ϒ(nl) decay into <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msup><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>⁎</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover></mml:mrow><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>⁎</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:msup></mml:math>

Abstract

We have evaluated the decay modes of the ϒ(4s),ϒ(3d),ϒ(5s),ϒ(6s) states into BB¯,BB¯⁎+c.c.,B⁎B¯⁎,BsB¯s,BsB¯s⁎+c.c.,Bs⁎B¯s⁎ using the P03 model to hadronize the bb¯ vector seed, fitting some parameters to the data. We observe that the ϒ(4s) state has an abnormally large amount of meson-meson components in the wave function, while the other states are largely bb¯. We predict branching ratios for the different decay channels which can be contrasted with experiment for the case of the ϒ(5s) state. While globally the agreement is fair, we call the attention to some disagreement that could be a warning for the existence of more elaborate components in the state.

Topics & Concepts