Study of transverse spherocity and azimuthal anisotropy in Pb–Pb collisions at 
	    
	    sNN=5.02
	    
	   TeV using a multi-phase transport model

Mallick, Neelkamal; Sahoo, R.; Tripathy, Sushanta; Velasquez, A. Ortiz

doi:10.1088/1361-6471/abeb59

Cited by 25 publications

(34 citation statements)

References 47 publications

(78 reference statements)

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“…This is a first attempt to explore the sensitiveness of the global observables in heavy-ion collisions, to the event topology and hence the underlying particle production dynamics. In our recent study [1], we found that the anisotropic flow strongly depends on transverse spherocity in heavy-ion collision systems. Thus, it would be interesting to see how the global properties, often studied in heavy-ion collisions, vary as a function of transverse spherocity.…”

Section: Introductionmentioning

confidence: 82%

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Event topology and global observables in heavy-ion collisions at the Large Hadron Collider

Prasad,

Mallick,

Behera

et al. 2021

Preprint

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Particle production and event topology are very strongly correlated in high-energy hadronic and nuclear collisions. Event topology is decided by the underlying particle production dynamics and medium effects. Transverse spherocity is an event shape observable, which has been used in pp and heavy-ion collisions to separate the events based on their geometrical shapes. It has the unique capability to distinguish between jetty and isotropic events. In this work, we have implemented transverse spherocity in Pb-Pb collisions at √ sNN = 5.02 TeV using A Multi-Phase Transport Model (AMPT). While awaiting for experimental explorations, we perform a feasibility study of dependence of transverse spherocity on some of the global observables in heavy-ion collisions at the Large Hadron Collider energies. These global observables include the Bjorken energy density ( B j ), speed of sound (c 2 s ) in the medium and the kinetic freeze-out properties for different collision centralities. The present study reveals about the usefulness of event topology dependent measurements in heavy-ion collisions in contrast to proton-proton collisions.

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Section: Introductionmentioning

confidence: 82%

“…The AMPT settings in the current work, are the same as reported in Ref. [1,12]. For the input of impact parameter values for different centralities in Pb-Pb collisions, we have used Ref.…”

Section: A a Multi-phase Transport (Ampt) Modelmentioning

confidence: 99%

Event topology and global observables in heavy-ion collisions at the Large Hadron Collider

Prasad,

Mallick,

Behera

et al. 2021

Preprint

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“…Here, a and b denote two separate particles in a pair. In this study, we have taken charged particles in |η| < 2.5 and p T > 0.5 GeV/c to be consistent with previous studies [52,53]. The 1D correlation function is given as,…”

Section: Elliptic Flowmentioning

confidence: 99%

“…ψ n is the n th harmonic event plane angle [51]. To reduce the non-flow effects, a two-particle correlation method [52,53] can be adopted to estimate the elliptic flow. The correlation function between two particles is obtained in relative pseudorapidity (∆η = η a − η b ) and relative azimuthal angle (∆φ = φ a − φ b ).…”

Section: Elliptic Flowmentioning

confidence: 99%

Effect of nuclear density profile on the global properties in O+O collisions at the Large Hadron Collider using a multi-phase transport model

Behera,

Mallick,

Tripathy

et al. 2021

Preprint

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Oxygen ( 16 O) ions are planned to be injected at the Large Hadron Collider (LHC) in its next runs and a day of physics run is anticipated for O+O collisions at √ sNN = 7 TeV. As the system size of O+O collisions is in between those produced in pp and p+Pb collisions, the study of global properties in O+O collisions may provide a deeper insight into the heavy-ion-like behavior observed in small collision systems and its similarities/differences with larger system like Pb+Pb collisions.In the present work, we report the predictions for global properties in O+O collisions at √ sNN = 7 TeV using a multi-phase transport model (AMPT). We report the mid-rapidity charged particle multiplicity, transverse mass, Bjorken energy density, pseudorapidity distributions, speed of sound, transverse momentum (pT) spectra, the kinetic freeze-out parameters and pT-differential particle ratio as a function of collision centrality. Further, we have studied the transverse momentum dependent elliptic flow of charged particles. The results are shown for Woods-Saxon and harmonic oscillator nuclear density profiles incorporated inside oxygen nucleus. With the change of the density profile with harmonic oscillator from Woods-Saxon, a modification of average charged-particle multiplicity at most central collisions is seen. Bjorken energy density show a significant increase in most central collisions for harmonic oscillator density profile while other global properties show less dependence on the density profiles considered in this work.

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“…In this work [10], we report the first implementation of transverse spherocity in heavy-ion collisions using a multi-phase transport (AMPT) model [11]. We have performed an extensive study of azimuthal anisotropy of charged particles produced in Pb-Pb collisions at √ s NN = 5.02 TeV as a function of transverse spherocity (S 0 ).…”

Section: Introductionmentioning

confidence: 99%

Transverse spherocity dependence of azimuthal anisotropy in heavy-ion collisions at the LHC using a multi-phase transport model

Mallick¹,

Sahoo²,

Tripathy³

et al. 2021

Proceedings of the Ninth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2021)

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One of the event shape observables, the transverse spherocity (S 0 ), has been studied successfully in small collision systems such as proton-proton collisions at the LHC as a tool to separate jetty and isotropic events. It has a unique capability to distinguish events based on their geometrical shapes. In our work, we report the first implementation of transverse spherocity in heavyion collisions using a multi-phase transport model (AMPT). We have performed an extensive study of azimuthal anisotropy of charged particles produced in heavy-ion collisions as a function of transverse spherocity (S 0 ). We have followed the two-particle correlation (2PC) method to estimate the elliptic flow (v 2 ) in different centrality classes in Pb-Pb collisions at √ s NN = 5.02 TeV for high-S 0 , S 0 -integrated and low-S 0 events. We found that transverse spherocity successfully differentiates heavy-ion collisions' event topology based on their geometrical shapes, i.e., high and low values of spherocity. The high-S 0 events have nearly zero elliptic flow, while the low-S 0 events contribute significantly to the elliptic flow of spherocity-integrated events.

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Study of transverse spherocity and azimuthal anisotropy in Pb–Pb collisions at sNN=5.02 TeV using a multi-phase transport model

Cited by 25 publications

References 47 publications

Event topology and global observables in heavy-ion collisions at the Large Hadron Collider

Event topology and global observables in heavy-ion collisions at the Large Hadron Collider

Effect of nuclear density profile on the global properties in O+O collisions at the Large Hadron Collider using a multi-phase transport model

Transverse spherocity dependence of azimuthal anisotropy in heavy-ion collisions at the LHC using a multi-phase transport model

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