Exploring observable effects of scalar operators beyond SMEFT in the angular distribution of B → K * 0 τ + τ −
Year: 2024
Type: article
Abstract: The S U ( 2 ) L × U ( 1 ) Y invariance of the Standard Model effective field theory (SMEFT) imposes relations among different low-energy effective field theory Wilson coefficients (WCs), any deviations from which would signal the presence of physics beyond SMEFT. In this work, we investigate two such relations ( C S = − C P , C S ′ = C P ′ ) among the scalar and the pseudoscalar new physics WCs that can contribute to b → s τ τ processes. We show that, even when new physics violating these relations would not be measurable in the branching ratios of B s → τ + τ − and B → K ( * ) τ + τ − at HL-LHC and FCC-ee, it can still manifest itself in the angular distribution of B → K * 0 τ + τ − . We identify the combinations of angular observables in this decay channel that are sensitive to scenarios beyond SMEFT. We find that the two observables S 6 c and A 7 , and their combination, have the potential to identify physics beyond SMEFT. Published by the American Physical Society 2024
Authors: Siddhartha Karmakar, Amol Dighe
Institution: Tata Institute of Fundamental Research
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Awards: G1049003178, G680876163
OpenAlex ID: W4405892229