Spectroscopic parameters and decays of the resonance Zb(10610)

Agaev, S. S. (Institute for Physical Problems, Baku State University, 0000 0001 1010 9948, 1148, Baku, Azerbaijan) ; Azizi, K. (Department of Physics, Doǧuş University, Acibadem-Kadiköy, 0000 0001 0842 3532, 34722, Istanbul, Turkey) (School of Physics, Institute for Research in Fundamental Sciences (IPM), 0000 0000 8841 7951, P. O. Box 19395-5531, Tehran, Iran) ; Sundu, H. (Department of Physics, Kocaeli University, 0000 0001 0691 9040, 41380, Izmit, Turkey)

07 December 2017

Abstract: The resonance Zb(10610) is investigated as the diquark–antidiquark Zb=[bu][bd¯] state with spin–parity JP=1+ . The mass and current coupling of the resonance Zb(10610) are evaluated using QCD two-point sum rule and taking into account the vacuum condensates up to ten dimensions. We study the vertices ZbΥ(nS)π(n=1,2,3) by applying the QCD light-cone sum rule to compute the corresponding strong couplings gZbΥ(nS)π and widths of the decays Zb→Υ(nS)π . We explore also the vertices Zbhb(mP)π(m=1,2) and calculate the couplings gZbhb(mP)π and the widths of the decay channels Zb→hb(mP)π . To this end, we calculate the mass and decay constants of the hb(1P) and hb(2P) mesons. The results obtained are compared with experimental data of the Belle Collaboration.

Published in: EPJC 77 (2017) 836
Published by: Springer/Società Italiana di Fisica
DOI: 10.1140/epjc/s10052-017-5421-5
License: CC-BY-3.0

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