Light-front wavefunctions of mesons by design

Li, Meijian; Li, Yang; Chen, Guangyao; Lappi, T.; Vary, James P.

doi:10.48550/arxiv.2111.07087

Cited by 3 publications

(3 citation statements)

References 80 publications

(146 reference statements)

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“…The 𝑓 1𝐿𝐿 characterizes the difference of unpolarized quark distribution between Λ = 0 and Λ = ±1 states. We note that the heavy meson PDFs have been studied by the BLFQ approach and light front models [62][63][64]. closer to unity in Υ than in 𝐽 /𝜓 , as the relativistic effect reduces.…”

Section: Integrated Tmdsmentioning

confidence: 93%

Transverse momentum distributions of valence quark in light and heavy vector mesons

Shi,

Li,

et al. 2022

Preprint

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We study the leading-twist time-reversal even transverse momentum dependent parton distribution functions (TMDs) of light and heavy vector mesons, i.e., the 𝜌, 𝐽 /𝜓 and Υ. We employ the leading Fock-state light front wave functions (LF-LFWFs) of 𝜌 and 𝐽 /𝜓 from our recent study, and supplement with Υ's LF-LFWFs. These LF-LFWFs are extracted from dynamically solved Bethe-Salpeter wave functions. The vector meson TMDs are then studied with the light front overlap representation at leading Fock-state. All the obtained TMDs are non-vanishing and evolve with current quark mass, in particular the tensor polarized TMDs 𝑓 1𝐿𝑇 and 𝑓 1𝑇𝑇 which undergo a sign flip. The 𝜌 TMDs are compared with other model studies and agreement is found, aside from 𝑓 1𝐿𝑇 and 𝑓 1𝑇𝑇 . Finally, the collinear PDFs of vector mesons are studied. The 𝜌's valence PDFs 𝑓 1,𝑣 (𝑥) and 𝑔 1𝐿,𝑣 (𝑥) are evolved to the scale of 2.4 GeV, with their first three moments compared to lattice QCD prediction. The qualitative behavior of tensor polarized PDF 𝑓 1𝐿𝐿 (𝑥) in 𝜌 at large 𝑥 is also discussed.

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Section: Integrated Tmdsmentioning

confidence: 93%

Transverse momentum distributions of valence quark in light and heavy vector mesons

Shi,

Li,

et al. 2022

Preprint

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“…Refs. [57][58][59]). Different wave functions mostly affect the overall normalization of the J/ψ production cross section, and have a much smaller effect on the |t| spectra, which we are most interested here [43,55,57].…”

Section: Vector Meson Production At High Energymentioning

confidence: 99%

Bayesian inference of the fluctuating proton shape

Mäntysaari¹,

Schenke²,

Shen³

et al. 2022

Preprint

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Using Bayesian inference, we determine probabilistic constraints on the parameters describing the fluctuating structure of protons at high energy. We employ the color glass condensate framework supplemented with a model for the spatial structure of the proton, along with experimental data from the ZEUS and H1 Collaborations on coherent and incoherent diffractive J/ψ production in e+p collisions at HERA. This data is found to constrain most model parameters well. This work sets the stage for future global analyses, including experimental data from e+p, p+p, and p+A collisions, to constrain the fluctuating structure of nucleons along with properties of the final state.

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“…in Refs. [55][56][57]. Using other wave function models mostly affects the overall normalization of the cross section and has only a minor effect on the shape of the t spectra, which is the main focus of this work.…”

Section: Vector Meson Production At High Energymentioning

confidence: 99%

Nuclear geometry at high energy from exclusive vector meson production

Mäntysaari¹,

Salazar²,

Schenke³

2022

Preprint

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We show that when saturation effects are included one obtains a good description of the exclusive J/ψ production spectra in ultra peripheral lead-lead collisions as recently measured by the ALICE Collaboration at the LHC. As exclusive spectra are sensitive to the spatial distribution of nuclear matter at small Bjorken-x, this implies that gluon saturation effects modify the impact parameter profile of the target as we move towards small x. In addition to saturation effects, we find a preference for larger nuclear strong-interaction radii compared to the typical charge radius. We demonstrate the role of finite photon transverse momentum and the interference between the cases for which the role of photon emitter and target are switched between the nuclei. We show that these effects are comparable to the experimental precision for pT -differential cross sections and as such need to be included when comparing to LHC data. Finally, the integrated J/ψ production cross sections from the LHC and preliminary transverse momentum spectra from RHIC are shown to prefer calculations with fluctuating nucleon substructure, although these datasets would require even stronger saturation effects than predicted from our framework.

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Light-front wavefunctions of mesons by design

Cited by 3 publications

References 80 publications

Transverse momentum distributions of valence quark in light and heavy vector mesons

Transverse momentum distributions of valence quark in light and heavy vector mesons

Bayesian inference of the fluctuating proton shape

Nuclear geometry at high energy from exclusive vector meson production

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