Abstract
We discuss a model with a SU(2)L doublet vector leptoquark (LQ), motivated by the recent experimental results relating to the lepton universality of \( \overline{B} \) → D(*)\( \tau {\overline{\nu}}_{\tau } \). We find that scalar operators predicted by the LQ are favored to explain the deviations, taking into account the recent LHCb result. We investigate the extensive phenomenology of the model and conclude that Bs → \( \tau \overline{\tau} \), B → \( K\tau \overline{\tau} \), Bu → \( \tau {\overline{\nu}}_{\tau } \) and high-pT di-τ lepton signatures at the LHC will probe the interesting parameter region in the near future.
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Syuhei Iguro and Yuji Omura, work in progress.
Acknowledgments
The authors would like to thank Ulrich Nierste and Teppei Kitahara for the discussion. We also appreciate Felix Wilsch for the great supports on HighPT. S.I. enjoys the support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under grant 396021762-TRR 257. The work of Y. O. is supported by Grant-in-Aid for Scientific research from the MEXT, Japan, No. 19K03867.
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Iguro, S., Omura, Y. A closer look at isodoublet vector leptoquark solution to the \( {R}_{D^{\left(\ast \right)}} \) anomaly. J. High Energ. Phys. 2023, 84 (2023). https://doi.org/10.1007/JHEP11(2023)084
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DOI: https://doi.org/10.1007/JHEP11(2023)084