Λ( Λ ¯ $ \bar {\Lambda } $ ) polarization in Au+Au collisions at RHIC
Initial large global angular momentum in non-central relativistic heavy-ion collisions can produce strong vorticity, and through the spin-orbit couping, causes the spin of particles to align with the system’s global angular momentum. We present the azimuthal angle dependent (relative to the first-or...
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2019-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2019/11/epjconf_ismd18_04003.pdf |
| Summary: | Initial large global angular momentum in non-central relativistic heavy-ion collisions can produce strong vorticity, and through the spin-orbit couping, causes the spin of particles to align with the system’s global angular momentum. We present the azimuthal angle dependent (relative to the first-order plane) global polarization for Λ hyperons in midcentral Au+Au collisions at
S
NN
$ \sqrt {S_{NN} } $
= 200 GeV. We also present the polarization of Λ hyperons along the beam direction as a function of Λ hyperons’ emission angle relative to the second-order event plane at
S
NN
$ \sqrt {S_{NN} } $
= 200 GeV. This longitudinal polarization is found to increase in more peripheral collision. The implications of the results are discussed. |
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| ISSN: | 2100-014X |