Lattice QCD signal for a bottom-bottom tetraquark

Bicudo, Pedro; Wagner, Marc

doi:10.1103/physrevd.87.114511

Cited by 100 publications

(112 citation statements)

References 36 publications

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“…A new method to study this setup has been proposed in [244], and might give new information about the diquark formations. Also systems with two static quarks and two light dynamical antiquarks have been explored [245][246][247][248].…”

Section: Lattice Qcdmentioning

confidence: 99%

Multiquark resonances

2017

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Multiquark resonances are undoubtedly experimentally observed. The number of states and the amount of details on their properties have been growing over the years. It is very recent the discovery of two pentaquarks and the confirmation of four tetraquarks, two of which had not been observed before. We mainly review the theoretical understanding of this sector of particle physics phenomenology and present some considerations attempting a coherent description of the so called X and Z resonances. The prominent problems plaguing theoretical models, like the absence of selection rules limiting the number of states predicted, motivate new directions in model building. Data are reviewed going through all of the observed resonances with particular attention to their common features and the purpose of providing a starting point to further research.

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Section: Lattice Qcdmentioning

confidence: 99%

Multiquark resonances

2017

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“…Especially the dimeson, dibaryon and pentaquark molecular systems with two charm/bottom quarks are particularly interesting, which have have been studied using various models [852,853,854,855,856,857], QCD sum rules [858,859] as well as the lattice QCD [860,861,862]. These hadrons may be produced either at LHC or through heavy ion collisions or through higher bottomonium decays.…”

Section: Hidden-charm Baryonium or Dibaryons With Two Charm Quarksmentioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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In the past decade many charmonium-like states were observed experimentally. Especially those charged charmoniumlike Z c states and bottomonium-like Z b states can not be accommodated within the naive quark model. These charged Z c states are good candidates of either the hidden-charm tetraquark states or molecules composed of a pair of charmed mesons. Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. We list the puzzles and theoretical challenges of these models when confronted with the experimental data. We also discuss possible future measurements which may distinguish the theoretical schemes on the underlying structures of the hidden-charm multiquark states.

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“…Whether a binding is realized away from this limit, as in nature, for charm and bottom quarks, is subject to non-perturbative effects and only lattice QCD calculations can give a rigorous answer to this question. Previous studies have attempted to measure this binding [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], however in [17] 1 we report on the, to our knowledge, first such calculation close to the physical point away from the static limit in the qq bb sector. The study benefits from the use of wall sources and a GEVP analysis.…”

Section: Introduction and Phenomenological Observationsmentioning

confidence: 85%

Heavy and light spectroscopy near the physical point, Part II: Tetraquarks

Francis¹,

Hudspith²,

Lewis³

et al. 2016

Proceedings of 34th Annual International Symposium on Lattice Field Theory — PoS(LATTICE2016)

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Having introduced the ensembles and basic spectrum in Part I of this conference contribution, we focus on results for a doubly heavy tetraquark candidate, qq QQ . Based on phenomenological observations regarding heavy baryon systems, we motivate two possible lattice interpolating operators: a diquark-antidiquark and a meson-meson. We show that these operators exhibit good behaviour both in terms of lattice QCD and their phenomenological interpretation. In particular we study the udbb and sbb flavor combinations and analyze their binding. At the physical point, at finite lattice spacing, we find strong indications for binding of these tetraquark candidates. We comment on possible finite volume effects and search windows for experimental confirmation.34th annual International Symposium on Lattice Field Theory

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Lattice QCD signal for a bottom-bottom tetraquark

Cited by 100 publications

References 36 publications

Multiquark resonances

Multiquark resonances

The hidden-charm pentaquark and tetraquark states

Heavy and light spectroscopy near the physical point, Part II: Tetraquarks

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