Contact interaction model for the 
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 and 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>η</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:math>
 mesons in a Schwinger-Dyson-Bethe-Salpeter approach to QCD: Masses, decay widths, and transition form factors

Zamora, Bilgai Almeida; Martínez, Enrique Carreon; Segovia, Jorge; Cobos-Martínez, J. J.

doi:10.1103/physrevd.107.114031

Phys. Rev. D

2023

DOI: 10.1103/physrevd.107.114031

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Contact interaction model for the η and η′ mesons in a Schwinger-Dyson-Bethe-Salpeter approach to QCD: Masses, decay widths, and transition form factors

Bilgai Almeida Zamora

Enrique Carreon Martínez

Jorge Segovia

et al.

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Cited by 4 publications

References 67 publications

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Chiral anomaly and the pion transition form factor: Beyond the cutoff

Dang,

Xing,

Sultan

et al. 2023

Phys. Rev. D

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Chiral anomaly and the pion transition form factor: Beyond the cutoff

Dang,

Xing,

Sultan

et al. 2023

Phys. Rev. D

View full text Add to dashboard Cite

Nonperturbative photon qq¯ light front wave functions from a contact interaction model

Shi,

Yang,

Chen

et al. 2024

Phys. Rev. D

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We propose a method to calculate the qq¯ light front wave functions (LFWFs) of photons at low virtuality, i.e., the light front amplitude of γ*→qq¯ at low Q2, based on a light front projection approach. We exemplify this method using a contact interaction model within Dyson-Schwinger equations formalism and obtain the nonperturbative photon qq¯ LFWFs. In this case, we find the nonperturbative effects are encoded in the enhanced quark mass and a dressing function of covariant quark-photon vertex, as compared to the leading order quantum electrodynamics photon qq¯ LFWFs. We then use nonperturbative-effect modified photon qq¯ LFWFs to study the inclusive deep inelastic scattering HERA data in the framework of the color dipole model. The results demonstrate that the theoretical description of data at low Q2 can be significantly improved once the nonperturbative corrections are included in the photon LFWFs. Published by the American Physical Society 2024

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Gravitational form factors of pseudoscalar mesons in a contact interaction

Sultan,

Xing,

Raya

et al. 2024

Phys. Rev. D

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Given the unique role played by the gravitational form factors (GFFs) in unraveling the internal mechanics of hadrons, we examine the GFFs of ground state pseudoscalar mesons π, ηc, ηb and the hypothetical ηs(ss¯). We adopt the coupled framework of Dyson-Schwinger and Bethe-Salpeter equations within a contact interaction and employ a novel approach to the dressed amputated meson-meson scattering amplitude, which makes connection with the energy-momentum tensor and with the GFFs. The resulting GFFs fulfill the anticipated symmetry constraints. The corresponding charge and mass radii and the D term are also computed. We show that the D term for the pseudoscalar mesons is bounded within the (−1,−1/3) range; these bounds correspond to the massless (chiral limit) and infinitely massive cases, respectively. Considering the current interest in the GFFs, understanding the D term of pseudoscalar mesons and their GFFs can provide an important first step for future endeavors in the field. Published by the American Physical Society 2024

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Contact interaction model for the η and η′ mesons in a Schwinger-Dyson-Bethe-Salpeter approach to QCD: Masses, decay widths, and transition form factors

Cited by 4 publications

References 67 publications

Chiral anomaly and the pion transition form factor: Beyond the cutoff

Chiral anomaly and the pion transition form factor: Beyond the cutoff

Nonperturbative photon qq¯ light front wave functions from a contact interaction model

Gravitational form factors of pseudoscalar mesons in a contact interaction

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