Double-box contributions to Møller scattering in the Standard Model

The paper investigates contributions of γ , Z , W and ghost intermediate states of box-type to the parity-violating Møller scattering asymmetry up to two-loop level. Using the Yennie–Frautschi–Suura factorization form for amplitudes, we demonstrate that QED corrections, with an exception of vacuum-p...

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Veröffentlicht in:	The European physical journal. C, Particles and fields Particles and fields, 2012-12, Vol.72 (12), p.1-21, Article 2249
Hauptverfasser:	Aleksejevs, A. G., Barkanova, S. G., Bystritskiy, Y. M., Ilyichev, A. N., Kuraev, E. A., Zykunov, V. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Amplitudes Astronomy Astrophysics and Cosmology Asymmetry Boxes Elementary Particles Hadrons Heavy Ions Measurement Science and Instrumentation Nuclear Energy Nuclear Physics Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Regular Article - Theoretical Physics Scattering String Theory
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Beschreibung
Zusammenfassung:	The paper investigates contributions of γ , Z , W and ghost intermediate states of box-type to the parity-violating Møller scattering asymmetry up to two-loop level. Using the Yennie–Frautschi–Suura factorization form for amplitudes, we demonstrate that QED corrections, with an exception of vacuum-polarization effects, cancel at the asymmetry level. We obtain chiral amplitudes at Born, one-loop and partially at two-loop level: ladder boxes and decorated boxes. Our calculations are relevant for the ultra-precise 11 GeV MØLLER experiment planned at Jefferson Laboratory. The numerical comparison of the two-loop contributions with the experimental accuracy of MØLLER is provided.
ISSN:	1434-6044 1434-6052
DOI:	10.1140/epjc/s10052-012-2249-x