation of average clan multiplicity N against pseudo-rapidity interval η on interactions of22 Ne,28 Si,16 O and32 S projectiles with AgBr and CNO targets at Dubna energy.…”

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confidence: 99%

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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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