Form factors of η c in light-front quark model

2013/07/15 by Chao-Qiang Geng, Chong-Chung Lih
Physics and Astronomy · #B meson #Form factor (electronics) #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Meson #Momentum transfer #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Quark model #Quarkonium #Scattering #hep-ex #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-013-2505-8

published as Eur. Phys. J. C73, 2505 (2013) · 9 pages, 3 figures, accepted for publication in EPJC

arxiv created 2013/07/15 · openalex publication_date 2013/07/31 · arxiv updated 2013/08/02 · openalex created_date 2016/08/23 · openalex updated_date 2026/08/05

Abstract

We study the form factors of the η_c meson in the light-front quark model. We explicitly show that the transition form factor of η_c → γ^* γ as a function of the momentum transfer is consistent with the experimental data by the BaBar collaboration, while the decay constant of η_c is found to be f_η_c=230.5^+52.2_-61.0 and 303.6^+115.2_-116.4 MeV for η_c∼ cc by using two η_c → γγ decay widths of 5.3± 0.5 and 7.2±2.1 keV, given by Particle Data Group and Lattice QCD calculation, respectively.

Citations

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