Non-strange four quark systems

Barbour, I.M.; Ponting, D. K.

doi:10.1007/bf01421779

Cited by 18 publications

(11 citation statements)

References 26 publications

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“…A wide range of theoretical descriptions of XY Z states is available. These interpretations include: (a) the compact tetraquark (or diquark-antidiquark) model [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]; (b) the meson-meson molecular model [28][29][30][31][32][33][34][35][36][37][38][39]; (c) the interpretation in terms of kinematic or threshold effects caused by a e-mail: jacopo.j.ferretti@jyu.fi (corresponding author) b e-mail: santopinto@ge.infn.it c e-mail: m.anwar@fz-juelich.de (corresponding author) d e-mail: luyu@hiskp.uni-bonn.de virtual particles [40][41][42][43][44][45][46][47][48][49][50][51][52][53][54]. Calculations of meson observables (like the spectrum or the decay widths) within the above pictures, when compared with t...…”

Section: Introductionmentioning

confidence: 99%

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Quark structure of the $$\chi _{\mathrm{c}}(3P)$$ and X(4274) resonances and their strong and radiative decays

et al. 2020

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We calculate the masses of χ c (3P) states with threshold corrections in a coupled-channel model. The model was recently applied to the description of the properties of χ c (2P) and χ b (3P) multiplets (Ferretti and Santopinto in Phys Lett B 789:550, 2019]. We also compute the open-charm strong decay widths of the χ c (3P) states and their radiative transitions. According to our predictions, the χ c (3P) states should be dominated by the charmonium core, but they may also show small meson-meson components. The X (4274) is interpreted as a cc χ c1 (3P) state. More information on the other members of the χ c (3P) multiplet, as well as a more rigorous analysis of the X (4274)'s decay modes, are needed to provide further indications on the quark structure of the previous resonance.

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Section: Introductionmentioning

confidence: 99%

“…AsTable 2, but for the radiative transitions of different charmonia. Our UQM predictions, E1,UQM , are computed according to Eq (10)…”

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confidence: 99%

Quark structure of the $$\chi _{\mathrm{c}}(3P)$$ and X(4274) resonances and their strong and radiative decays

et al. 2020

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“…A wide range of theoretical descriptions of XY Z states is available. These interpretations include: a) the compact tetraquark (or diquarkantidiquark) model [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]; b) the meson-meson molecular model [26][27][28][29][30][31][32][33][34][35]; c) the interpretation in terms of kinematic or threshold effects caused by virtual particles [36][37][38][39][40][41][42][43][44][45][46][47][48][49]. Calculations of meson observables (like the spectrum or the decay widths) within the above pictures, when compared with the experimental data [1], may help to better understand the quark structure of XY Z mesons.…”

Section: Introductionmentioning

confidence: 99%

Quark structure of the $χ_{\rm c}(3P)$ and $X(4274)$ resonances and their strong and radiative decays

Ferretti,

Santopinto,

Anwar

et al. 2020

Preprint

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We calculate the masses of χc(3P ) states with threshold corrections in a coupled-channel model. The model was recently applied to the description of the properties of χc(2P ) and χ b (3P ) multiplets [Phys. Lett. B 789, 550 (2019)]. We also compute the open-charm strong decay widths of the χc(3P ) states and their radiative transitions. According to our predictions, the χc(3P ) states should be dominated by the charmonium core plus small meson-meson components. The X( 4274) is interpreted as a cc χc1(3P ) state. More informations on the other members of the χc(3P ) multiplet, as well as a more rigorous analysis of the X(4274)'s decay modes, are needed to provide further indications on the quark structure of the previous resonance.

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“…Some examples include the X(3872) [2][3][4], X(4140) [5] and X(4260) [6]. The previous states are labeled as suspected exotics and interpreted as compact tetraquark states [7][8][9][10][11][12][13][14][15][16][17][18], meson-meson molecules [19][20][21][22][23][24][25][26][27][28][29], the result of kinematic or threshold effects caused by virtual particles [30][31][32][33][34][35][36][37][38][39], hadro-quarkonia (hadro-charmonia) [40][41][42][43][44][45][46][47][48][49], or the rescattering effects arising by anomalous triangular singularities [50]…”

Section: Introductionmentioning

confidence: 99%

Threshold corrections of $χ_{\rm c}(2P)$ and $χ_{\rm b}(3P)$ states and $J/ψρ$ and $J/ψω$ transitions of the $X(3872)$ in a coupled-channel model

Ferretti,

Santopinto

2018

Preprint

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We calculate the masses of χc(2P ) and χ b (3P ) states with threshold corrections in a coupledchannel model. Here, the meson quarkonium core is augmented by higher Fock components due to pair-creation effects. According to our results, we interpret the resonances characterized by very small threshold corrections, like χ b (3P )'s, as almost pure quarkonia, and those states characterized by non-negligible threshold corrections, like the X(3872), as quarkonium cores plus meson-meson components. We also study the J/ψρ and J/ψω hidden-flavor strong decays of the X(3872). The decays are calculated as the dissociation of one of these components (D 0 D0 * ) into a cc state (J/ψ) plus a light meson (ρ or ω) in a potential model. In particular, our result for the ratio between the X(3872) → J/ψω and J/ψρ widths (0.6) is compatible with the present experimental data (0.8 ± 0.3) within the experimental error.

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Non-strange four quark systems

Cited by 18 publications

References 26 publications

Quark structure of the $$\chi _{\mathrm{c}}(3P)$$ and X(4274) resonances and their strong and radiative decays

Quark structure of the $$\chi _{\mathrm{c}}(3P)$$ and X(4274) resonances and their strong and radiative decays

Quark structure of the $χ_{\rm c}(3P)$ and $X(4274)$ resonances and their strong and radiative decays

Threshold corrections of $χ_{\rm c}(2P)$ and $χ_{\rm b}(3P)$ states and $J/ψρ$ and $J/ψω$ transitions of the $X(3872)$ in a coupled-channel model

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