Reducing Complex Phases and other Subtleties of CP Violation
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866914864378675200 |
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| author | Bastos, José Filipe Silva-Marcos, J. I. |
| author_facet | Bastos, José Filipe Silva-Marcos, J. I. |
| contents | When extending the SM, e.g. with vector-like quarks (VLQ), one inevitably encounters more than one CP violating complex phases. In this work, we develop a method useful in reducing the number of complex phases in scenarios with one and two VLQs. We show that these VLQ-models can be described with just one or two physical complex phases respectively and present an explicit alternative parametrization for the quark mixing matrix. Making use of this Reduction of Complex Phases in the case of the Bento-Branco-Parada (BBP) model, i.e. the simplest implementation of the Nelson-Barr solution to the strong CP problem, one also recovers the single phase formulation of BBP model. We comment on how this specific scenario can be distinguished from the general VLQ case with weak-basis invariants |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_07158 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Reducing Complex Phases and other Subtleties of CP Violation Bastos, José Filipe Silva-Marcos, J. I. High Energy Physics - Phenomenology When extending the SM, e.g. with vector-like quarks (VLQ), one inevitably encounters more than one CP violating complex phases. In this work, we develop a method useful in reducing the number of complex phases in scenarios with one and two VLQs. We show that these VLQ-models can be described with just one or two physical complex phases respectively and present an explicit alternative parametrization for the quark mixing matrix. Making use of this Reduction of Complex Phases in the case of the Bento-Branco-Parada (BBP) model, i.e. the simplest implementation of the Nelson-Barr solution to the strong CP problem, one also recovers the single phase formulation of BBP model. We comment on how this specific scenario can be distinguished from the general VLQ case with weak-basis invariants |
| title | Reducing Complex Phases and other Subtleties of CP Violation |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.07158 |