TY - JOUR
T1 - Enhanced mixing of partial waves near threshold for heavy meson pairs and properties of Zb(10610) and Zb(10650) resonances
AU - Voloshin, M. B.
PY - 2013/4/11
Y1 - 2013/4/11
N2 - The mixing of S-D partial waves for the heavy meson pairs in the decays Υ(5S)→[B*B̄+c.c.]π and Υ(5S)→B*B ̄*π is considered. It is argued that this mixing, enhanced by the heavy meson mass, is calculable as dominated by a rescattering through pion exchange if the production of the heavy mesons is dominated by S-wave "molecular" resonances Zb(10610) and Z b(10650). The effect of the mixing grows with the c.m. energy E in each channel over the threshold, and may reach 10÷20% in the rate at the upper end of applicability of the discussed approach, E∼15 MeV. It is also argued that the mixing is likely to reach maximum at an energy approximately equal to the mass gap between the thresholds.
AB - The mixing of S-D partial waves for the heavy meson pairs in the decays Υ(5S)→[B*B̄+c.c.]π and Υ(5S)→B*B ̄*π is considered. It is argued that this mixing, enhanced by the heavy meson mass, is calculable as dominated by a rescattering through pion exchange if the production of the heavy mesons is dominated by S-wave "molecular" resonances Zb(10610) and Z b(10650). The effect of the mixing grows with the c.m. energy E in each channel over the threshold, and may reach 10÷20% in the rate at the upper end of applicability of the discussed approach, E∼15 MeV. It is also argued that the mixing is likely to reach maximum at an energy approximately equal to the mass gap between the thresholds.
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U2 - 10.1103/PhysRevD.87.074011
DO - 10.1103/PhysRevD.87.074011
M3 - Article
AN - SCOPUS:84876177605
SN - 1550-7998
VL - 87
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 7
M1 - 074011
ER -