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Potential Constraints from a Bc → τν Measurement on the New Physics Parameter Space

Esselink, Anna (2023) Potential Constraints from a Bc → τν Measurement on the New Physics Parameter Space. Bachelor's Thesis, Physics.


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B meson decays containing leptons can offer important insights into physics beyond the Standard Model through comparison of experimental measurements and their SM estimates. Using the method presented in Fleischer et al., 2021, observables containing ratios of B meson decays and their experimental measurements were used to constrain the Wilson coefficients in this new physics parameter space. The process uses the operator product expansion and effective field theory to derive and define the operators and coefficients. The results found are consistent with those found in Fleischer et al. and are in agreement with the SM at the (1-2)σ level. The impact of the currently unmeasured decay Bc → τν , that the LHCb is planning, was also examined. It was shown that this measurement could remove ambiguity and improve the precision of the new physics Wilson coefficient constraints. Additionally, predictions for Bc → τν branching fraction are provided for scenarios where the new physics effects enter through pseudoscalar or left-handed vector interactions only.

Item Type: Thesis (Bachelor's Thesis)
Supervisor name: Bruyn, K.A.M. de
Degree programme: Physics
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 10 Jul 2023 13:35
Last Modified: 10 Jul 2023 13:35

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