Hadronic decays of the $J/ψ$ meson

Mangoni, Alessio

doi:10.48550/arxiv.2002.09675

Cited by 1 publication

(1 citation statement)

References 72 publications

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“…The radial wave function at zero can be estimated from the decay of φ → l + l − as is usually done for J/ψ(c c), see e.g. [34]…”

Section: Sketch Of the Formalismmentioning

confidence: 99%

Two-gluon production of $ϕ$ and $η'$ mesons in proton-proton collisions at high energies

Cisek,

Szczurek

2021

Preprint

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We discuss gluon-gluon mechanisms for production of mesons with hidden strangeness, such as η ′ and φ meson, in proton-proton collisions at large energies. The g * g * → η ′ and g * g * → φg mechanisms are considered only and the corresponding cross sections are calculated in the k t -factorization approach. The F γ * γ * →η ′ and F g * g * →η ′ form factors are calculated from quarkantiquark η ′ light-cone wave function including quark/antiquark transverse momenta. The result for two-photon transition form factor demonstrates that higher twists may survive even to large photon virtualities. The result is compared with the result of a recent leading-twist NLO analysis which uses phenomenological distribution amplitudes fitted to exclusive production of η ′ in e + e − → e + e − η ′ reaction. We calculate transverse momentum distributions of both η ′ and φ mesons in proton-proton collisions for RHIC and LHC energies. The results are compared to experimental data whenever available. The results of the Lund string model are shown for comparison for η ′ production at LHC energies. It seems that the two-gluon fusion is not the dominant mechanism for both φ and η ′ production, although the situation for η ′ , especially at larger energies, is less clear due to lack of experimental data.

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“…The radial wave function at zero can be estimated from the decay of φ → l + l − as is usually done for J/ψ(c c), see e.g. [34]…”

Section: Sketch Of the Formalismmentioning

confidence: 99%