Tree amplitudes at multiparticle threshold in a model with softly broken $O(2)$ symmetry

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dc.creatorLibanov, M. V.
dc.creatorRubakov, V. A.
dc.creatorTroitsky, S. V.
dc.date1993-07-02
dc.date.accessioned2026-07-07T11:47:41Z
dc.date.available2026-07-07T11:47:41Z
dc.descriptionTree amplitudes of the production of two kinds of scalar particles at threshold from one virtual particle are calculated in a model of two scalar fields with $O(2)$ symmetric quartic interaction and unequal masses. These amplitudes exhibit interesting factorial and exponential behaviour at large multiplicities. As a by-product we observe that the kinematically allowed decay of one real particle into $n$ real particles of another kind, all at rest, has zero tree amplitude in this model for $n>2$.
dc.description17 pages. Preprint INR-823/93
dc.identifierhttps://arxiv.org/abs/hep-ph/9307213
dc.identifierhttp://arxiv.org/abs/hep-ph/9307213
dc.identifierNucl.Phys.B412:607-620,1994
dc.identifierdoi:10.1016/0550-3213(94)90394-8
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/202658
dc.subjectHigh Energy Physics - Phenomenology
dc.titleTree amplitudes at multiparticle threshold in a model with softly broken $O(2)$ symmetry
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