Hadronic transition form factors from analyticity (A11*)

• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: since 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 196253076

Hadronic transition form factors (TFFs) play a crucial role in the determination of Standard Model parameters from data and for probing potential effects of physics beyond the Standard Model (BSM). At the same time, they also contain dynamical information about the inner structure of the hadrons in question. In principle, TFFs can be calculated ab initio and with great precision using lattice QCD. However, presently and for the immediate future this is not the case for hadronic TFFs of non-local operators, or when hadronic final-state interactions and rescattering effects are important for TFFs of local operators. In such cases, we can use the analyticity properties of the hadronic TFFs and relate them to other and simpler known hadronic matrix elements using standard techniques, such as e.g. hadronic dispersion relations. In this project we aim to improve the descriptions of hadronic TFFs arising in two distinct fields of particle physics: low-energy decay and transition processes, and (semi)leptonic B meson decays.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 110: Symmetries and the Emergence of Structure in Quantum Chromodynamics (QCD)
• Applicant Institution: Rheinische Friedrich-Wilhelms-Universität Bonn
• Project Heads: Dr. Danny van Dyk; Privatdozent Dr. Bastian Kubis