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Prasad S, Mallick N, Behera D, Sahoo R, Tripathy S. Event topology and global observables in heavy-ion collisions at the Large Hadron Collider. Sci Rep 2022; 12:3917. [PMID: 35273195 PMCID: PMC8913752 DOI: 10.1038/s41598-022-07547-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 02/15/2022] [Indexed: 11/09/2022] Open
Abstract
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 [Formula: see text] = 5.02 TeV using A Multi-Phase Transport Model (AMPT). While awaiting for experimental explorations, we perform a feasibility study of transverse spherocity dependence of some of the global observables in heavy-ion collisions at the Large Hadron Collider energies. These global observables include the Bjorken energy density ([Formula: see text]), squared speed of sound ([Formula: see text]) 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.
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Affiliation(s)
- Suraj Prasad
- Department of Physics, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Neelkamal Mallick
- Department of Physics, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Debadatta Behera
- Department of Physics, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Raghunath Sahoo
- Department of Physics, Indian Institute of Technology Indore, Simrol, Indore, 453552, India. .,CERN, CH 1211, Geneva 23, Switzerland.
| | - Sushanta Tripathy
- INFN - sezione di Bologna, via Irnerio 46, 40126, Bologna, BO, Italy
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Mitrankova M, Berdnikov A, Berdnikov Y, Kotov D, Mitrankov I. The ϕ meson production in small collision systems observed by PHENIX. EPJ WEB OF CONFERENCES 2022. [DOI: 10.1051/epjconf/202225805010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The measurements of light hadron production in small collision systems (such as p+Al, p+Au, d+Au, 3He+Au) may allow to explore the quarkgluon plasma formation and to determine the main hadronization mechanism in the considered collisions. Such research has become particularly crucial with the observation of the light hadrons collective behavior in p/d/3He+Au collisions at √SNN = 200 GeV and in p+Al collisions at the same energy at forward and backward rapidities. Among the large variety of light hadrons, ϕ meson is of particular interest since its production is sensitive to the presence of the quark-gluon plasma. The paper presents the comparison of the obtained experimental results on ϕ meson production to different light hadron production in p+Al and 3He+Au at √SNN = 200 GeV at midrapidity. The comparisons of ϕ meson production in p+Al, p+Au, d+Au, and 3He+Au collisions at √SNN = 200 GeV at midrapidity to theoretical models predictions (PYTHIA model and default and string melting versions of the AMPT model) are also provided. The results suggest that the QGP can be formed in p/d/3He+Au collisions, but the volume and lifetime of the produced medium might be insufficient for observation of strangeness enhancement effect. Conceivably, the main hadronization mechanism of ϕ meson production in p+Al collisions is fragmentation, while in p/d/3He+Au collisions this process occurs via coalescence.
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Cao S, Wang XN. Jet quenching and medium response in high-energy heavy-ion collisions: a review. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2021; 84:024301. [PMID: 33470220 DOI: 10.1088/1361-6633/abc22b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Jet quenching has been used successfully as a hard probe to study properties of the quark-gluon plasma (QGP) in high-energy heavy-ion collisions at both the relativistic heavy-ion collider and the large hadron collider. We will review recent progresses in theoretical and phenomenological studies of jet quenching with jet transport models. Special emphasis is given to effects of jet-induced medium response on a wide variety of experimental observables and their implications on extracting transport properties of the QGP in heavy-ion collisions.
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Affiliation(s)
- Shanshan Cao
- Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, Shandong 266237, People's Republic of China
- Department of Physics and Astronomy, Wayne State University, Detroit, MI 48201, United States of America
| | - Xin-Nian Wang
- Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, People's Republic of China
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
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Li H, Xu HJ, Zhou Y, Wang X, Zhao J, Chen LW, Wang F. Probing the Neutron Skin with Ultrarelativistic Isobaric Collisions. PHYSICAL REVIEW LETTERS 2020; 125:222301. [PMID: 33315427 DOI: 10.1103/physrevlett.125.222301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 10/15/2020] [Indexed: 06/12/2023]
Abstract
Particle production in ultrarelativistic heavy ion collisions depends on the details of the nucleon density distributions in the colliding nuclei. We demonstrate that the charged hadron multiplicity distributions in isobaric collisions at ultrarelativistic energies provide a novel approach to determine the poorly known neutron density distributions and thus the neutron skin thickness in finite nuclei, which can in turn put stringent constraints on the nuclear symmetry energy.
