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Spectroscopy and decays of the fully-heavy tetraquarks | | Muhammad Naeem Anwar
; Jacopo Ferretti
; Feng-Kun Guo
; Elena Santopinto
; Bing-Song Zou
; | | Date: |
6 Oct 2017 | | Abstract: | We discuss the possible existence of the fully-heavy tetraquarks. We
calculate the ground-state energy of the $bb ar b ar b$ bound state, where
$b$ stands for the bottom quark, in a nonrelativistic effective field theory
framework with one-gluon-exchange (OGE) color Coulumb interaction, and in a
relativized diquark model, characterized by OGE plus a confining potential. Our
analysis advocates the existence of uni-flavor heavy four-quark bound states.
The ground state $bbar bar b$ tetraquark mass is predicted to be
$(18.72pm0.02)$ GeV. Mass inequality relations among the lowest
$QQar{Q}ar{Q}$ state, where $Qin {c, b}$, and the corresponding heavy
quarkonia are presented, which give the lower limit on the mass of
$QQar{Q}ar{Q}$. The possible decays of the lowest $bbar{b}ar{b}$ are
highlighted which might provide useful references to search for them in ongoing
LHC experiments, and its width is estimated to be a few tens of MeV. | | Source: | arXiv, 1710.2540 | | Services: | Forum | Review | PDF | Favorites | |
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