2007/06/14 by Marek Karliner, Karliner, Marek, Boaz Keren-Zur +5 · 2 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research
paper · pdf · doi:10.48550/arxiv.0706.2163
The recent observation by CDF of Sigmab+- (uub and ddb) baryons within 2 MeV of the predicted Sigmab - Lambdab splitting has provided strong confirmation for the theoretical approach based on modeling the color hyperfine interaction. We now apply this approach to predict the masses of the Xib family of baryons with quark content usb and dsb - the ground state Xib at 5790 to 5800 MeV, and the excited states Xib^' and Xib^*. The main source of uncertainty is the method used to estimate the mass difference mb - mc from known hadrons. We verify that corrections due to the details of the interquark potential and to Xib-Xib^' mixing are small.