Boundary Bound State Effects in Quantum Wires (2008)
Bellazzini, B., Mintchev, M., Sorba, P.
We investigate the impact of boundary bound states on the dynamics of quantum fields, which propagate on star graphs modeling quantum wires. These states are localized in the vertex of the graph and...
Quantum Field Theory on Star Graphs (2008)
Bellazzini, B., Burrello, M., Mintchev, M., Sorba, P.
We discuss some basic aspects of quantum fields on star graphs, focusing on boundary conditions, symmetries and scale invariance in particular. We investigate the four-fermion bulk interaction in...
Chromomagnetic mechanism for the X(3872) resonance (2006)
Hogaasen, H., Richard, J.M., Sorba, P.
The chromomagnetic interaction, with proper account for flavour-symmetry breaking, is shown to explain the mass and coupling properties of the X(3872) resonance as a $J^{PC}$ = 1$^{++}$ state...
Chromomagnetic mechanism for the X(3872) resonance (2006)
Hogaasen, H., Richard, J.M., Sorba, P.
The chromomagnetic interaction, with proper account for flavour-symmetry breaking, is shown to explain the mass and coupling properties of the X(3872) resonance as a $J^{PC}$ = 1$^{++}$ state...
Chromomagnetic mechanism for the X(3872) resonance (2006)
Hogaasen, H., Richard, J.M., Sorba, P.
The chromomagnetic interaction, with proper account for flavour-symmetry breaking, is shown to explain the mass and coupling properties of the X(3872) resonance as a $J^{PC}$ = 1$^{++}$ state...
A chromomagnetic mechanism for the X(3872) resonance (2005)
Hogaasen, H., Richard, J. M., Sorba, P.
The chromomagnetic interaction, with proper account for flavour-symmetry breaking, is shown to explain the mass and coupling properties of the X(3872) resonance as a $J^{PC}$ = 1$^{++}$ state...
Generalization of the U_q(gl(N)) algebra and staggered models (2001)
Arnaudon, D., Sedrakyan, A., Sedrakyan, T., Sorba, P.
We develop a technique of construction of integrable models with a Z_2 grading of both the auxiliary (chain) and quantum (time) spaces. These models have a staggered disposition of the anisotropy...
Group-Theoretical Aspects of Instantons (1979)
Sorba, P., Roo, M. De, Meyers, C.
We discuss the problem of embeddings in non-Abelian gauge theories. The (ir)redueibility of a gauge field configuration is characterized. For the specific case of instanton solutions we derive a...
On embeddings of gauge groups in Yang-Mills theory (1978)
Sorba, P., Roo, M. De, Meyers, C.
We discuss some group theoretical properties of Yang-Mills theories. We consider conditions necessary and sufficient to decide if the gauge field is reducible and prove some related theorems. We give...