Continuing search for new physics in b → sμμ decays: two operators at a time
Abstract
The anomalies in the measurements of observables involving b → sμμ decays, namely R K , R K*, P 5 ' , and B s ϕ , may be addressed by adding lepton-universality-violating new physics contributions to the effective operators O_9,O_{10},O_9^' },O_{10}^' } . We analyze all the scenarios where the new physics contributes to a pair of these operators at a time. We perform a global fit to all relevant data in the b → s sector to estimate the corresponding new Wilson coefficients, O_9^{NP},O_{10}^{NP},O_9^' },O_{10}^' } . In the light of the new data on R K , and R K*, presented in Moriond 2019, we find that the scenarios with new physics contributions to the (O_9^{NP},O_9^') or (O_9^{NP},O_{10}^') pair remain the most favored ones. On the other hand, though the competing scenario (O_9^{NP},O_{10}^{NP}) remains attractive, its advantage above the SM reduces significantly due to the tension that emerges between the R K and R K* measurements with the new data. The movement of the R K measurement towards unity would also result in the re-emergence of the one-parameter scenario C 9 NP = - C 9 '.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- June 2019
- DOI:
- 10.1007/JHEP06(2019)089
- arXiv:
- arXiv:1903.09617
- Bibcode:
- 2019JHEP...06..089A
- Keywords:
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- Beyond Standard Model;
- Heavy Quark Physics;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 20 pages, 2 figures