We evaluate the last missing piece of the two-loop QED corrections to the high-energy electron-positron scattering cross section originating from the vacuum polarization by heavy fermions. The calculation is performed within a new approach applicable to a wide class of perturbative problems with mass hierarchy. The result is crucial for the high-precision physics program at existing and future e(+)e(-) colliders.
Heavy-flavor contribution to Bhabha scattering / Bonciani, Roberto; A., Ferroglia; A. A., Penin. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 100:13(2008). [10.1103/physrevlett.100.131601]
Heavy-flavor contribution to Bhabha scattering
BONCIANI, ROBERTO;
2008
Abstract
We evaluate the last missing piece of the two-loop QED corrections to the high-energy electron-positron scattering cross section originating from the vacuum polarization by heavy fermions. The calculation is performed within a new approach applicable to a wide class of perturbative problems with mass hierarchy. The result is crucial for the high-precision physics program at existing and future e(+)e(-) colliders.File allegati a questo prodotto
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