31. However, the postulated phenomenon of color confinement permits only bound states of gluons, forming massive particles. 32. The top and antitop quarks form a bound state that is a composite Higgs boson field. 33. Quarkonia are bound states of heavy flavour quarks ( charm or bottom ) and their antiquarks. 34. Normalizations to the charge and energy-momentum tensor of the bound state lead to the same equation. 35. In resonant excitation, the core electron is promoted to a bound state in the conduction band. 36. Therefore, the quasi bound states were directly revealed. 37. This Hamiltonian has pure point spectrum; this is typical for bound state Hamiltonians in quantum mechanics. 38. Positronium is the bound state of an electron and a positron and therefore the lightest atom. 39. This can not occur for neutral atoms with low-lying bound states which are already filled by electrons. 40. On a half line the spectrum contains boundary bound states in addition to the solitons and breathers.
