Speaker
Description
Using the Regge-like formula $(M-m_Q)^2=\pi\sigma L$ between hadron mass $M$ and angular momentum $L$ with a heavy quark mass $m_Q$ and a string tension $\sigma$, we analyze heavy-light systems like $D/D_s/B/B_s$ mesons and charmed and bottomed baryons.
Numerical plots are obtained for $D/B$ mesons of experimental data whose slope coefficient becomes nearly equal to 1/2 of that for light mesons as expected, while the slope deviates from 1/2 for $D_s/B_s$.
Assuming that charmed and bottomed baryons consist of one heavy quark and one light cluster of two light quarks (diquark), we apply the formula to all the heavy-light baryons including recently discovered $\Omega_c$'s and find that $\Lambda_c/\Lambda_b$ baryons well satisfy the above formula. We predict the average mass of $\Lambda_b(3/2^+,5/2^+)$ as 6.150 GeV, assignments of $J^P$ of five $\Omega_c$'s. Successful results of $\Lambda_Q$ suggests that these baryons can be safely regarded as heavy quark-light cluster configuration. We also find a universal description for $D/B$ mesons as well as $\Lambda_c/\Lambda_b$ baryons, i.e., one unique line is enough to describe both of charmed and bottomed heavy-light systems.
