Identifying physics beyond SMEFT in the angular distribution of $Λ_b\rightarrow Λ_c(\rightarrowΛπ)τ\barν_τ$ decay
| Autor: | Karmakar, Siddhartha, Chattopadhyay, Susobhan, Dighe, Amol |
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| Rok vydání: | 2023 |
| Předmět: | |
| DOI: | 10.48550/arxiv.2305.16007 |
| Popis: | Indirect searches of physics beyond the Standard Model (BSM) may be performed using the tool of effective field theory (EFT). In the Standard Model Effective Field Theory (SMEFT), the $SU(2)_L\times U(1)_Y$ symmetry of the Standard Model is linearly realized. However, it is possible that more general EFTs such as the Higgs Effective Field Theory (HEFT) are needed to describe the data. We explore the effects of scalar and vector new-physics operators that contribute to the charged-current processes $b\rightarrow c τν_τ$. The angular distribution of $Λ_b\rightarrow Λ_c(\rightarrowΛπ)τ\barν_τ$ decay is sensitive to the 6-dimensional effective operator $O_V^{LR}\equiv(\barτγ^μP_Lν_τ)(\bar{c}γ_μP_R b)$, which is present in HEFT but suppressed in SMEFT. We identify the angular observables that can have significant contribution from $O_V^{LR}$, and hence would be useful for probing not only BSM physics but also physics beyond SMEFT. 20 pages, 5 figures |
| Databáze: | OpenAIRE |
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