A search for the pseudoscalar meson eta(b) is performed in two-photon interactions at LEP 2 with an integrated luminosity of 699 pb(-1) collected at e(+)e(-) centre-of-mass energies from 181 GeV to 209 GeV. One candidate event is found in the six-charged-particle final state and none in the four-charged-particle final state, in agreement with the total expected background of about one event. Upper limits of Gamma(gammagamma)(eta(b)) x BR(eta(b) --> 4 charged particles) < 48 eV, Gamma(gammagamma) (eta(b)) x BR(eta(b) --> 6 charged particles) < 132 eV are obtained at 95% confidence level, which correspond to upper limits of 9.0% and 25% on these branching ratios. (C) 2002 Elsevier Science B.V. All rights reserved.

Search for gamma gamma -> eta(b) in e(+)e(-) collisions at LEP 2 / Schael, A., Heister, S., Barate, R., Brunelière, R., De Bonis, I., Decamp, D., Goy, C., Jezequel, S., Lees, J.P., Martin, F., Merle, E., Minard, M.N., Trocmé, ., B., P., Boix, G., Bravo, S., Casado, M.P., Chmeissani, M., Crespo, J.M., Fernandez, E., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 530:1-4(2002), pp. 56-66. [10.1016/S0370-2693(02)01329-1]

Search for gamma gamma -> eta(b) in e(+)e(-) collisions at LEP 2

Creanza, D. M.;De Filippis, N.;Iaselli, Giuseppe;Nuzzo, S.;
2002

Abstract

A search for the pseudoscalar meson eta(b) is performed in two-photon interactions at LEP 2 with an integrated luminosity of 699 pb(-1) collected at e(+)e(-) centre-of-mass energies from 181 GeV to 209 GeV. One candidate event is found in the six-charged-particle final state and none in the four-charged-particle final state, in agreement with the total expected background of about one event. Upper limits of Gamma(gammagamma)(eta(b)) x BR(eta(b) --> 4 charged particles) < 48 eV, Gamma(gammagamma) (eta(b)) x BR(eta(b) --> 6 charged particles) < 132 eV are obtained at 95% confidence level, which correspond to upper limits of 9.0% and 25% on these branching ratios. (C) 2002 Elsevier Science B.V. All rights reserved.
2002
https://www.sciencedirect.com/science/article/abs/pii/S0370269302013291?via%3Dihub
Search for gamma gamma -> eta(b) in e(+)e(-) collisions at LEP 2 / Schael, A., Heister, S., Barate, R., Brunelière, R., De Bonis, I., Decamp, D., Goy, C., Jezequel, S., Lees, J.P., Martin, F., Merle, E., Minard, M.N., Trocmé, ., B., P., Boix, G., Bravo, S., Casado, M.P., Chmeissani, M., Crespo, J.M., Fernandez, E., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 530:1-4(2002), pp. 56-66. [10.1016/S0370-2693(02)01329-1]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/5713
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