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The ηc(2980) formation in two-photon collisions at LEP energies

Abstract:
ηc(2980) production in γγ interactions has been detected via its decays into Ks0K±π ∓, K+K-K+K- and K +K-π+π- in the data taken with the DELPHI detector at LEP1 and LEP2 energies. The two-photon radiative width averaged over all observed decay channels is Γγγ = 13.9 ± 2.0 (stat.) ± 1.4(syst.) ± 2.7 (BR) keV. No direct decay channel ηc → π+π -π+π- has been observed. An upper limit Γγγ < 5.5 keV at 95% confidence level has been evaluated for this decay mode.

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Publisher copy:
10.1140/epjc/s2003-01384-0

Authors


Abdallah, J More by this author
Albrecht, T More by this author
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Journal:
European Physical Journal C
Volume:
31
Issue:
4
Pages:
481-489
Publication date:
2003-12-05
DOI:
ISSN:
1434-6044
URN:
uuid:3ac550ba-e576-4fc9-96ed-483008c8ad52
Source identifiers:
281841
Local pid:
pubs:281841
Language:
English

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