2008/01/31 by Yan-Rui Liu, Xiang Liu, Wei-Zhen Deng +1 · 4 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-lat #hep-ph #nucl-th
paper · pdf · doi:10.1140/epjc/s10052-008-0640-4
published as Eur.Phys.J.C56:63-73,2008 · 11 pages, 7 figures, 9 tables. The version to appear in EPJC
arxiv created 2008/05/13 · openalex publication_date 2008/06/06 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
After taking into account both the pion and sigma meson exchange potential, we have performed a dynamical calculation of the D0D∗0 system. The σ meson exchange potential is repulsive from heavy quark symmetry and numerically important for a loosely bound system. Our analysis disfavors the interpretation of X(3872) as a loosely bound molecular state if we use the experimental D^∗ Dπ coupling constant g=0.59 and a reasonable cutoff around 1 GeV, which is the typical hadronic scale. Bound state solutions with negative eigenvalues for the DD^∗ system exist only with either a very large coupling constant (two times of the experimental value) or a large cutoff (Λ∼ 6 GeV or β∼ 6 GeV2). In contrast, there probably exists a loosely bound S-wave BB^∗ molecular state. Once produced, such a molecular state would be rather stable since its dominant decay mode is the radiative decay through B^∗→ B γ. Experimental search of these states will be very interesting.