$μ^-μ^+\to {ν_μ}\barν_μt\bar{t}H$ amplitudes in the Feynman-diagram gauge
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arXiv
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909441982464000 |
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| author | Zheng, Ya-Juan |
| author_facet | Zheng, Ya-Juan |
| contents | We study the process $μ^-μ^+\to {ν_μ}\barν_μt\bar{t}H$ with complex CP violating $ttH$ couplings in the SMEFT with a dimension-6 operator. When the amplitudes are expressed in the Feynman-Diagram gauge, the dominance of the total cross section via the weak boson fusion diagrams is manifest. The high energy behaviour is dictated by the higher-dimensional vertices in the dimension-6 SMEFT operator. These properties are not manifest in the unitary gauge because of subtle cancellation among diagrams. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_19620 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | $μ^-μ^+\to {ν_μ}\barν_μt\bar{t}H$ amplitudes in the Feynman-diagram gauge Zheng, Ya-Juan High Energy Physics - Phenomenology We study the process $μ^-μ^+\to {ν_μ}\barν_μt\bar{t}H$ with complex CP violating $ttH$ couplings in the SMEFT with a dimension-6 operator. When the amplitudes are expressed in the Feynman-Diagram gauge, the dominance of the total cross section via the weak boson fusion diagrams is manifest. The high energy behaviour is dictated by the higher-dimensional vertices in the dimension-6 SMEFT operator. These properties are not manifest in the unitary gauge because of subtle cancellation among diagrams. |
| title | $μ^-μ^+\to {ν_μ}\barν_μt\bar{t}H$ amplitudes in the Feynman-diagram gauge |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2412.19620 |