Inclusive rare $Λ_b$ decays to photon
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913539092905984 |
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| author | Loparco, Francesco |
| author_facet | Loparco, Francesco |
| contents | Inclusive $H_b \to X_s \, γ$ decays, with $H_b$ a beauty baryon, are treated exploiting an expansion up to the third order in the inverse of the $b$ quark mass $m_b$ and to LO in $α_s$, keeping the dependence on the hadron spin. Double distribution $\frac{d^2Γ}{dy \, d \cos θ_P}$ is computed for polarized baryons, with $y = 2 \, E_γ/ m_b$, $E_γ$ the photon energy and $θ_P$ the angle between the baryon spin vector and the photon momentum in the $H_b$ rest-frame. Modifications to the photon polarization asymmetry can probe effects of physics beyond the Standard Model. A systematic method to treat the singular terms in the photon energy spectrum obtained by the OPE is proposed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_06737 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Inclusive rare $Λ_b$ decays to photon Loparco, Francesco High Energy Physics - Phenomenology Inclusive $H_b \to X_s \, γ$ decays, with $H_b$ a beauty baryon, are treated exploiting an expansion up to the third order in the inverse of the $b$ quark mass $m_b$ and to LO in $α_s$, keeping the dependence on the hadron spin. Double distribution $\frac{d^2Γ}{dy \, d \cos θ_P}$ is computed for polarized baryons, with $y = 2 \, E_γ/ m_b$, $E_γ$ the photon energy and $θ_P$ the angle between the baryon spin vector and the photon momentum in the $H_b$ rest-frame. Modifications to the photon polarization asymmetry can probe effects of physics beyond the Standard Model. A systematic method to treat the singular terms in the photon energy spectrum obtained by the OPE is proposed. |
| title | Inclusive rare $Λ_b$ decays to photon |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.06737 |