Polarization of spin-1/2 particles with effective spacetime dependent masses
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arXiv
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| Format: | Preprint |
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2023
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| author | Bhadury, Samapan Das, Arpan Florkowski, Wojciech K., Gowthama K. Ryblewski, Radoslaw |
| author_facet | Bhadury, Samapan Das, Arpan Florkowski, Wojciech K., Gowthama K. Ryblewski, Radoslaw |
| contents | Semiclassical expansion of the Wigner function for spin-1/2 fermions having an effective spacetime-dependent mass is used to analyze spin-polarization effects. The existing framework is reformulated to obtain a differential equation directly connecting the particle spin tensor with the effective mass. It reflects the conservation of the total angular momentum in a system. In general, we find that the gradients of mass act as a source of the spin polarization. Although this effect is absent for simple boost-invariant dynamics, an extension to non-boost-invariant systems displays a non-trivial dependence of the spin density on the mass indicating that the spin polarization effects may be intertwined with the phenomenon of chiral restoration. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_12436 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Polarization of spin-1/2 particles with effective spacetime dependent masses Bhadury, Samapan Das, Arpan Florkowski, Wojciech K., Gowthama K. Ryblewski, Radoslaw High Energy Physics - Phenomenology Nuclear Theory Semiclassical expansion of the Wigner function for spin-1/2 fermions having an effective spacetime-dependent mass is used to analyze spin-polarization effects. The existing framework is reformulated to obtain a differential equation directly connecting the particle spin tensor with the effective mass. It reflects the conservation of the total angular momentum in a system. In general, we find that the gradients of mass act as a source of the spin polarization. Although this effect is absent for simple boost-invariant dynamics, an extension to non-boost-invariant systems displays a non-trivial dependence of the spin density on the mass indicating that the spin polarization effects may be intertwined with the phenomenon of chiral restoration. |
| title | Polarization of spin-1/2 particles with effective spacetime dependent masses |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2307.12436 |