TY - JOUR
T1 - Contribution of Zb resonances to (5S) →πππχb
AU - Li, Xin
AU - Voloshin, M. B.
PY - 2014/7/22
Y1 - 2014/7/22
N2 - We discuss the recently presented Belle results on the decays ?(5S)→πππχbJ(1P). The data indicate that in addition to the ω emission, ?(5S)→ωχbJ, there is a significant nonresonant background in the three pion spectrum. We suggest that a sizable fraction of this background may be associated with the cascade process ?(5S) →πZb→πρχb involving the Zb(10610) and Zb(10650) resonances. If confirmed by the data, this would be the first observation of transition from the Zb resonances to lower bottomonium with emission of a light meson state different from a single pion, which may provide a new input in understanding of the internal dynamics of these resonances.
AB - We discuss the recently presented Belle results on the decays ?(5S)→πππχbJ(1P). The data indicate that in addition to the ω emission, ?(5S)→ωχbJ, there is a significant nonresonant background in the three pion spectrum. We suggest that a sizable fraction of this background may be associated with the cascade process ?(5S) →πZb→πρχb involving the Zb(10610) and Zb(10650) resonances. If confirmed by the data, this would be the first observation of transition from the Zb resonances to lower bottomonium with emission of a light meson state different from a single pion, which may provide a new input in understanding of the internal dynamics of these resonances.
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U2 - 10.1103/PhysRevD.90.014036
DO - 10.1103/PhysRevD.90.014036
M3 - Article
AN - SCOPUS:84904988951
SN - 1550-7998
VL - 90
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 1
M1 - 014036
ER -