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Affiliation(s)
- Hanlin Li
- College of Science, Wuhan University of Science and Technology, Wuhan, Hubei 430065, China
| | - Hao-Jie Xu
- School of Science, Huzhou University, Huzhou, Zhejiang 313000, China
| | - Ying Zhou
- School of Physics and Astronomy and Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaobao Wang
- School of Science, Huzhou University, Huzhou, Zhejiang 313000, China
| | - Jie Zhao
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - Lie-Wen Chen
- School of Physics and Astronomy and Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fuqiang Wang
- School of Science, Huzhou University, Huzhou, Zhejiang 313000, China
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
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Investigation of the Elliptic Flow Fluctuations of the Identified Particles Using the a Multi-Phase Transport Model. UNIVERSE 2020. [DOI: 10.3390/universe6090146] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A Multi-Phase Transport (AMPT) model is used to study the elliptic flow fluctuations of identified particles using participant and spectator event planes. The elliptic flow measured using the first order spectator event plane is expected to give the elliptic flow relative to the true reaction plane which suppresses the flow fluctuations. However, the elliptic flow measured using the second-order participant plane is expected to capture the elliptic flow fluctuations. Our study shows that the first order spectator event plane could be used to study the elliptic flow fluctuations of the identified particles in the AMPT model. The elliptic flow fluctuations magnitude shows weak particle species dependence and transverse momentum dependence. Such observation will have important implications for understanding the source of the elliptic flow fluctuations.
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Ko CM. Resonances from AMPT. EPJ WEB OF CONFERENCES 2012. [DOI: 10.1051/epjconf/20123600014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhang B. Recent results from parton-cascade/microscopic transport. THE EUROPEAN PHYSICAL JOURNAL C 2009; 62:25-29. [DOI: 10.1140/epjc/s10052-009-0903-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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ZHANG BIN. J/ψ PRODUCTION FROM CHARM COALESCENCE IN RELATIVISTIC HEAVY ION COLLISIONS. INTERNATIONAL JOURNAL OF MODERN PHYSICS E 2007; 16:2061-2065. [DOI: 10.1142/s0218301307007465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
J/ψ production is closely related to the production of the strongly interacting Quark-Gluon Plasma (sQGP) in relativistic heavy ion collisions. To study the effects of charm quark dynamics on J/ψ production, the phase space distributions of charm and anti-charm quarks are generated using A Multi-Phase Transport (AMPT) model. These charm quarks then coalesce into J/ψ particles. The production and flow of J/ψ show strong sensitivity to final state charm interactions. The results are compared to charm quark and D meson results from the AMPT model and recent predictions from other models.
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Affiliation(s)
- BIN ZHANG
- Department of Chemistry and Physics, Arkansas State University, P.O. Box 419, State University, Arkansas, U.S.A
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Zhang B. J/ψ production from charm coalescence in relativistic heavy ion collisions. PHYSICS LETTERS B 2007; 647:249-252. [DOI: 10.1016/j.physletb.2007.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Zhang B. and charm transport at RHIC. NUCLEAR PHYSICS A 2007; 785:249-252. [DOI: 10.1016/j.nuclphysa.2006.11.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Lin ZW, Ko CM, Pal S. Partonic effects on pion interferometry at the relativistic heavy-ion collider. PHYSICAL REVIEW LETTERS 2002; 89:152301. [PMID: 12365982 DOI: 10.1103/physrevlett.89.152301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2002] [Indexed: 05/23/2023]
Abstract
Using a multiphase transport model that includes both initial partonic and final hadronic interactions, we study the pion interferometry at the Relativistic Heavy-Ion Collider. We find that the two-pion correlation function is sensitive to the magnitude of the parton-scattering cross section, which controls the parton density at which the transition from the partonic to hadronic matter occurs. Also, the emission source of pions is non-Gaussian, leading to source radii that can be more than twice larger than the radius parameters extracted from a Gaussian fit to the correlation function.
