Indirect constraints on third generation baryon number violation
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910410789093376 |
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| author | Beneke, Martin Finauri, Gael Petrov, Alexey A. |
| author_facet | Beneke, Martin Finauri, Gael Petrov, Alexey A. |
| contents | The non-observation of baryon number violation suggests that the scale of baryon-number violating interactions at zero temperature is comparable to the GUT scale. However, the pertinent measurements involve hadrons made of the first-generation quarks, such as protons and neutrons. One may therefore entertain the idea that new flavour physics breaks baryon number at a much lower scale, but only in the coupling to a third generation quark, leading to observable baryon-number violating $b$-hadron decay rates. In this paper we show that indirect constraints on the new physics scale $Λ_{\rm BNV}$ from the existing bounds on the proton lifetime do not allow for this possibility. For this purpose we consider the three dominant proton decay channels $p \to \ell^+ ν_\ell \barν$, $p \to π^+ \barν$ and $p \to π^0 \ell^+$ mediated by a virtual bottom quark. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_09642 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Indirect constraints on third generation baryon number violation Beneke, Martin Finauri, Gael Petrov, Alexey A. High Energy Physics - Phenomenology High Energy Physics - Experiment The non-observation of baryon number violation suggests that the scale of baryon-number violating interactions at zero temperature is comparable to the GUT scale. However, the pertinent measurements involve hadrons made of the first-generation quarks, such as protons and neutrons. One may therefore entertain the idea that new flavour physics breaks baryon number at a much lower scale, but only in the coupling to a third generation quark, leading to observable baryon-number violating $b$-hadron decay rates. In this paper we show that indirect constraints on the new physics scale $Λ_{\rm BNV}$ from the existing bounds on the proton lifetime do not allow for this possibility. For this purpose we consider the three dominant proton decay channels $p \to \ell^+ ν_\ell \barν$, $p \to π^+ \barν$ and $p \to π^0 \ell^+$ mediated by a virtual bottom quark. |
| title | Indirect constraints on third generation baryon number violation |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2404.09642 |