Abstract
Abstract
The experimental resonance ϒ(10860) presents some typical properties of conventional bottomonium states as well as apparently unconventional features. In this talk it is shown that some of the properties of ϒ(10860), namely its mass, dilepton decay width and ππϒ production rates, can be explained from its interpretation as ϒ(5s) bottomonium state, given that one has a consistent description of
b
b
¯
hybrid states. It is also pointed out that other puzzling properties (e.g. the dipion transition rate to hb
) can be understood under the assumption that ϒ(10860) is a mixing of the ϒ(5s) with the ground
b
b
¯
hybrid state.
Subject
General Physics and Astronomy