Open charm-bottom axial-vector tetraquarks and their properties

S. S. Agaev; K. Azizi; H. Sundu

doi:10.1140/epjc/s10052-017-4892-8

EPJ

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2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2017) 77: 321
https://doi.org/10.1140/epjc/s10052-017-4892-8

Regular Article - Theoretical Physics

Open charm-bottom axial-vector tetraquarks and their properties

S. S. Agaev¹, K. Azizi²^* and H. Sundu³

¹ Institute for Physical Problems, Baku State University, Az 1148, Baku, Azerbaijan
² Department of Physics, Doǧuş University, Acibadem-Kadiköy, 34722, Istanbul, Turkey
³ Department of Physics, Kocaeli University, 41380, Izmit, Turkey

^* e-mail: azizi.hep.ph@gmail.com

Received: 12 March 2017
Accepted: 5 May 2017
Published online: 18 May 2017

Abstract

The charged axial-vector $J^{P}=1^{+}$ tetraquarks $Z_{q}=[cq][\bar{b} \bar{q} ]$ and $Z_{s}=[cs][\bar{b} \bar{s}]$ with the open charm-bottom contents are studied in the diquark–antidiquark model. The masses and meson–current couplings of these states are calculated by employing a QCD two-point sum rule approach, where the quark, gluon and mixed condensates up to eight dimensions are taken into account. These parameters of the tetraquark states $Z_{q}$ and $Z_{s}$ are used to analyze the vertices $Z_q B_c \rho$ and $Z_s B_c \phi$ to determine the strong $g_{Z_qB_c \rho }$ and $g_{Z_sB_c \phi }$ couplings. For these purposes, the QCD light-cone sum rule method and its soft-meson approximation are utilized. The couplings $g_{Z_qB_c \rho }$ and $g_{Z_sB_c \phi }$ , extracted from this analysis, are applied for evaluating the strong $Z_q \rightarrow B_c \rho$ and $Z_s \rightarrow B_c \phi$ decays’ widths, which are essential results of the present investigation. Our predictions for the masses of the $Z_{q}$ and $Z_{s}$ states are confronted with similar results available in the literature.