Heavy quark symmetry predictions for weakly boundB-meson molecules

2011/09/15 by Thomas Mehen, Joshua W. Powell · 10 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.84.114013

17 pages, 2 figures

arxiv created 2011/09/15 · openalex publication_date 2011/12/14 · arxiv updated 2015/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Recently the Belle collaboration discovered two resonances, Z_b(10610) and Z_b(10650), that lie very close to the BB^* and B^*B^* thresholds, respectively. It is natural to suppose that these are molecular states of bottom and antibottom mesons. Under this assumption, we introduce an effective field theory for the Z_b(10610) and Z_b(10650), as well as similar unobserved states that are expected on the basis of heavy quark spin symmetry. The molecules are assumed to arise from short-range interactions that respect heavy quark spin symmetry. We use the theory to calculate line shapes in the vicinity of B^(*)B^(*) thresholds as well as two-body decay rates of the new bottom meson bound states. We derive new heavy quark spin symmetry predictions for the parameters appearing in the line shapes as well as the total and partial widths of the states.

Cited by

• Exotic hadrons with heavy flavors: X, Y, Z, and related states
• Heavy quark spin symmetry partners of theX(3872)
• Possible assignments of the X(3872) X ( 3872 ) , Z_c(3900) Z c ( 3900 ) , and Z_b(10610) Z b ( 10610 ) as axial-vector molecular states
• Heavy quark spin symmetry breaking in near-thresholdJPC=1--quarkoniumlike resonances
• Study ofBB¯*andB*B¯*interactions inI=1and relationship to theZb(10610),Zb(10650)states
• Is Z_cs(3982) a molecular partner of Z_c(3900) and Z_c(4020) states?
• Remarks on the heavy-quark flavour symmetry for doubly heavy hadronic molecules
• X(3872)production in high energy heavy ion collisions
• Spin partners WbJ from the line shapes of the Zb(10610) and Zb(10650)
• Mixing model for bottomoniumlike Zb resonances

Related

• Consequences of Heavy Quark Symmetries for Hadronic Molecules
• Light Flavour and Heavy Quark Spin Symmetry in Heavy Meson Molecules
• Systematic Study of Hadronic Molecules in the Heavy-Quark Sector
• Deriving the existence ofBB¯*bound states from theX(3872)and heavy quark symmetry
• Predicting New Above-Threshold Molecular States Via Triangular Singularities