English

Status and new results on the Zb resonances

High Energy Physics - Experiment 2013-03-26 v2 High Energy Physics - Phenomenology

Abstract

Recently Belle observed two charged bottomonium-like states, Zb(10610) and Zb(10650), that are produced in the Upsilon(5S) -> Zb pi transitions and that decay to Upsilon(nS) pi (n=1,2,3) and h_b(mP) pi (m=1,2) channels. The masses of these states are close to the BBˉB\bar{B}^* and BBˉB^*\bar{B}^* thresholds, and their favored spin-parities are JP=1+J^P=1^+. We review status and new results on the Zb states, that include the observation of the ZbB()BˉZ_b\to B^{(*)}\bar{B}^* decays and an evidence for the neutral member of the Zb isotriplet. All properties of the Zb states are consistent with their molecular interpretation.

Keywords

Cite

@article{arxiv.1303.0101,
  title  = {Status and new results on the Zb resonances},
  author = {Alexander Bondar and Roman Mizuk},
  journal= {arXiv preprint arXiv:1303.0101},
  year   = {2013}
}

Comments

PoS(Confinement X)156, 7 pages; misprint corrected