Status and new results on the Zb resonances

2013/03/01 by Alexander Bondar, Bondar, Alexander, Roman Mizuk +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #hep-ex #hep-ph

paper · pdf · doi:10.48550/arxiv.1303.0101

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

arxiv created 2013/03/25 · arxiv updated 2013/03/26

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 BB^* and B^*B^* thresholds, and their favored spin-parities are J^P=1⁺. We review status and new results on the Zb states, that include the observation of the Z_b→ B^(*)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.

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