A study of twelve distinct decay channels of the eta(c) has been performed with the L3 detector at LEP, for an integrated luminosity of 30 pb-1. Summing all channels, 28 candidate events have been identified, with an estimated background of 11 events. The two-photon radiative width is evaluated to be GAMMA(gammagamma) (eta(c)) = 8.0 +/- 2.3 +/- 2.4 keV.

Measurement of Eta(c) Production In Untagged 2-photon Collisions At Lep / Adriani, O., Aguilarbenitz, M., Ahlen, S., Alcaraz, J., Aloisio, A., Alverson, G., Alviggi, M., Ambrosi, G., An, Q., Anderhub, H., Anderson, A.L., Andreev, V.P., Angelescu, T., Antonov, L., Antreasyan, D., Arce, P., Arefiev, A., Atamanchuk, A., Azemoon, T., Aziz, T., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 318:(1993), pp. 575-582. [10.1016/0370-2693(93)91558-5]

Measurement of Eta(c) Production In Untagged 2-photon Collisions At Lep

ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CHIEFARI, GIOVANNI;L. LISTA;MEROLA, LEONARDO;NAPOLITANO, MARCO;PATRICELLI, SERGIO;SCIACCA, CRISOSTOMO;
1993

Abstract

A study of twelve distinct decay channels of the eta(c) has been performed with the L3 detector at LEP, for an integrated luminosity of 30 pb-1. Summing all channels, 28 candidate events have been identified, with an estimated background of 11 events. The two-photon radiative width is evaluated to be GAMMA(gammagamma) (eta(c)) = 8.0 +/- 2.3 +/- 2.4 keV.
1993
Measurement of Eta(c) Production In Untagged 2-photon Collisions At Lep / Adriani, O., Aguilarbenitz, M., Ahlen, S., Alcaraz, J., Aloisio, A., Alverson, G., Alviggi, M., Ambrosi, G., An, Q., Anderhub, H., Anderson, A.L., Andreev, V.P., Angelescu, T., Antonov, L., Antreasyan, D., Arce, P., Arefiev, A., Atamanchuk, A., Azemoon, T., Aziz, T., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 318:(1993), pp. 575-582. [10.1016/0370-2693(93)91558-5]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/481276
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