Evidence for pi-K -atoms with DIRAC

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dc.contributor.affiliationUniversidade de Santiago de Compostela. Departamento de Física de Partículas
dc.contributor.authorDIRAC Collaboration
dc.contributor.authorAdeva Andany, Bernardo
dc.contributor.authorLópez Aguera, María de los Ángeles
dc.contributor.authorPló Casasús, Máximo
dc.contributor.authorRomero Vidal, Antonio
dc.contributor.authorSaborido Silva, Juan José
dc.contributor.authorZrelov, P.
dc.date.accessioned2025-01-29T13:00:21Z
dc.date.available2025-01-29T13:00:21Z
dc.date.issued2009-04-06
dc.description.abstractWe present evidence for the first observation of electromagnetically bound π±K∓-pairs (πK-atoms) with the DIRAC experiment at the CERN-PS. The πK-atoms are produced by the 24 GeV/c proton beam in a thin Pt-target and the π± and K∓-mesons from the atom dissociation are analyzed in a twoarm magnetic spectrometer. The observed enhancement at low relative momentum corresponds to the production of 173 ± 54 πK-atoms. The mean life of πK-atoms is related to the s-wave πK-scattering lengths, the measurement of which is the goal of the experiment. From these first data we derive a lower limit for the mean life of 0.8 fs at 90% confidence level.
dc.description.peerreviewedSI
dc.identifier.citationPhysics Letters B Volume 674, Issue 1, 6 April 2009, Pages 11-16
dc.identifier.doi10.1016/j.physletb.2009.03.001
dc.identifier.issn0370-2693
dc.identifier.urihttps://hdl.handle.net/10347/39263
dc.journal.titlePhysics Letters B
dc.language.isoeng
dc.page.final16
dc.page.initial11
dc.publisherElsevier
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.physletb.2009.03.001
dc.rightsAttribution 4.0 Internationalen
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectDIRAC experiment
dc.subjectExotic atoms
dc.subjectScattering leng
dc.subjectπK-scatteringth
dc.subjectChiral perturbation
dc.subject.classification220703 Física atómica
dc.titleEvidence for pi-K -atoms with DIRAC
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number674
dspace.entity.typePublication
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relation.isAuthorOfPublication396263ef-5d7e-4436-83b1-79b8b505f8f0
relation.isAuthorOfPublication51ec11e3-763c-43f2-8647-e331536230dc
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relation.isAuthorOfPublication.latestForDiscoveryc0bf8e93-cff6-4c10-95f7-806157924d8c

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