par Abreu, Pedro;Lemonne, Jacques 
;Van Lysebetten, Ann;Verbeure, F;Wickens, John H. ;Bertrand, Daniel ;Deghorain, A.;De Brabandere, S.;De Clercq, Catherine;Herquet, P. ;Hoorelbeke, S.;Huet, Kathy;Lefebure, Véronique ; [et al.]
Référence Physics letters. Section B, 441, 1-4, page (479-490)
Publication Publié, 1998-11
;Van Lysebetten, Ann;Verbeure, F;Wickens, John H. ;Bertrand, Daniel ;Deghorain, A.;De Brabandere, S.;De Clercq, Catherine;Herquet, P. ;Hoorelbeke, S.;Huet, Kathy;Lefebure, Véronique ; [et al.]Référence Physics letters. Section B, 441, 1-4, page (479-490)
Publication Publié, 1998-11
Article révisé par les pairs
| Résumé : | A search for the production of the η′c meson, the first radial excitation of the ground state of charmonium ηc(2980), in the photon-photon fusion reaction at LEP has been performed using the data collected by the DELPHI detector during 1992-1996. No evidence of η′c production is found in the mass region 3520-3800 MeV/c2. An upper limit for the ratio of the two-photon widths of the η′c and ηc is obtained. © 1998 Published by Elsevier Science B.V. All rights reserved. |
