Study of $$\Lambda $$ Λ polarization in relativistic nuclear collisions at $$\sqrt{s_\mathrm {NN}}=7.7$$ s NN = 7.7 –200 GeV
Abstract We present a calculation of the global polarization of $$\Lambda $$ Λ hyperons in relativistic Au–Au collisions at RHIC Beam Energy Scan range $$\sqrt{s_\mathrm {NN}}=7.7{-}200$$ s NN = 7.7 - 200 GeV with a $$3+1$$ 3 + 1 -dimensional cascade $$\,+\,$$ + viscous hydro model, UrQMD $$\,+\,$$...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-04-01
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| Series: | European Physical Journal C: Particles and Fields |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-017-4765-1 |
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| author | Iu. Karpenko F. Becattini |
| author_facet | Iu. Karpenko F. Becattini |
| author_sort | Iu. Karpenko |
| collection | DOAJ |
| description | Abstract We present a calculation of the global polarization of $$\Lambda $$ Λ hyperons in relativistic Au–Au collisions at RHIC Beam Energy Scan range $$\sqrt{s_\mathrm {NN}}=7.7{-}200$$ s NN = 7.7 - 200 GeV with a $$3+1$$ 3 + 1 -dimensional cascade $$\,+\,$$ + viscous hydro model, UrQMD $$\,+\,$$ + vHLLE. Within this model, the mean polarization of $$\Lambda $$ Λ in the out-of-plane direction is predicted to decrease rapidly with collision energy from a top value of about 2% at the lowest energy examined. We explore the connection between the polarization signal and thermal vorticity and estimate the feed-down contribution to $$\Lambda $$ Λ polarization due to the decay of higher mass hyperons. |
| first_indexed | 2024-12-11T03:33:19Z |
| format | Article |
| id | doaj.art-ff9f4b990a5b47c19eca2187ff1a48d2 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-11T03:33:19Z |
| publishDate | 2017-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-ff9f4b990a5b47c19eca2187ff1a48d22022-12-22T01:22:20ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522017-04-0177411010.1140/epjc/s10052-017-4765-1Study of $$\Lambda $$ Λ polarization in relativistic nuclear collisions at $$\sqrt{s_\mathrm {NN}}=7.7$$ s NN = 7.7 –200 GeVIu. Karpenko0F. Becattini1INFN-Sezione di FirenzeINFN-Sezione di FirenzeAbstract We present a calculation of the global polarization of $$\Lambda $$ Λ hyperons in relativistic Au–Au collisions at RHIC Beam Energy Scan range $$\sqrt{s_\mathrm {NN}}=7.7{-}200$$ s NN = 7.7 - 200 GeV with a $$3+1$$ 3 + 1 -dimensional cascade $$\,+\,$$ + viscous hydro model, UrQMD $$\,+\,$$ + vHLLE. Within this model, the mean polarization of $$\Lambda $$ Λ in the out-of-plane direction is predicted to decrease rapidly with collision energy from a top value of about 2% at the lowest energy examined. We explore the connection between the polarization signal and thermal vorticity and estimate the feed-down contribution to $$\Lambda $$ Λ polarization due to the decay of higher mass hyperons.http://link.springer.com/article/10.1140/epjc/s10052-017-4765-1Collision EnergyTotal Angular MomentumSpin VectorHydrodynamic EvolutionGlobal Polarization |
| spellingShingle | Iu. Karpenko F. Becattini Study of $$\Lambda $$ Λ polarization in relativistic nuclear collisions at $$\sqrt{s_\mathrm {NN}}=7.7$$ s NN = 7.7 –200 GeV European Physical Journal C: Particles and Fields Collision Energy Total Angular Momentum Spin Vector Hydrodynamic Evolution Global Polarization |
| title | Study of $$\Lambda $$ Λ polarization in relativistic nuclear collisions at $$\sqrt{s_\mathrm {NN}}=7.7$$ s NN = 7.7 –200 GeV |
| title_full | Study of $$\Lambda $$ Λ polarization in relativistic nuclear collisions at $$\sqrt{s_\mathrm {NN}}=7.7$$ s NN = 7.7 –200 GeV |
| title_fullStr | Study of $$\Lambda $$ Λ polarization in relativistic nuclear collisions at $$\sqrt{s_\mathrm {NN}}=7.7$$ s NN = 7.7 –200 GeV |
| title_full_unstemmed | Study of $$\Lambda $$ Λ polarization in relativistic nuclear collisions at $$\sqrt{s_\mathrm {NN}}=7.7$$ s NN = 7.7 –200 GeV |
| title_short | Study of $$\Lambda $$ Λ polarization in relativistic nuclear collisions at $$\sqrt{s_\mathrm {NN}}=7.7$$ s NN = 7.7 –200 GeV |
| title_sort | study of lambda λ polarization in relativistic nuclear collisions at sqrt s mathrm nn 7 7 s nn 7 7 200 gev |
| topic | Collision Energy Total Angular Momentum Spin Vector Hydrodynamic Evolution Global Polarization |
| url | http://link.springer.com/article/10.1140/epjc/s10052-017-4765-1 |
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