Baryonia and near-threshold enhancements

Abstract

The baryon-antibaryon spectrum consisting of strange, charm and bottom quarks is studied in the color flux-tube model with a multi-body confinement interaction. Numerical results indicate that many low-spin baryon-antibaryon states can form compact hexaquark states and are stable against the decay into a baryon and an antibaryon. The multi-body confinement interaction as a binding mechanism plays an important role in the formation of the states. They can be searched in the $e^+e^-$ annihilation and charmonium or bottomonium decay if they really exist. The newly reported states, X(1835), X(2370), Y(2175), Y(4360) and Y_b(10890), may be interpreted as $N\bar{N}$, $\Delta\bar{\Delta}$, $\Lambda\bar{\Lambda}$, $\Lambda_c\bar{\Lambda}_c$ and $\Lambda_b\bar{\Lambda}_b$ states, respectively.Comment: 8 pages, 3 figure

InterpretingZc(3900)andZc(4025Deng1, Ping2, Huang3 et al. 2014Phys. Rev. DSelf Cite751700View full textAdd to dashboardCite

“…The color flux-tube structure of an ordinary hadron (qq meson or q 3 baryon) is unique and trivial, the multibody quadratic confinement potential is equivalent to the sum of two-body interactions in the color flux-tube model [17]. In this sense, the color flux-tube model is reduced to the traditional quark model and is therefore not a new model for ordinary hadrons.…”

“…In the model, the color confinement used is not the sum of two-body interaction proportional to a color charge λ c i · λ c j but a multibody one, which has been successfully applied to study multiquark systems [14][15][16][17][18]. The study attempts not only to describe the reported charged states and to enrich the list of the possible charged states, but also to provide a new insight to charged states and to reveal the underlying mechanism behind these novel phenomena.…”

Selected strong decays of η(2225) and ϕ(2170) as Dong1, Faessler2, Gutsche3 et al. 2017Phys. Rev. D531540View full textAdd to dashboardCite

“…Taking into account information about production and decays of the Y(4260) state [7], φ(2170) might be its strange partner. Possible interpretations include a traditional ss state [8][9][10][11], hybrid state [8,12], tetraquark state [13][14][15], ΛΛ( 3 S 1 ) bound state [4,16], and φKK resonance state [17,18].…”

Observation of a Resonant Structure in e+e−→K+KAblikim1, Ачасов2, Adlarson3 et al. 2020Phys. Rev. Lett.41190View full textAdd to dashboardCite

“…The internal constituents of the φ(2170) are still unknown, which has stimulated extensive theoretical discussions. Possible interpretations of the φ(2170) include a conventional 3 3 S 1 or 2 3 D 1 ss state [8][9][10][11], an ssg hybrid [9,12,13], a tetraquark state [14][15][16][17], a ΛΛ( 3 S 1 ) bound state [18][19][20], or a φKK resonance state [21], etc., but no interpretation has yet been established. Each of these theoretical models can accommodate a resonant state with parameters similar to those of the φ(2170), but they predict significantly different partial widths for individual decay modes, especially the K ( * ) K ( * ) decay modes, where the K ( * ) is the ground or excited state of a K meson with different spin-parities.…”