Hyperfine effects in charmed baryons

Doubly Charmed Baryons in Compass

The search for doubly charmed baryons has been a topic for COMPASS from the beginning. Requiring however a complete spectrometer and highest possible trigger rates this measurement has been postponed. The scenario for such a measurement in the second phase of COMPASS is outlined here. First studies of triggering and simulation of the setup have been performed. New rate estimates based on recent...

Charmed baryons in lattice QCD

Masses of singly and doubly charmed baryons are calculated in quenched lattice QCD using an improved action of the D234 type on an anisotropic lattice. The mass differences between spin 3/2 and spin 1/2 baryon states are calculated and compared to mass differences between vector and pseudoscalar mesons. The suppression of spin splittings in mesons containing heavy quarks, characteristic of quen...

Spectator effects in semileptonic decay of charmed baryons

It is shown that the absolute rate of the semileptonic decays of the Ξc baryons can be as much as two times higher than the semileptonic decay rate of Λc due to the Pauli interference of the strange quark. This interference effect is still larger in the semileptonic decay rate of Ωc. An experimental measurement of the difference of these rates would thus provide an important piece of informatio...

Spectroscopy of doubly charmed baryons:

Charmed baryons from lattice QCD