Rescattering Effect and Near Threshold Enhancement of $p\bar p$ System

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dc.creatorChen, G. Y.
dc.creatorDong, H. R.
dc.creatorMa, J. P.
dc.date2008-06-28
dc.date.accessioned2026-07-07T11:52:06Z
dc.date.available2026-07-07T11:52:06Z
dc.descriptionWe study the observed enhancement of a $p\bar p$ system near the threshold in the process $J/ψ\to γp\bar p$ and $e^+ e^- \to p\bar p$. From early studies the enhancement can be explained by final state interactions, which are in general taken into account with some potential models. In this work we offer a simple approach within quantum field theory to explain the observed enhancement. We point out that among different final state interactions the rescattering in a $N\bar N$ system though exchange of $π$ is the most important. The effects of the rescattering is completely fixed by the well-known coupling $g_{πNN}$. Our results show that the enhancement in $J/ψ\to γp\bar p$ and $e^+ e^- \to p\bar p$ can be well described with the rescattering effects.
dc.description11 pages with 4 figures
dc.identifierhttps://arxiv.org/abs/0806.4661
dc.identifierhttp://arxiv.org/abs/0806.4661
dc.identifierPhys.Rev.D78:054022,2008
dc.identifierdoi:10.1103/PhysRevD.78.054022
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204117
dc.subjectHigh Energy Physics - Phenomenology
dc.titleRescattering Effect and Near Threshold Enhancement of $p\bar p$ System
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