Abstract.
We have carried out a precision measurement of the parity-violating asymmetry A PV in the scattering of longitudinally polarized electrons off electrons in a liquid-hydrogen target. The measurement was performed with the 50GeV beam line at SLAC. The final result with the full data set collected in three production runs is A PV = - 131±14 (stat) ±10 (syst) parts per billion. The result leads to new limits on possible contact interactions at the TeV scale. We discuss future prospects for more precise measurements.
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Kumar, K.S. The E158 experiment. Eur. Phys. J. A 32, 531–532 (2007). https://doi.org/10.1140/epja/i2006-10429-5
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DOI: https://doi.org/10.1140/epja/i2006-10429-5