Femtoscopy of the Origin of the Nucleon Mass

Krein, G.; Peixoto, Thiago Carvalho

doi:10.1007/s00601-020-01581-1

Cited by 18 publications

(16 citation statements)

References 67 publications

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“…Consequently, the VMD assumption is false for heavy vector-mesons. Furthermore, there is no model-independent way to estimate and/or correct for the degree by which it distorts any interpretation of the e + p → e + V + p reaction in terms of the V + p → V + p process; and it is only the latter for which a QCD multipole expansion has been used to draw connections with the proton's glue distribution [10]. Stated figuratively, in order to ensure a quantitatively accurate analysis of e + p → e + V + p, one would need to use…”

Section: Momentum-dependent Interactionmentioning

confidence: 99%

“…The interaction of a heavy vector-meson, J/ψ or ϒ, with a proton target offers prospects for access to a QCD van der Waals interaction, generated by multiple gluon exchange [1,2], and the QCD trace anomaly [3,4]. The former is of interest because it may relate to, inter alia, the observation of hiddencharm pentaquark states [5]; whereas the latter has received attention owing to its connection with emergent hadron mass (EHM), the phenomenon that is seemingly responsible for roughly 99% of the visible mass in the Universe [6][7][8][9][10][11][12]. a e-mail: xuyz@smail.nju.edu.cn b e-mail: siyangchen@smail.nju.edu.cn c e-mail: zqyao@smail.nju.edu.cn d e-mail: binosi@ectstar.eu e e-mail: phycui@nju.edu.cn f e-mail: cdroberts@nju.edu.cn (corresponding author)…”

Section: Introductionmentioning

confidence: 99%

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Vector-meson production and vector meson dominance

Chen

Yao

et al. 2021

Eur. Phys. J. C

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We consider the fidelity of the vector meson dominance (VMD) assumption as an instrument for relating the electromagnetic vector-meson production reaction $$e + p \rightarrow e^\prime + V + p$$ e + p → e ′ + V + p to the purely hadronic process $$V + p \rightarrow V+p$$ V + p → V + p . Analyses of the photon vacuum polarisation and the photon-quark vertex reveal that such a VMD Ansatz might be reasonable for light vector-mesons. However, when the vector-mesons are described by momentum-dependent bound-state amplitudes, VMD fails for heavy vector-mesons: it cannot be used reliably to estimate either a photon-to-vector-meson transition strength or the momentum dependence of those integrands that would arise in calculations of the different reaction amplitudes. Consequently, for processes involving heavy mesons, the veracity of both cross-section estimates and conclusions based on the VMD assumption should be reviewed, e.g., those relating to hidden-charm pentaquark production and the origin of the proton mass.

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Section: Momentum-dependent Interactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vector-meson production and vector meson dominance

Chen

Yao

et al. 2021

Eur. Phys. J. C

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“…In detail, using Eq. (10) and Table II Integrating Eq. ( 25) over x, one obtains the meansquare transverse light-front extent:…”

Section: Impact Parameter Space Gpd -Hadron Scalementioning

confidence: 99%

“…It has been argued that low-energy elastic scattering of the heavy-mesons V = J/ψ, Υ from the proton can provide insights into connections between the proton mass and QCD's scale anomaly [10]. Direct access to such reactions is difficult.…”

Section: Introductionmentioning

confidence: 99%

Revealing pion and kaon structure via generalised parton distributions

Raya,

Cui,

Chang

et al. 2021

Preprint

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Clear windows onto emergent hadron mass (EHM) and modulations thereof by Higgs boson interactions are provided by observable measures of pion and kaon structure, many of which are accessible via generalised parton distributions (GPDs). Beginning with algebraic GPD Ansätze, constrained entirely by hadron-scale π and K valence-parton distribution functions (DFs), in whose forms both EHM and Higgs boson influences are manifest, numerous illustrations are provided. They include the properties of electromagnetic form factors, impact parameter space GPDs, gravitational form factors and associated pressure profiles, and the character and consequences of all-orders evolution. The analyses predict that mass-squared gravitational form factors are stiffer than electromagnetic form factors; reveal that K pressure profiles are tighter than π profiles, with both mesons sustaining near-core pressures at magnitudes similar to that expected at the core of neutron stars; deliver parameter-free predictions for π and K valence, glue, and sea GPDs at the resolving scale ζ = 2 GeV; and predict that at this scale the fraction of meson mass-squared carried by glue and sea combined matches that lodged with the valence degrees-of-freedom, with a similar statement holding for mass-squared radii.

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“…At a future Electron-Ion Collider (EIC), the electroproduction of these charmonia from nuclei at threshold may be exploited to reveal the existence of hidden-charm pentaquarks [14] and offers prospects for a quantitative estimate of the QCD trace anomaly [15][16][17]. Irrespective of the experiment's aim, the extraction of valuable information from cross sections implies the difficult task of understanding charmonium production and its final-state wave function [18] whose lightfront projections were recently computed in Ref.…”

Section: Pos(charm2020)025mentioning

confidence: 99%

Heavy-meson chiral Lagrangians, effective flavored couplings, SU(4) flavor breaking and their consequences

El-Bennich¹,

Serna²

2021

Proceedings of 10th International Workshop on Charm Physics — PoS(CHARM2020)

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We review heavy quark flavor and spin symmetries, their exploitation in heavy meson effective theories and the flavored couplings of charmed and light mesons in the definition of their effective Lagrangians. We point out how nonperturbative continuum QCD approaches based on Dyson-Schwinger and Bethe-Salpeter equations can be used to calculate strong and leptonic decays of open-charm mesons and heavy quarkonia. The strong decay D * → Dπ serves as a benchmark, as it is the only physical open-charm observable that can be related to the effective Lagrangian's couplings. Nonetheless, a quantitative comparison of D * Dπ, ρDD, ρD * D and ρD * D * couplings for a range of off-shell momenta of the ρ-meson invalidates SU(4) F symmetry relations between these couplings. Thus, besides the breaking of flavor symmetry by mass terms in the Lagrangians, the flavor-symmetry breaching in couplings and their dependence on the ρ-meson virtuality cannot be ignored. We also take the opportunity to present new results for the effective J/ψDD and J/ψD * D couplings. We conclude this contribution with a discussion on how the description of pseudoscalar and vector D, D s , B and B s meson properties can be drastically improved with a modest modification of the flavor-dependence in the Bethe-Salpeter equation.

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Femtoscopy of the Origin of the Nucleon Mass

Cited by 18 publications

References 67 publications

Vector-meson production and vector meson dominance

Vector-meson production and vector meson dominance

Revealing pion and kaon structure via generalised parton distributions

Heavy-meson chiral Lagrangians, effective flavored couplings, SU(4) flavor breaking and their consequences

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