Investigating $R_D$ and $R_{D^*}$ anomalies in a Left-Right model with an Inverse Seesaw
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| Format: | Preprint |
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2022
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| author | Ezzat, K. Faisel, G. Khalil, S. |
| author_facet | Ezzat, K. Faisel, G. Khalil, S. |
| contents | We investigate $R_D$ and $R_{D^*}$ anomalies in a low scale left-right symmetric model based on $SU(3)_C\times SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ with a simplified Higgs sector consisting of only one bidoublet and one $SU(2)_R$ doublet. The Wilson coefficients relevant to the transition $b\to cτν$ are derived by integrating out the charged Higgs $H^\pm$ boson, which gives the dominant contributions. We emphasize that the charged Higgs effects, with the complex right-handed quark mixing matrix, can account for both $R_D$ and $R_{D^*}$ anomalies simultaneously, while adhering to a set of significant constraints including, for instance, ${\rm BR}(B^-_c \to τ^- \barν_τ) $ and $B_{s(d)}-\bar B_{s(d)}$ mixing. In relation to this, we show that the predicted values of the $D^\ast$, $τ$ longitudinal polarizations and $P_τ(D)$ can be affected for the set of the parameters of the model resolving the $R_{D,D^\ast}$ anomalies. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2204_10922 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Investigating $R_D$ and $R_{D^*}$ anomalies in a Left-Right model with an Inverse Seesaw Ezzat, K. Faisel, G. Khalil, S. High Energy Physics - Phenomenology We investigate $R_D$ and $R_{D^*}$ anomalies in a low scale left-right symmetric model based on $SU(3)_C\times SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ with a simplified Higgs sector consisting of only one bidoublet and one $SU(2)_R$ doublet. The Wilson coefficients relevant to the transition $b\to cτν$ are derived by integrating out the charged Higgs $H^\pm$ boson, which gives the dominant contributions. We emphasize that the charged Higgs effects, with the complex right-handed quark mixing matrix, can account for both $R_D$ and $R_{D^*}$ anomalies simultaneously, while adhering to a set of significant constraints including, for instance, ${\rm BR}(B^-_c \to τ^- \barν_τ) $ and $B_{s(d)}-\bar B_{s(d)}$ mixing. In relation to this, we show that the predicted values of the $D^\ast$, $τ$ longitudinal polarizations and $P_τ(D)$ can be affected for the set of the parameters of the model resolving the $R_{D,D^\ast}$ anomalies. |
| title | Investigating $R_D$ and $R_{D^*}$ anomalies in a Left-Right model with an Inverse Seesaw |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2204.10922 |