Long-range correlations in nucleus-nucleus interactions at ultrahigh energies

Singh, G.; Sengupta, Kaushik; Ismail, Atef; Jain, Priyanka

doi:10.1103/physrevc.39.1835

Cited by 14 publications

(23 citation statements)

References 12 publications

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“…Apart from the various properties of the particle produced in relativistic heavy-ion interactions, the possible correlations among the charged particles produced in different ηvalues are considered as much needy techniques to investigate the underlying dynamics of the multiparticle production in nucleus-nucleus collisions [28,29]. There are two types of correlations observed, namely the short-and long-range correlations in relativistic heavy-ion interactions, at RHIC and SPS energies [26,[30][31][32]. From the last few years, many researchers have developed several methods to study the correlations and fluctuations among the produced particles in high-energy heavy-ion interactions [33,34].…”

Section: Introductionmentioning

confidence: 99%

Evidence of forward–backward correlation of pions in ultra-relativistic ring- and jet-like events in $$^{16}O-Ag/Br$$ interactions at $$E_{lab}=60$$ A GeV

et al. 2021

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An investigation on the presence of the forwardbackward correlations in the pions multiplicity, emitted in 16 O − Ag/Br interactions at energy E lab = 60 A GeV are carried out. The study of the forward-backward correlation between various observables which is separated by two different pseudorapidity intervals can be treated as an important probe to defining the primordial conditions for the formation of the Quark Gluon Plasma (QGP). We have observed the dependency of correlation fluctuations and correlation strength on pseudorapidity (η) and the increasing width of the pseudorapidity bin size Δη. The roughness of the multiplicities and the particle number deviations are also investigated. The nuclear photographic emulsion technique has been employed to collect the experimental data. We have performed the FRITIOF and Ultra-relativistic Quantum Molecular Dynamics (UrQMD) simulations to compare the experimental results with the simulated results. The analysis strongly indicates the presence of forward-backward correlations in the experimental distributions of pions beyond statistical noise. We have also analyzed the ring-and jet-like structure to confirm the presence of the forward-backward correlations in the multiplicities of 16 O − Ag/Br interactions at 60 A GeV. We have also taken the variations of correlation fluctuations and correlation strength in η and Δη space, respectively for the ring-like and jet-like structure. The average behavior of correlation parameters of ring-like events strongly differs from jet-like events due to expected Cherenkov Gluon radiation.

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Section: Introductionmentioning

confidence: 99%

Evidence of forward–backward correlation of pions in ultra-relativistic ring- and jet-like events in $$^{16}O-Ag/Br$$ interactions at $$E_{lab}=60$$ A GeV

et al. 2021

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“…The SRC are envisaged to be confined to a region of ±1η units around η c [14,15,16,34]. In order to minimize the contributions from SRC, a gap of ∆η from the center of symmetry is introduced It has been reported [15,34] [9,15]. It may also be noted from the figure that although AMPT predicts the similar trends of variations of b with η w for both the data sets yet it is evidently clear that AMPT predicted values are somewhat smaller as compared to those observed for the experimental data in the entire range of η w considered.…”

Section: Resultsmentioning

confidence: 99%

“…Correlations among the relativistic charged particles produced in different pseudorapidity,η bins are considered as a powerful tool for understanding the underlying mechanism of multiparticle production in hadron-hadron(hh), hadron-nucleus(hA) and nucleus-nucleus(A-A) collisions [4,5,6]. Both short-and long-range correlations have been observed in hadronic and heavy-ion collisions at SPS and RHIC energies [5,6,7,8,9,10]. These observed correlations have been interpreted in terms of the concept of clustering [11], that is, the particle production takes place via the formation of some intermediate states, referred to as 'clusters' which finally decay isotropically in their centre-of-mass(c.m.)…”

Section: Introductionmentioning

confidence: 99%

“…It is, however, essential to identify some baseline contributions to the experimentally observed correlations which do not depend on new physics, for example, formation of some exotic states like DCC or QGP. It is, therefore, considered worthwhile to carry out a systematic study of F-B correlations at lower energies, BNL, and SPS because of the fact that only a few attempts have been made to study F-B correlations at these energies [9,14,15,16,36].…”

Section: Introductionmentioning

confidence: 99%

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Search for Long-Range Correlations in Relativistic Heavy-Ion Collisions at SPS Energies

Ahmad

Khatun

Khan

et al. 2015

Advances in High Energy Physics

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Long range correlations are searched for by analyzing the experimental data on 16 O-AgBr and 32 S-AgBr collisions at 200A GeV/c and the results are compared with the predictions of a multi phase transport(AMPT) model. The findings reveal that the observed forward-backward (F-B) multiplicity correlations are mainly of short-range in nature. The range of F-B correlations are observed to extend with increasing projectile mass. The observed extended range of F-B correlations might be due to overall multiplicity fluctuations arising because of nuclear geometry. The findings are not sufficient for making any definite conclusions regarding the presence of long-range correlations. PACS numbers: 25.75-q, 25.75.Gz KEY-WORDS: Long-range correlations, Multiparticle production, Relativistic heavy-ion collisions.

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“…In [12], it is pointed out that the observed long-range correlations in nucleus-nucleus collisions at high energy are due to the formation of clusters by the interactions of quark-quark or quark-diquark pairs. Recently, Caruthers and Shih [13] have developed a model independent technique by using the concept of mutual informa- IsTl,abl Fig.…”

Section: The Relative Information Imentioning

confidence: 99%

Characteristics of He-nucleus interactions at relativistic energy

Golde

Singh

Jain

et al. 1992

Z. Physik A - Hadrons and Nuclei

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From the peripheral collisions of 28Si projectile at 14.5A GeV in nuclear emulsion, emerged 4He nuclei among the projectile fragments, are followed for their interactions. Multiplicity and pseudorapidity distributions of the produced particles emanating from 366 inelastic 4He induced emulsion reactions are compared with those of 28Si at 14.5A GeV, 4He at 140A GeV and proton at 800 GeV beams. Standard deviation of the Gaussian fittings to the pseudorapidity distributions for different values of average shower particle multiplicities represents an approximate measure of the impact parameter. Second moments of the multiplicity distributions of the shower tracks can be parameterized in terms of a universal polynomial dependence. Results agree quite well with the predictions of the multistring model VENUS. PACS: 25.70.Np; 12.38.Mh 292 3. Discussion of results

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Long-range correlations in nucleus-nucleus interactions at ultrahigh energies

Cited by 14 publications

References 12 publications

Evidence of forward–backward correlation of pions in ultra-relativistic ring- and jet-like events in $$^{16}O-Ag/Br$$ interactions at $$E_{lab}=60$$ A GeV

Evidence of forward–backward correlation of pions in ultra-relativistic ring- and jet-like events in $$^{16}O-Ag/Br$$ interactions at $$E_{lab}=60$$ A GeV

Search for Long-Range Correlations in Relativistic Heavy-Ion Collisions at SPS Energies

Characteristics of He-nucleus interactions at relativistic energy

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