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Study of resonance formation in the mass region 1400−1500MeV through the reaction γγ→K0SK±π∓

Document type: Articulo

Abstract

The K0SK±π∓ final state in two-photon collisions is studied with the L3 detector at LEP at e+e− centre-of-mass energies from 183 to 209 GeV with an integrated luminosity of 664.6 pb−1. The η (1475) and f1(1420) mesons are observed and their contribution is separated by measuring the formation rates as a function of the photon virtuality Q2. The η (1475) is found to be dominant for Q2 ≤ 0.01 GeV2 and its two-photon width is measured to be 0.23±0.05 (stat.) ±0.05 (sys.) keV. At higher Q2, the f−1(1420) is formed and decays to K*(892)K. The γγ coupling and form factor parameters of this state are measured to be Γγγ = 3.2 ± 0.6 (stat.) ± 0.7 (sys.) keV and Λ1 = 926 ± 72 (stat.) ± 32 (sys.) MeV, respectively.

General information

Issue date: 6 de marzo de 2007
Document language: English
Journal: Journal of High Energy Physics; vol. 2007, no. 3
Origin: Facultad de Ciencias Exactas
ISSN: 1029-8479
xmlui.dri2xhtml.METS-1.0.item-dc-subject: large electron positron collider ; Resonancia ; Fotones
Subjects: Ciencias Exactas ; Física

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Created: 20 de septiembre de 2019
Available since: 20 de septiembre de 2019
Please, use one of this identificators(URI) for cite o linking this item:
  • http://sedici.unlp.edu.ar/handle/10915/81664
  • https://doi.org/10.1088/1126-6708/2007/03/018

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    Creative Commons Attribution 4.0 International (CC BY 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution 4.0 International (CC BY 4.0)