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 / D. Buskulic, I. DeBonis, D. Decamp, P. Ghez, C. Goy, J. P. Lees, A. Lucotte, M. N. Minard, P. Odier, B. Pietrzyk, M. P. Casado, M. Chmeissani, J. M. Crespo, M. Delfino, I. Efthymiopoulos, E. Fernandez, M. FernandezBosman, L. Garrido, A. Juste, M. Martinez, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 384:(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

FOCARDI, ETTORE;CIULLI, VITALIANO;
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
384
333
342
D. Buskulic;I. DeBonis;D. Decamp;P. Ghez;C. Goy;J. P. Lees;A. Lucotte;M. N. Minard;P. Odier;B. Pietrzyk;M. P. Casado;M. Chmeissani;J. M. ...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/772442
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