Event Shape and Multiplicity Dependence of Freeze-Out Scenario and System Thermodynamics in Proton+Proton Collisions at s=13 TeV Using PYTHIA8
Recent observations of QGP-like conditions in high-multiplicity pp collisions from ALICE experiment at the LHC warrant an introspection whether to use pp collisions as a baseline measurement to characterize heavy-ion collisions for the possible formation of a Quark-Gluon Plasma. A double differentia...
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Wiley
2021-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2021/8822524 |
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| author | Sushanta Tripathy Ashish Bisht Raghunath Sahoo Arvind Khuntia Malavika Panikkassery Salvan |
| author_facet | Sushanta Tripathy Ashish Bisht Raghunath Sahoo Arvind Khuntia Malavika Panikkassery Salvan |
| author_sort | Sushanta Tripathy |
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| description | Recent observations of QGP-like conditions in high-multiplicity pp collisions from ALICE experiment at the LHC warrant an introspection whether to use pp collisions as a baseline measurement to characterize heavy-ion collisions for the possible formation of a Quark-Gluon Plasma. A double differential study of the particle spectra and thermodynamics of the produced system as a function of charged-particle multiplicity and transverse spherocity in pp collisions would shed light on the underlying event dynamics. Transverse spherocity, one of the event shape observables, allows to separate the events in terms of jetty and isotropic events. We analyse the identified particle transverse momentum (pT) spectra as a function of charged-particle multiplicity and transverse spherocity using Tsallis nonextensive statistics and Boltzmann-Gibbs Blast-Wave (BGBW) model in pp collisions at s=13 TeV using PYTHIA8 event generator. The extracted parameters such as temperature (T), radial flow (β), and nonextensive parameter (q) are shown as a function of charged-particle multiplicity for different spherocity classes. We observe that the isotropic events approach thermal equilibrium while the jetty ones remain far from equilibrium. We argue that, while studying the QGP-like conditions in small systems, one should separate the isotropic events from the spherocity-integrated events, as the production dynamics are different. |
| format | Article |
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| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
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| series | Advances in High Energy Physics |
| spelling | doaj-art-1bd2b34a61e74b42bdb46d7dbf0a00c12025-08-20T02:01:51ZengWileyAdvances in High Energy Physics1687-73571687-73652021-01-01202110.1155/2021/88225248822524Event Shape and Multiplicity Dependence of Freeze-Out Scenario and System Thermodynamics in Proton+Proton Collisions at s=13 TeV Using PYTHIA8Sushanta Tripathy0Ashish Bisht1Raghunath Sahoo2Arvind Khuntia3Malavika Panikkassery Salvan4Department of Physics, Indian Institute of Technology Indore, Simrol, Indore 453552, IndiaDepartment of Physics, Indian Institute of Technology Indore, Simrol, Indore 453552, IndiaDepartment of Physics, Indian Institute of Technology Indore, Simrol, Indore 453552, IndiaInstitute of Nuclear Physics, Polish Academy of Science (PAS), IFJ PAN, Krakow, PolandNational Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamil Nadu, IndiaRecent observations of QGP-like conditions in high-multiplicity pp collisions from ALICE experiment at the LHC warrant an introspection whether to use pp collisions as a baseline measurement to characterize heavy-ion collisions for the possible formation of a Quark-Gluon Plasma. A double differential study of the particle spectra and thermodynamics of the produced system as a function of charged-particle multiplicity and transverse spherocity in pp collisions would shed light on the underlying event dynamics. Transverse spherocity, one of the event shape observables, allows to separate the events in terms of jetty and isotropic events. We analyse the identified particle transverse momentum (pT) spectra as a function of charged-particle multiplicity and transverse spherocity using Tsallis nonextensive statistics and Boltzmann-Gibbs Blast-Wave (BGBW) model in pp collisions at s=13 TeV using PYTHIA8 event generator. The extracted parameters such as temperature (T), radial flow (β), and nonextensive parameter (q) are shown as a function of charged-particle multiplicity for different spherocity classes. We observe that the isotropic events approach thermal equilibrium while the jetty ones remain far from equilibrium. We argue that, while studying the QGP-like conditions in small systems, one should separate the isotropic events from the spherocity-integrated events, as the production dynamics are different.http://dx.doi.org/10.1155/2021/8822524 |
| spellingShingle | Sushanta Tripathy Ashish Bisht Raghunath Sahoo Arvind Khuntia Malavika Panikkassery Salvan Event Shape and Multiplicity Dependence of Freeze-Out Scenario and System Thermodynamics in Proton+Proton Collisions at s=13 TeV Using PYTHIA8 Advances in High Energy Physics |
| title | Event Shape and Multiplicity Dependence of Freeze-Out Scenario and System Thermodynamics in Proton+Proton Collisions at s=13 TeV Using PYTHIA8 |
| title_full | Event Shape and Multiplicity Dependence of Freeze-Out Scenario and System Thermodynamics in Proton+Proton Collisions at s=13 TeV Using PYTHIA8 |
| title_fullStr | Event Shape and Multiplicity Dependence of Freeze-Out Scenario and System Thermodynamics in Proton+Proton Collisions at s=13 TeV Using PYTHIA8 |
| title_full_unstemmed | Event Shape and Multiplicity Dependence of Freeze-Out Scenario and System Thermodynamics in Proton+Proton Collisions at s=13 TeV Using PYTHIA8 |
| title_short | Event Shape and Multiplicity Dependence of Freeze-Out Scenario and System Thermodynamics in Proton+Proton Collisions at s=13 TeV Using PYTHIA8 |
| title_sort | event shape and multiplicity dependence of freeze out scenario and system thermodynamics in proton proton collisions at s 13 tev using pythia8 |
| url | http://dx.doi.org/10.1155/2021/8822524 |
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