2 papers
hep-ph2026
A New Look at the X Compositeness from its Lineshape
A. Carducci, G. Cianti, P. D'Annibali +2
Available data on the lineshape have been fitted with a Flattè parametrization derived from an effective Lagrangian in which , , and are all elementary fields…
hep-ph2025
The Compact X and Z and their Invisible Molecular Partners
A. Carducci, B. Grinstein, D. Germani +1
We propose a model explaining the strong isospin violations observed in X(3872) decays. The X is assumed to be a compact isosinglet tetraquark and its charged partners to form an i…