Masses of new particles containingbquarks

Abstract

Ranges of predicted masses for as yet unseen particles containing $b$ quarks are obtained and compared with previous estimates. Nonrelativistic models are found to yield likely values in the ranges $M\left(B_s\right)=5345-5388\mathrm{}$ MeV, $M\left(B_s^{*}\right)=5400-5433\mathrm{}$ MeV, $M\left(B_c\right)=6194-6292\mathrm{}$ MeV, $M\left(B_c^{*}\right)=6284-6357\mathrm{}$ MeV, $M\left({\Lambda }_b\right)=5600-5630\mathrm{}$ Mev, with ${\Sigma }_b$ and ${\Sigma }_b^{*}$ not far above 5800 MeV.