The particle spectra of parity-violating theories: A less radical approach and an upgrade of PSALTer
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866908391120568320 |
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| author | Barker, Will Karananas, Georgios K. Tu, Haochen |
| author_facet | Barker, Will Karananas, Georgios K. Tu, Haochen |
| contents | Due to computational barriers, the effects of parity violation have so far been grossly neglected in gravitational model-building, leading to a serious gap in the space of prior models. We present a new algorithm for efficiently computing the particle spectrum for any parity-violating tensorial field theory. It allows to extract conditions for the absence of massive ghosts without resorting to any manipulation of radicals in cases where the particle masses are irrational functions of the Lagrangian coupling coefficients. We test it against several examples, among which is the most general parity-indefinite Einstein-Cartan/Poincaré gravity that propagates two healthy massive scalars (in addition to the massless graviton). Importantly, we upgrade the PSALTer software in the Wolfram Language to accommodate parity-violating theories. PSALTer is a contribution to the xAct project. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_02111 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The particle spectra of parity-violating theories: A less radical approach and an upgrade of PSALTer Barker, Will Karananas, Georgios K. Tu, Haochen High Energy Physics - Theory General Relativity and Quantum Cosmology High Energy Physics - Phenomenology Due to computational barriers, the effects of parity violation have so far been grossly neglected in gravitational model-building, leading to a serious gap in the space of prior models. We present a new algorithm for efficiently computing the particle spectrum for any parity-violating tensorial field theory. It allows to extract conditions for the absence of massive ghosts without resorting to any manipulation of radicals in cases where the particle masses are irrational functions of the Lagrangian coupling coefficients. We test it against several examples, among which is the most general parity-indefinite Einstein-Cartan/Poincaré gravity that propagates two healthy massive scalars (in addition to the massless graviton). Importantly, we upgrade the PSALTer software in the Wolfram Language to accommodate parity-violating theories. PSALTer is a contribution to the xAct project. |
| title | The particle spectra of parity-violating theories: A less radical approach and an upgrade of PSALTer |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2506.02111 |