Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-03-04
Phys.Rev. D68 (2003) 035008
Physics
High Energy Physics
High Energy Physics - Phenomenology
Extended version of hep-ph/0205183 containing full details of the calculation and analysis. 30 pages, 10 figures
Scientific paper
10.1103/PhysRevD.68.035008
We compute the one-loop supersymmetric (SUSY) contributions to the weak charges of the electron ($Q_W^e$), proton ($Q_W^p$), and cesium nucleus ($Q_W^{\rm Cs}$) in the Minimal Supersymmetric Standard Model (MSSM). Such contributions can generate several percent corrections to the corresponding Standard Model values. The magnitudes of the SUSY loop corrections to $Q_W^e$ and $Q_W^p$ are correlated over nearly all of the MSSM parameter space and result in an increase in the magnitudes of these weak charges. In contrast, the effects on $Q_W^{\rm Cs}$ are considerably smaller and are equally likely to increase or decrease its magnitude. Allowing for R-parity violation can lead to opposite sign relative shifts in $Q_W^e$ and $Q_W^p$, normalized to the corresponding Standard Model values. A comparison of $Q_W^p$ and $Q_W^e$ measurements could help distinguish between different SUSY scenarios.
Kurylov Andriy
Ramsey-Musolf Michael. J.
Su Shangguo
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