7 papers
Isosinglet-isotriplet mixing and the lineshape
Davide Germani, Benjamin Grinstein
We investigate the lineshapes of the in decays production within a framework that incorporates two underlying QCD configurations: a compact isosinglet state a…
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…
Positivity of the effective range for finite range attractive potentials with a repulsive core
Davide Germani
In the phenomenological study of exotic hadrons, the sign of the effective range, , is invoked as a criterion to distinguish between compact multiquark configurations (associa…
A New Look at the X Compositeness from its Lineshape
A. Carducci, G. Cianti, P. D'Annibali +2
The existing analyses on the X(3872) lineshape are consistent with the hypothesis that it is a compact particle composed of four quarks. This conclusion follows from fitting availa…
On the Atomki nuclear anomaly after the MEG-II result
Daniele Barducci, Davide Germani, Marco Nardecchia +2
Recent experimental results from the Atomki collaboration have reported the observation of anomalous effects in Beryllium, Helium and Carbon nuclear transitions that could hint at…
Tetraquarks in the Born-Oppenheimer approximation
Davide Germani, Benjamin Grinstein, Antonio Davide Polosa
The conventional loosely bound molecule interpretation of the is not compatible with the recent LHCb experimental measurement of the ratio of branching fractions $\mathca…