Engineering topics

Roberts, W

Publications and source records attributed to Roberts, W.

2 records

DOE OSTI2010

Rare {Lambda}{sub b} decays in a quark model

Hadronic form factors for the rare weak transitions {Lambda}{sub b{yields}{Lambda}}{sup (*)} are calculated using a nonrelativistic quark model. The form factors obtained in this way are found to satisfy the relationships expecetd from the heavy quark effective theory. Differential decay rates and branching ratios are calculated for the dileptonic decays {Lambda}{sub b{yields}{Lambda}}{sup (*)}l{sup +}l{sup -}, for both ground state and excited daughter baryons. Inclusion of the long distance contributions from charmonium resonances significantly enhances the decay rates. Future work is outlined.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗

DOE OSTI2010

Strong Decays of Heavy Baryons in the {sup 3}P{sub 0} Model

The results of a recent quark model for the spectrum of heavy baryons are presented. Comparison of the experimental spectrum with the model masses allow the quantum numbers of a number of experimental states to be inferred. However, the quantum numbers of a number of the experimental states remain ambiguous, as more than one model state is predicted to have a mass similar to the experimental mass. This ambiguity can be removed by examining other properties of the states, such as their hadronic decays. Future work on these strong decays is outlined.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