Decays of Z(b) -> Upsilon pi via triangle diagrams in heavy meson molecules

作者：Ohkoda S^*; Yasui S; Hosaka A

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2014, 89(7): 074029.

DOI：10.1103/PhysRevD.89.074029

Bottomoniumlike resonances Z(b)(10610) and Z(b)(')(10650) are good candidates to be hadronic molecules composed of B (B) over bar* (or B*(B) over bar) and B*(B) over bar*, respectively. In this paper, considering Z(b)((')) as heavy meson molecules, we investigate the decays of Z(b)(()'()+) -> Upsilon (nS)pi(+) in terms of the heavy meson effective theory. We find that the intermediate B-(*) and (B) over bar ((*)) meson loops and the form factors play a significant role in reproducing the experimental values of the decay widths.

• 出版日期2014-4-11