Tetraquark states in the bottom sector and the status of the Yb(10890) state

被引：0

作者：

Patel, Smruti ^{[1
]}

Vinodkumar, P. C. ^{[1
]}

机构：

[1] Sardar Patel Univ, Dept Phys, Vallabh Vidyanagar 388120, Gujarat, India

来源：

EUROPEAN PHYSICAL JOURNAL C | 2016年 / 76卷 / 07期

关键词：

RELATIVISTIC QUARK-MODEL; HEAVY TETRAQUARKS; DECAY PROPERTIES; MULTIQUARK HADRONS; HIDDEN CHARM; MASS-SPECTRA; MESONS; E(+)E(-); EXOTICA;

D O I：

10.1140/epjc/s10052-016-4186-6

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We have performed an exploratory study of bottom tetraquarks ([bq (b) over bar(q) over bar]; q is an element of u, d) in the diquark-antidiquark framework with the inclusion of spin hyperfine, spin- orbit and tensor components of the one gluon exchange interaction. Our focus here is on the Yb(10890) and other exotic states in the bottom sector. We have predicted some of the bottom counterparts to the charm tetraquark candidates. Our present study shows that if Z(b)(10610) and Z(b)(10650) are diquark- diantiquark states then they have to be first radial excitations only and we have predicted the Z(b)(10650) state as first radial excitation of tetraquark state Xb (10.143- 10.230). We have identified X-b state with J(PC) = 1+-/ 0++ as being the analog of Z(c)(3900). The observation of the X-b will provide a deeper insight into the exotic hadron spectroscopy and is helpful to unravel the nature of the states connected by the heavy quark symmetry. We particularly focus on the lowest P- wave ([bq (b) over bar(q) over bar] states with J PC = 1-by computing their leptonic, hadronic, and radiative decay widths to predict the status of the still controversial Yb(10890) state. Apart from this, we have also shown here the possibility of mixing of P- wave states. In the case of mixing of the 1(--) state with different spin multiplicities, we found that the predicted masses of the mixed P states differ from the Yb(10890) state only by similar to 20MeV energy difference, which can be helpful to resolve further the structure of Yb(10890).

引用

页数：11

共 91 条

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