Abstract.
In the Wick-Cutkosky model we analyze nonperturbatively, in light-front dynamics, the contributions of two-body and higher Fock sectors to the total norm and electromagnetic form factor. It turns out that two- and three-body sectors always dominate. For a maximal value of the coupling constant α = 2π, corresponding to the zero bound-state mass M = 0, they contribute 90% to the norm. With decrease of α the two-body contribution increases up to 100%. The form factor asymptotic is always determined by a two-body sector.
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Karmanov, V., Hwang, D. Higher Fock Sectors in the Wick-Cutkosky Model. Few-Body Systems 36, 155–159 (2005). https://doi.org/10.1007/s00601-004-0093-8
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DOI: https://doi.org/10.1007/s00601-004-0093-8