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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2605.08861 |
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| _version_ | 1866910205030170624 |
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| author | Lee, Jong-Phil |
| author_facet | Lee, Jong-Phil |
| contents | We suggest three scalar leptoquarks, $S_1$, ${\tilde R}_2$, and $S_3$ which couple exclusively to the 3rd generation of leptons to explain the $B$ anomalies. The scalar singlet $S_1$ can explain $R(D^{(*)})$, while the doublet ${\tilde R}_2$ is needed to fit the branching ratio ${\rm Br}(B\to K^{(*)}ν{\barν})$ via the right-handed Wilson coefficients $C_R^ν$. A strong constraint from $Δm_{B_s}$ requires triplet $S_3$ where the mixing term between $S_1$ and $S_3$ is important. Our analysis suggests subdominant $C_{V_L}<0$ and dominant $C_{S_L} >0$ and lepton-flavor universality violating $C_9^{\rm LQ} \approx +1$. The masses are expected to be $M_{S_1}\sim M_{{\tilde R}_2} < M_{S_3} \lesssim 3$ TeV, which can be probed in future colliders. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_08861 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | $B$ anomalies and the tauphilic leptoquark model Lee, Jong-Phil High Energy Physics - Phenomenology We suggest three scalar leptoquarks, $S_1$, ${\tilde R}_2$, and $S_3$ which couple exclusively to the 3rd generation of leptons to explain the $B$ anomalies. The scalar singlet $S_1$ can explain $R(D^{(*)})$, while the doublet ${\tilde R}_2$ is needed to fit the branching ratio ${\rm Br}(B\to K^{(*)}ν{\barν})$ via the right-handed Wilson coefficients $C_R^ν$. A strong constraint from $Δm_{B_s}$ requires triplet $S_3$ where the mixing term between $S_1$ and $S_3$ is important. Our analysis suggests subdominant $C_{V_L}<0$ and dominant $C_{S_L} >0$ and lepton-flavor universality violating $C_9^{\rm LQ} \approx +1$. The masses are expected to be $M_{S_1}\sim M_{{\tilde R}_2} < M_{S_3} \lesssim 3$ TeV, which can be probed in future colliders. |
| title | $B$ anomalies and the tauphilic leptoquark model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2605.08861 |