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| Main Authors: | , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.20897 |
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| _version_ | 1866915085063028736 |
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| author | Satarov, Leonid M. Mishustin, Igor N. Stoecker, Horst |
| author_facet | Satarov, Leonid M. Mishustin, Igor N. Stoecker, Horst |
| contents | Equation of state of uncharged bosonic matter is studied within a field-theoretical approach in the mean-field approximation. Interaction of bosons is described by a scalar field $σ$ with a Skyrme-like potential which contains both attractive and repulsive terms. Additionally we introduce the derivative interaction by including factor $(1+λσ)^{-1}$ in the kinetic part of Lagrangian where $λ> 0$ is the model parameter. Numerical calculations are made for strongly interacting matter composed of $α$ particles. It is shown that ground-state binding energy and equilibrium density of such matter drop with increasing $λ$. The liquid-gas phase transition and the Bose-Einstein condensation are studied by using different thermodynamic variables. We calculate also spinodal lines which give boundaries of metastable states. It is demonstrated that critical temperature decreases with $λ$. Both LGPT and bound condensate states disappear above certain maximum value of $λ$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_20897 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Phase diagram of bosonic matter with additional derivative interaction Satarov, Leonid M. Mishustin, Igor N. Stoecker, Horst High Energy Physics - Phenomenology Equation of state of uncharged bosonic matter is studied within a field-theoretical approach in the mean-field approximation. Interaction of bosons is described by a scalar field $σ$ with a Skyrme-like potential which contains both attractive and repulsive terms. Additionally we introduce the derivative interaction by including factor $(1+λσ)^{-1}$ in the kinetic part of Lagrangian where $λ> 0$ is the model parameter. Numerical calculations are made for strongly interacting matter composed of $α$ particles. It is shown that ground-state binding energy and equilibrium density of such matter drop with increasing $λ$. The liquid-gas phase transition and the Bose-Einstein condensation are studied by using different thermodynamic variables. We calculate also spinodal lines which give boundaries of metastable states. It is demonstrated that critical temperature decreases with $λ$. Both LGPT and bound condensate states disappear above certain maximum value of $λ$. |
| title | Phase diagram of bosonic matter with additional derivative interaction |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2412.20897 |