Study of the $pd\to ^3\textrm{He} K^+K^-$ and $pd\to ^3\textrm{He} ϕ$ reactions close to threshold

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dc.creatorBellemann, F.
dc.creatorBerg, A.
dc.creatorBisplinghoff, J
dc.creatorBohlscheid, G.
dc.creatorErnst, J.
dc.creatorHenrich, C.
dc.creatorHinterberger, F.
dc.creatorIbald, R.
dc.creatorJahn, R.
dc.creatorJoosten, R.
dc.creatorKilian, K.
dc.creatorKozela, A.
dc.creatorMachner, H.
dc.creatorMagiera, A.
dc.creatorMunkel, J.
dc.creatorvon Neumann-Cosel, P.
dc.creatorvon Rossen, P.
dc.creatorSchnitker, H.
dc.creatorScho, K.
dc.creatorSmyrski, J.
dc.creatorToelle, R.
dc.creatorWilkin, C.
dc.date2006-08-28
dc.date.accessioned2026-07-07T11:59:59Z
dc.date.available2026-07-07T11:59:59Z
dc.descriptionTwo--kaon production in proton--deuteron collisions has been studied at three energies close to threshold using a calibrated magnetic spectrograph to measure the final $^3$He and a vertex detector to measure the $K^+K^-$ pair. Differential and total cross sections are presented for the production of $ϕ$--mesons, decaying through $ϕ\to K^+K^-$, as well as for prompt $K^+K^-$ production. The prompt production seems to follow phase space in both its differential distributions and in its energy dependence. The amplitude for the $pd\to ^3${He}$ ϕ$ reaction varies little for excess energies below 22 MeV and the value is consistent with that obtained from a threshold measurement. The angular distribution of the $K^+K^-$ decay pair shows that near threshold the $ϕ$--mesons are dominantly produced with polarization $m=0$ along the initial proton direction. No conclusive evidence for $f_0(980)$ production is found in the data.
dc.description13 figures
dc.identifierhttps://arxiv.org/abs/nucl-ex/0608047
dc.identifierhttp://arxiv.org/abs/nucl-ex/0608047
dc.identifierPhys.Rev.C75:015204,2007
dc.identifierdoi:10.1103/PhysRevC.75.015204
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206756
dc.subjectNuclear Experiment
dc.subjectHigh Energy Physics - Experiment
dc.subjectNuclear Theory
dc.titleStudy of the $pd\to ^3\textrm{He} K^+K^-$ and $pd\to ^3\textrm{He} ϕ$ reactions close to threshold
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