Abstract
Ladder diagrams are relevant for the study of bound states. The condition on the coupling strength for the existence of a bound state has been deduced in a scalar field theory for the case of low mass exchanges. We apply this approach to the case of very high mass exchanges.
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03.65.Nk; 03.70.+k; 11.10.St
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De Leo, S., Rotelli, P. Bound state inequality for high mass exchanges in a scalar field model. Eur. Phys. J. C 53, 659–666 (2008). https://doi.org/10.1140/epjc/s10052-007-0497-y
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DOI: https://doi.org/10.1140/epjc/s10052-007-0497-y