Binwise exploration of vector couplings in $B_s \to D_s^{(*)} τ\bar ν_τ$ decays
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
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2024
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| _version_ | 1866915535348826112 |
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| author | Yadav, Ajay Kumar Sahoo, Suchismita |
| author_facet | Yadav, Ajay Kumar Sahoo, Suchismita |
| contents | Recent results from the LHCb experiment have confirmed that lepton flavor universality is upheld in flavor-changing neutral current processes, such as $B \to K^{(*)} l^+ l^-$. However, discrepancies remain in the charged current sector, raising questions about the universality of lepton flavors in these processes. To explore this issue, we investigate the decays $B_s \to D_s^{(*)} τ\bar ν_τ$ in different $q^2$ bins, which involve the $b \to c τ\bar ν_τ$ transition. We employ a model-independent approach to analyze potential new physics by fitting both real and complex (axial)vector coefficients to the existing $b \to (u, c) τ\bar ν_τ$ data. Our analysis enables us to calculate the branching ratios and angular distributions for the $B_s \to D_s^{(*)} τ\bar ν_τ$ decays in four different $q^2$ bins. Additionally, we evaluate whether lepton flavor universality is maintained in these charged current decays or if deviations suggest the presence of new physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_06100 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Binwise exploration of vector couplings in $B_s \to D_s^{(*)} τ\bar ν_τ$ decays Yadav, Ajay Kumar Sahoo, Suchismita High Energy Physics - Phenomenology Recent results from the LHCb experiment have confirmed that lepton flavor universality is upheld in flavor-changing neutral current processes, such as $B \to K^{(*)} l^+ l^-$. However, discrepancies remain in the charged current sector, raising questions about the universality of lepton flavors in these processes. To explore this issue, we investigate the decays $B_s \to D_s^{(*)} τ\bar ν_τ$ in different $q^2$ bins, which involve the $b \to c τ\bar ν_τ$ transition. We employ a model-independent approach to analyze potential new physics by fitting both real and complex (axial)vector coefficients to the existing $b \to (u, c) τ\bar ν_τ$ data. Our analysis enables us to calculate the branching ratios and angular distributions for the $B_s \to D_s^{(*)} τ\bar ν_τ$ decays in four different $q^2$ bins. Additionally, we evaluate whether lepton flavor universality is maintained in these charged current decays or if deviations suggest the presence of new physics. |
| title | Binwise exploration of vector couplings in $B_s \to D_s^{(*)} τ\bar ν_τ$ decays |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.06100 |