Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-01-06
Phys.Rev.D79:055016,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
v2: 25 pages, 7 figures. Typos fixed, clarifications added, presentation of plots improved, title slightly changed. To be publ
Scientific paper
10.1103/PhysRevD.79.055016
We study in an effective operator approach how the effects of new physics from various scenarios that contain an extra $Z'$ neutral gauge boson or doubly charged scalars, can affect and thus be tested by the precision polarized M\o{}ller scattering experiments. We give Wilson coefficients for various classes of generic models, and we deduce constraints on the parameter space of the relevant coupling constants or mixing angles from the results of the SLAC E158 experiment where applicable. We give also constraints projected from the upcoming 1 ppb JLAB experiment. In the scenario where the extra $Z'$ is light ($M_{Z'} \ll M_W$), we obtain further constraints on the parameter space using the BNL $g-2$ result where it is useful. We find that the BNL deviation from the Standard Model cannot be attributed to a light extra $Z'$ neutral gauge boson.
Chang We-Fu
Ng John N.
Wu Jackson M. S.
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