Eur. Phys. J. A (2007) 32: 531-532
https://doi.org/10.1140/epja/i2006-10429-5

PAVI 2006

The E158 experiment

University of Massachusetts, 01003, Amherst, MA, USA

^* e-mail: kkumar@physics.umass.edu

Received: 31 August 2006
Accepted: 18 March 2007
Published online: 11 July 2007

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.