Scrutinizing New Physics in Semi-leptonic $B_{c}\rightarrow J/ψτν$ Decay
| Autor: | Tang, Ru-Ying, Huang, Zhuo-Ran, Lü, Cai-Dian, Zhu, Ruilin |
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| Rok vydání: | 2022 |
| Předmět: | |
| DOI: | 10.48550/arxiv.2204.04357 |
| Popis: | We perform a global analysis of the $b\to cτν$ data using the recent lattice results on the $B_c\to J/ψ$ vector and axial-vector form factors. To explore the effects from the tensor operator of new physics beyond the standard model, we determine the tensor form factors by using the non-relativistic QCD (NRQCD) relations between tensor and (axial-)vector form factors. Based on the lattice+NRQCD form factors, we fit the Wilson coefficients and the new physics couplings in $R_2$, $S_1$ and $U_1$ leptoquark models by including the recently measured $R(Λ_c)$ and imposing the relaxed constraint $\mathcal B(B_c\to J/ψ) 19 pages, 10 figures and 6 tables |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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