Searching for New Physics in Rare \(K\) and \(B\) Decays without \(|V_{cb}|\) and \(|V_{ub}|\) Uncertainties
Andrzej J. Buras, Elena Venturini
Abstract
We reemphasize the strong dependence of the branching ratios B(K + + ) and B(K L 0 ) on |V cb | that is stronger than in rare B decays, in particular for K L 0 . Thereby the persistent tension between inclusive and exclusive determinations of |V cb | weakens the power of these theoretically clean decays in the search for new physics (NP). We demonstrate how this uncertainty can be practically removed by considering within the SM suitable ratios of the two branching ratios between each other and with other observables like the branching ratios for
Topics & Concepts
PhysicsPhysics beyond the Standard ModelParticle physicsNuclear physicsParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsComputational Physics and Python Applications