https://doi.org/10.1140/epjc/s10052-018-6397-5
Regular Article - Theoretical Physics
Exploring 
decays at the high-precision frontier
1
Nikhef, Science Park 105, 1098 XG, Amsterdam, The Netherlands
2
Department of Physics and Astronomy, Vrije Universiteit Amsterdam, 1081 HV, Amsterdam, The Netherlands
3
Theoretische Physik 1, Naturwissenschaftlich-Technische Fakultät, Universität Siegen, 57068, Siegen, Germany
* e-mail: keri.vos@uni-siegen.de
Received:
26
June
2018
Accepted:
30
October
2018
Published online:
16
November
2018
The 
system offers a powerful laboratory to probe strong and weak interactions. Using the isospin symmetry, we determine hadronic 
parameters from data where new measurements of direct CP violation in 
resolve a discrete ambiguity. With the help of the SU(3) flavour symmetry, the parameters can be converted into their 
counterparts, thereby allowing us to make predictions of observables. A particularly interesting decay is 
as it exhibits mixing-induced CP violation. Using an isospin relation, complemented with a robust SU(3) input, we calculate correlations between the direct and mixing-induced CP asymmetries of , which are the theoretically cleanest probes. Interestingly, they show tensions with respect to the Standard Model. Should this puzzle originate from New Physics, electroweak penguins offer an attractive scenario for new particles to enter. We present a strategy to determine the parameters characterising these topologies and obtain the state-of-the-art picture from current data. In the future, this method will allow us to reveal the dynamics and to obtain insights into the electroweak penguin sector with unprecedented precision.
© The Author(s), 2018
