2018/10/31 by V. Baru, E. Epelbaum, J. Gegelia +4 · 1 citation
Physics and Astronomy · #Effective field theory #Field (mathematics) #Field theory (psychology) #Hadron #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #Spin (aerodynamics) #Symmetry (geometry) #hep-ph #nucl-th
paper · pdf · doi:10.1140/epjc/s10052-019-6560-7
published as Eur. Phys. J. C (2019) 79:46 · 7 pages, extended discussions, added references, version to appear in Eur. Phys. J. C
openalex created_date 2018/10/26 · openalex publication_date 2019/01/01 · arxiv created 2019/01/21 · arxiv updated 2019/01/23 · openalex updated_date 2026/08/05
The possibility for a common effective field theory for hadronic molecules with different heavy-quark flavours is examined critically. It is argued that such a theory does not allow one to draw definite conclusions for doubly heavy molecules. In particular, it does not allow one to relate binding energies for the molecules in the c -quark and b -quark sectors with controlled uncertainties. Therefore, while this kind of reasoning does not preclude from employing heavy-quark spin symmetry for charmonium- and bottomonium-like states separately within a well established effective field theory framework, relations between different heavy-quark sectors can only be obtained using phenomenological approaches with uncontrolled uncertainties.