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| Formato: | Preprint |
| Publicado: |
2022
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2203.11056 |
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| _version_ | 1866910321858314240 |
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| author | Willenbrock, Scott |
| author_facet | Willenbrock, Scott |
| contents | We show that the mass and width of an unstable particle are precisely defined by the pole in the complex energy plane, $μ= m - (i/2)Γ$, by identifying the width, $Γ$, with the particle's decay rate and the mass, $m$, with the oscillatory frequency. We find that the physical $Z$ boson mass lies 26 MeV below its quoted value, while the physical $W$ boson mass lies 20 MeV below. We also clarify the various Breit-Wigner formulae that are used to describe a resonance. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2203_11056 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Mass and width of an unstable particle Willenbrock, Scott High Energy Physics - Phenomenology High Energy Physics - Experiment We show that the mass and width of an unstable particle are precisely defined by the pole in the complex energy plane, $μ= m - (i/2)Γ$, by identifying the width, $Γ$, with the particle's decay rate and the mass, $m$, with the oscillatory frequency. We find that the physical $Z$ boson mass lies 26 MeV below its quoted value, while the physical $W$ boson mass lies 20 MeV below. We also clarify the various Breit-Wigner formulae that are used to describe a resonance. |
| title | Mass and width of an unstable particle |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2203.11056 |