2024/12/06 by M. Shifman, Shifman, M. · 1 citation
Physics and Astronomy · Chemistry · #Cold Atom Physics and Bose-Einstein Condensates #Molecular spectroscopy and chirality #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2412.05440
In connection with recent discoveries of heavy-quark containing exotic states publications discussing Qq diquarks (Q,q stand for a heavy and light quarks, respectively) proliferated in the literature. After a brief summary of the diquark concept I review various general reasons why the Qq diquark (with sufficinetly heavy Q) does not exist. Then I argue (this is the focus of my talk) that the most direct way to confirm non-existence of the Qq diquarks is the study of pre-asymptotic corrections in the inclusive decays of Qqq baryons, e.g. Λb. Since the c quarks are much lighter than b, namely, mb2/mc2∼ 11, traces of the cq attraction in the color anti-triplet spin-0 state may or may not be present in the cqq baryons.