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Measurement of the running of the fine-structure constant

CollaborationWith : Achard, Pablo / Ambrosi, Giovanni / Bourquin, Maurice / Braccini, Saverio / Chamizo Llatas, Maria / Deglon, Patrick / Delmeire, Evelyne / Extermann, Pierre / Field, John / Kienzle, Maria-Novella / Muheim, Franz / Pohl, Martin / Produit, Nicolas / Sciarrino, Deborah
Published in Physics Letters. B. 2000, vol. 476, no. 1-2, p. 40-48
Abstract Small-angle Bhabha scattering data recorded at the Z resonance and large-angle Bhabha scattering data recorded at √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 α-1(-2.1 GeV2)-α-1(-6.25 GeV2)=0.78±0.26 ; α-1(-12.25 GeV2)-α-1(-3434 GeV2)=03.80±1.29 in agreement with theoretical predictions.
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L3 COLLABORATION. Measurement of the running of the fine-structure constant. In: Physics Letters. B, 2000, vol. 476, n° 1-2, p. 40-48. https://archive-ouverte.unige.ch/unige:47332

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Deposited on : 2015-02-27

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