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

Measurement of the running of the fine-structure constant

ADRIANI, OSCAR;BECATTINI, FRANCESCO;D'ALESSANDRO, RAFFAELLO;
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
476
40
48
M. Acciarri;P. Achard;O. Adriani;M. Aguilar-Benitez;J. Alcaraz;G. Alemanni;J. Allaby;A. Aloisio;M. G. Alviggi;G. Ambrosi;H. Anderhub;V. P. ...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/774927
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