A broad pseudovector glueball from holographic QCD

Brünner, Frederic; Leutgeb, Josef; Rebhan, Anton

doi:10.1016/j.physletb.2018.11.043

Cited by 17 publications

(10 citation statements)

References 63 publications

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“…Afterwards, we examine the possible decay processes and compute the associated decay rates with the effective Hamiltonian. We find these decay rates are in agreement with the previous works by using this model as in [14,15,16,19] since they are proportional to λ −1 . Then by comparing the quantum numbers of the baryonic states with some experimental data and employing the identification of baryonic states in [22], we find that one decay process might be realistic and could be interpreted as the decay of baryonic B-meson involving the glueball candidate f 0 (1710) as discussed in [8,9,10].…”

Section: Discussionsupporting

confidence: 93%

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Holographic description of heavy-flavored baryonic matter decay involving glueball

2019

Phys. Rev. D

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We holographically investigate the decay of heavy-flavoured baryonic hadron involving glueball by using the Witten-Sakai-Sugimoto model. Since baryon in this model is recognized as the D4-brane wrapped on S 4 and the glueball field is identified as the bulk gravitational fluctuations, the interaction of the bulk graviton and the baryon brane could be naturally interpreted as glueball-baryon interaction through the holography which is nothing but the close-open string interaction in string theory. In order to take account into the heavy flavour, an extra pair of heavy-flavoured branes separated from the other flavour branes with a heavylight open string is embedded into the bulk. Due to the finite separation of the flavour branes, the heavy-light string creates massive multiplets which could be identified as the heavy-light meson fields in this model. As the baryon brane on the other hand could be equivalently described by the instanton configuration on the flavour brane, we solve the equations of motion for the heavy-light fields with the Belavin-Polyakov-Schwarz-Tyupkin (BPST) instanton solution for the N f = 2 flavoured gauge fields. Then with the solutions, we evaluate the soliton mass by deriving the flavoured onshell action in strongly coupling limit and heavy quark limit. After the collectivization and quantization, the quantum mechanical system for glueball and heavy-flavoured baryon is obtained in which the effective Hamiltonian is time-dependent. Finally we use the standard technique for the time-dependent quantum mechanical system to analyze the decay of heavy-flavoured baryon involving glueball and we find one of the decay process might correspond to the decay of baryonic B-meson involving the glueball candidate f 0 (1710). This work is a holographic approach to study the decay of heavy-flavoured hadron in nuclear physics.

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Section: Discussionsupporting

confidence: 93%

“…Along this direction, decay of glueball into mesons has been widely studied with this model e.g. in [14,15,16] 2 .…”

Section: Introductionmentioning

confidence: 99%

Holographic description of heavy-flavored baryonic matter decay involving glueball

2019

Phys. Rev. D

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“…where Tr denotes symmetrized trace, µ 8 = (2π) −8 l −(9) s , and F = dA + A ∧ A is the field strength tensor for the nonabelian flavor gauge fields living on the D8-branes. (B 2 is the bulk Kalb-Ramond 2-form field; its normalizable modes contain the pseudovector (1 +− ) glueballs of the dual gauge theory [29,30]. )…”

Section: Inclusion Of Quarks and U (1) A Anomalymentioning

confidence: 99%

Witten-Veneziano mechanism and pseudoscalar glueball-meson mixing in holographic QCD

Leutgeb

Rebhan

2020

Phys. Rev. D

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We revisit the U(1) A anomaly in the holographic model of low-energy QCD by Witten, Sakai, and Sugimoto, presenting a new and direct derivation of the Witten-Veneziano mechanism for generating the mass of the η through an anomalous mixing of the Ramond-Ramond C 1 field with the singlet component of the pseudoscalar mesons. The latter turns out to have a kinetic mixing with the normalizable modes of the C 1 field representing pseudoscalar glueballs, yielding additional vertices for their production and their decay that dominate over those of the unmixed case considered previously in the Witten-Sakai-Sugimoto model. The leading channel is predicted to be decay into two vector mesons, followed in importance by decay into three pseudoscalar mesons. The issue of production of pseudoscalar glueballs in radiative J/ψ decays and in double diffractive processes is also discussed briefly.

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“…Even in the 2.2 GeV case, the ratio of 7% to create the φφ means all three decay channels should be observable. Other predictions for holographic glueball decays are in [52][53][54][55][56].…”

Section: Glueball Decaysmentioning

confidence: 99%

Excited mesons, baryons, glueballs and tetraquarks: predictions of the Holography Inspired Stringy Hadron model

Sonnenschein

Weissman

2019

Eur. Phys. J. C

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In this note we collect and summarize the predictions of the Holography Inspired Stringy Hadron (HISH) model. Following a brief review of the model, we list the masses and widths of predicted excited states across the spectrum, based on placing the different hadrons on the non-linear Regge trajectories of a string with massive endpoints. Our predicted states include: (i) Light, heavy-light and heavy-heavy mesons. (ii) Baryons, including charmed, doubly charmed and bottom baryons. (iii) Glueballs, together with a method to disentangle them from flavorless mesons. (iv) Genuine tetraquarks, which are not "molecules" of hadrons, and are characterized by their decay into a baryon and an anti-baryon.

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A broad pseudovector glueball from holographic QCD

Cited by 17 publications

References 63 publications

Holographic description of heavy-flavored baryonic matter decay involving glueball

Holographic description of heavy-flavored baryonic matter decay involving glueball

Witten-Veneziano mechanism and pseudoscalar glueball-meson mixing in holographic QCD

Excited mesons, baryons, glueballs and tetraquarks: predictions of the Holography Inspired Stringy Hadron model

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