Small-angle Bhabha scattering data recorded at the Z resonance and large-angle Bhabha scattering data recorded at root s = 189 GeV by the L3 detector at LEP are used to measure the running of the effective fine-structure constant for spacelike momentum transfers. The results are alpha(-1)(- 2.1 GeV(2)) -alpha(-1)(-6.25 GeV(2)) = 0.78 +/- 0.26 alpha(-1)(- 12.25 GeV(2)) -alpha-(1)(- 3434 GeV(2)) = 3.80 +/- 1.29, in agreement with theoretical predictions. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

Measurement of the running of the fine-structure constant / Acciarri, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M.g., Ambrosi, G., Anderhub, H., Andreev, V.p., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Baksay, L., Balandras, A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 476:(2000), pp. 40-48. [10.1016/S0370-2693(00)00122-2]

Measurement of the running of the fine-structure constant

BAGNAIA, Paolo;BARONE, Luciano Maria;FACCINI R;FERRONI, Fernando;GENTILE, Simonetta;GIAGU, Stefano;LUCI, Claudio;ORGANTINI, Giovanni;PARAMATTI, Riccardo;
2000

Abstract

Small-angle Bhabha scattering data recorded at the Z resonance and large-angle Bhabha scattering data recorded at root s = 189 GeV by the L3 detector at LEP are used to measure the running of the effective fine-structure constant for spacelike momentum transfers. The results are alpha(-1)(- 2.1 GeV(2)) -alpha(-1)(-6.25 GeV(2)) = 0.78 +/- 0.26 alpha(-1)(- 12.25 GeV(2)) -alpha-(1)(- 3434 GeV(2)) = 3.80 +/- 1.29, in agreement with theoretical predictions. (C) 2000 Published by Elsevier Science B.V. All rights reserved.
2000
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the running of the fine-structure constant / Acciarri, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M.g., Ambrosi, G., Anderhub, H., Andreev, V.p., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Baksay, L., Balandras, A., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 476:(2000), pp. 40-48. [10.1016/S0370-2693(00)00122-2]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/249404
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