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Reevaluation of the hadronic vacuum polarisation contributions to the Standard Model predictions of the muon g-2 and α(mZ2) using newest hadronic cross-section data

Davier, M. ; Hoecker, A. ; Malaescu, B. ; Zhang, Z.

The European physical journal. C, Particles and fields, 2017-12, Vol.77 (12), p.1-12 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
Reevaluation of the hadronic vacuum polarisation contributions to the Standard Model predictions of the muon g-2 and α(mZ2) using newest hadronic cross-section data
Autor: Davier, M. ; Hoecker, A. ; Malaescu, B. ; Zhang, Z.
Assuntos: Astronomy ; Astrophysics and Cosmology ; Cross-sections ; Economic models ; Electromagnetic coupling ; Elementary Particles ; Hadrons ; Heavy Ions ; Magnetic anomalies ; Mathematical models ; Measurement Science and Instrumentation ; Nuclear Energy ; Nuclear Physics ; Physics ; Physics and Astronomy ; Polarization ; Quantum Field Theories ; Quantum Field Theory ; Quarks ; Regular Article - Theoretical Physics ; String Theory
É parte de: The European physical journal. C, Particles and fields, 2017-12, Vol.77 (12), p.1-12
Descrição: We reevaluate the hadronic vacuum polarisation contributions to the muon magnetic anomaly and to the running of the electromagnetic coupling constant at the Z -boson mass. We include newest e + e - → hadrons cross-section data (among others) from the BABAR and VEPP-2000 experiments. For the muon ( g - 2 ) / 2 we find for the lowest-order hadronic contribution ( 693.1 ± 3.4 ) × 10 - 10 , improving the precision of our previous evaluation by 21%. The full Standard Model prediction differs by 3.5 σ from the experimental value. The five-quark hadronic contribution to α ( m Z 2 ) is evaluated to be ( 276.0 ± 0.9 ) × 10 - 4 .
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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Reevaluation of the hadronic vacuum polarisation contributions to the Standard Model predictions of the muon g-2 and α(mZ2) using newest hadronic cross-section data

Davier, M. ; Hoecker, A. ; Malaescu, B. ; Zhang, Z.

Berlin/Heidelberg: Springer Berlin Heidelberg

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