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45 papers · 1 filter
Charmed-strange Meson Spectrum: Old and New Problems
Jorge Segovia, David R. Entem, Francisco Fernandez
The LHCb Collaboration has recently reported the observation for the first time of a spin- resonance in the heavy quark sector. They have shown that the struc…
Adiabaticity and color mixing in tetraquark spectroscopy
Javier Vijande, Alfredo Valcarce, Jean-Marc Richard
We revisit the role of color mixing in the quark-model calculation of tetraquark states, and compare simple pairwise potentials to more elaborate string models with three- and four…
Semileptonic decays of spin-1/2 doubly charmed baryons
C. Albertus, E. Hernandez, J. Nieves
We evaluate exclusive semileptonic decays of ground-state spin-1/2 doubly heavy charmed baryons. The decays are driven by a transition at the quark level. Our form facto…
New gamma ray signal from gravitationally boosted neutralinos at the galactic center
M. Cannoni, M. E. Gomez, M. A. Perez-Garcia +1
We discuss on the possibility that colliding dark matter particles in the form of neutralinos may be gravitationally boosted near the super-massive black hole at the galactic cente…
system: A challenge for ANDA
T. F. Carames, A. Valcarce
We study the system by means of a chiral constituent quark model. This model, tuned in the description of the baryon and meson spectra as well as the interaction, p…
Heavy Quark Spin Symmetry and Heavy Baryons: Electroweak Decays
C. Albertus, J. E. Amaro, E. Hernandez +1
Heavy quark spin symmetry is discussed in the context of single and doubly heavy baryons. A special attention is paid to the constraints/simplifications that this symmetry imposes…