2018/06/22 by Robert Fleischer, Ruben Jaarsma, Eleftheria Malami +2 · 1 citation
Physics and Astronomy · #CP violation #Dark Matter and Cosmic Phenomena #Electroweak interaction #Hadron #Isospin #Mixing (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Pi #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-018-6397-5
34 pages, 16 figures
arxiv created 2018/06/22 · openalex publication_date 2018/11/01 · arxiv updated 2018/12/05 · openalex created_date 2019/04/01 · openalex updated_date 2026/08/06
The B→ π π ,π K system offers a powerful laboratory to probe strong and weak interactions. Using the isospin symmetry, we determine hadronic B→ π π parameters from data where new measurements of direct CP violation in B0d→ π 0π 0 resolve a discrete ambiguity. With the help of the SU(3) flavour symmetry, the B→ π π parameters can be converted into their B→ π K counterparts, thereby allowing us to make predictions of observables. A particularly interesting decay is B0d→ π 0 KS 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 B0d→ π 0 KS , which are the theoretically cleanest B→ π K probes. Interestingly, they show tensions with respect to the Standard Model. Should this B→ π K 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 B→ π K dynamics and to obtain insights into the electroweak penguin sector with unprecedented precision.