The production of final states involving one or more energetic photons from e(+)e(-) collisions at high energies is studied using data collected by the ALEPH detector at LEP. The data consist of two samples of 2.9 pb(-1) each, recorded at centre-of-mass energies of 130 GeV and 136 GeV. The data are in agreement with the predictions of the Standard Model. From an analysis of two-photon final states new limits are placed on the parameters of models involving e(+)e(-)gamma gamma contact interactions and excited electrons. The 95% confidence level lower limits on the QED cut-off parameters Lambda(+) and Lambda(-) are found to be 169 and 132 GeV respectively.

A study of single and multi-photon production in e(+)e(-) collisions at centre-of-mass energies of 130 and 136 GeV / Buskulic, D., de Bonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.-P., Lucotte, A., Minard, M.-N., Odier, P., Pietrzyk, B., Casado, M.P., Chmeissani, M., Crespo, J.M., Delfino, M., Efthymiopoulos, I., Fernandez, E., Fernandez-Bosman, M., Garrido, Ll., Juste, A., Martinez, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 384:1-4(1996), pp. 333-342. [10.1016/0370-2693(96)00930-6]

A study of single and multi-photon production in e(+)e(-) collisions at centre-of-mass energies of 130 and 136 GeV

Creanza, D.;Iaselli, G.;Maggi, G.;Selvaggi, G.;Zito, Gabriele;Lin, J.;
1996

Abstract

The production of final states involving one or more energetic photons from e(+)e(-) collisions at high energies is studied using data collected by the ALEPH detector at LEP. The data consist of two samples of 2.9 pb(-1) each, recorded at centre-of-mass energies of 130 GeV and 136 GeV. The data are in agreement with the predictions of the Standard Model. From an analysis of two-photon final states new limits are placed on the parameters of models involving e(+)e(-)gamma gamma contact interactions and excited electrons. The 95% confidence level lower limits on the QED cut-off parameters Lambda(+) and Lambda(-) are found to be 169 and 132 GeV respectively.
1996
A study of single and multi-photon production in e(+)e(-) collisions at centre-of-mass energies of 130 and 136 GeV / Buskulic, D., de Bonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.-P., Lucotte, A., Minard, M.-N., Odier, P., Pietrzyk, B., Casado, M.P., Chmeissani, M., Crespo, J.M., Delfino, M., Efthymiopoulos, I., Fernandez, E., Fernandez-Bosman, M., Garrido, Ll., Juste, A., Martinez, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 384:1-4(1996), pp. 333-342. [10.1016/0370-2693(96)00930-6]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/3469
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