Project Details
Projekt
Charmless exclusive B decays (A08)
Subject Area
Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
Term
from 2016 to 2024
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 196253076
Exclusive decays of B mesons provide many insights into flavour-changing interactions and CP violation, as well as strong-interaction dynamics. This is particularly true for the purely hadronic final states of mesons without charm due to their large variety of different final states. The theoretical challenge is to provide reliable computations of the decay characteristics, such as branching fractions, asymmetries, polarization fractions and angular distributions. Within the factorization framework, which relies on the large mass of the b-quark, this is accomplished by reducing the decay amplitude to short-distance factors and simpler (though not always simple), long-distance matrix elements. With the increasing precision of measurements, the systematic inclusion of electromagnetic corrections is also of interest. This project aims on the one hand at extending the scope of the theoretical framework to cover more final states, at improving its precision by addressing power-suppressed effects in the heavy quark mass, and by including electromagnetic effects. On the other hand, there is a need for up-to-date predictions in view the LHCb experiment upgrade and, in particular, the new Belle II experiment, which started data taking recently, due their capability of measuring large sets of final states, including those containing neutral particles, with high statistics.
DFG Programme
CRC/Transregios
International Connection
China
Applicant Institution
Rheinische Friedrich-Wilhelms-Universität Bonn
Project Heads
Professor Dr. Martin Beneke; Professor Dr. Cai-Dian Lü
