Acciarri, M. ; Achard, P. ; Adriani, O. ; Gurtu, A. ; et., al (2001) Light resonances in K0SK±π± and ηπ+π- final states in γγ collisions at LEP Physics Letters B, 501 (1-2). pp. 1-11. ISSN 0370-2693
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S0370-2693(01)00102-2
Abstract
The e+e−→e+e-K0SK±π± and e+e−→e+e−ηπ +π- final states are studied with the L3 detector at LEP using data collected at centre-of-mass energies from 183 GeV up to 202 GeV. The mass spectrum of the K0SK±π± final state shows an enhancement around 1470 MeV, which is identified with the pseudoscalar meson η(1440). This state is observed in γγ collisions for the first time and its two-photon width is measured to be Γγγ(η(1440)) × BR(η(1440) → KK̅π) = 212±50(stat.)±23 (sys.) eV. Clear evidence is also obtained for the formation of the axial vector mesons f1(1420) and f1(1285). In the ηπ +π- channel the f1(1285) is observed, and upper limits for the formation of η(1440) and η(1295) are obtained.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
ID Code: | 83417 |
Deposited On: | 21 Feb 2012 07:33 |
Last Modified: | 21 Feb 2012 07:33 |
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