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Affiliation(s)
- Zi-Wei Lin
- Cyclotron Institute and Physics Department, Texas A&M University, College Station 77843-3366, USA
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Back BB, Baker MD, Barton DS, Betts RR, Bindel R, Budzanowski A, Busza W, Carroll A, Decowski MP, Garcia E, George N, Gulbrandsen K, Gushue S, Halliwell C, Heintzelman GA, Henderson C, Hofman DJ, Hołyński R, Holzman B, Johnson E, Kane JL, Katzy J, Khan N, Kucewicz W, Kulinich P, Lin WT, Manly S, McLeod D, Michałowski J, Mignerey AC, Mülmenstädt J, Nouicer R, Olszewski A, Pak R, Park IC, Pernegger H, Reed C, Remsberg LP, Reuter M, Roland C, Roland G, Rosenberg L, Sarin P, Sawicki P, Skulski W, Steadman SG, Steinberg P, Stephans GS, Stodulski M, Sukhanov A, Tang JL, Teng R, Trzupek A, Vale C, van Nieuwenhuizen GJ, Verdier R, Wadsworth B, Wolfs FL, Wosiek B, Woźniak K, Wuosmaa AH, Wysłouch B. Charged-particle pseudorapidity density distributions from Au+Au collisions at sqrt[s(NN)]=130 GeV. PHYSICAL REVIEW LETTERS 2001; 87:102303. [PMID: 11531476 DOI: 10.1103/physrevlett.87.102303] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2001] [Indexed: 05/23/2023]
Abstract
The charged-particle pseudorapidity density dN(ch)/d eta has been measured for Au+Au collisions at sqrt[s(NN)] = 130 GeV at RHIC, using the PHOBOS apparatus. The total number of charged particles produced for the 3% most-central Au+Au collisions for /eta/<or=5.4 is found to be 4200+/-470. The evolution of dN(ch)/d eta with centrality is discussed, and compared to model calculations and to data from proton-induced collisions. The data show an enhancement in charged-particle production at midrapidity, while in the fragmentation regions, the results are consistent with expectations from pp and pA scattering.
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Affiliation(s)
- B B Back
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843, USA
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Li BA. Neutron-proton differential flow as a probe of isospin-dependence of the nuclear equation of state. PHYSICAL REVIEW LETTERS 2000; 85:4221-4224. [PMID: 11060603 DOI: 10.1103/physrevlett.85.4221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2000] [Indexed: 05/23/2023]
Abstract
The neutron-proton differential flow is shown to be a very useful probe of the isospin-dependence of the nuclear equation of state (EOS). This novel approach utilizes constructively both the isospin fractionation and the nuclear collective flow as well as their sensitivities to the isospin-dependence of the nuclear EOS. It also avoids effectively uncertainties associated with other dynamical ingredients of heavy-ion reactions at intermediate energies.
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Affiliation(s)
- BA Li
- Department of Chemistry and Physics, Arkansas State University, P.O. Box 419, State University, Arkansas 72467-0419, USA
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Li BA, Ko CM. Kaon dispersion relation and flow in relativistic heavy-ion collisions. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 54:3283-3285. [PMID: 9971706 DOI: 10.1103/physrevc.54.3283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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16
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Li BA, Ko CM, Li GQ. pt dependence of transverse flow in relativistic heavy-ion collisions. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 54:844-847. [PMID: 9971410 DOI: 10.1103/physrevc.54.844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Li BA, Ko CM. Pion flow and antiflow in relativistic heavy-ion collisions. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 53:R22-R24. [PMID: 9970975 DOI: 10.1103/physrevc.53.r22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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