2012/02/06 by R. D. Carlini, R. Carlini, Carlini, R. D. +197 · 1 citation
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #nucl-ex #physics.ins-det
paper · pdf · doi:10.48550/arxiv.1202.1255
Proposal to Jefferson Lab Program Advisory Committee, December 2007. 93 pages, 44 figures. Uploaded here so a permanent copy is available, and for other papers to use arXiv version as reference First four authors are the spokespersons
openalex publication_date 2012/02/06 · arxiv created 2012/02/07 · arxiv updated 2012/02/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We propose a new precision measurement of parity-violating electron scattering on the proton at very low Q2 and forward angles to challenge predictions of the Standard Model and search for new physics. A unique opportunity exists to carry out the first precision measurement of the proton's weak charge, QW =1 - 4sin2θW. A 2200 hour measurement of the parity violating asymmetry in elastic ep scattering at Q2=0.03 (GeV/c)2 employing 180 μA of 85% polarized beam on a 35 cm liquid Hydrogen target will determine the proton's weak charge with approximately 4% combined statistical and systematic errors. The Standard Model makes a firm prediction of QW, based on the running of the weak mixing angle from the Z0 pole down to low energies, corresponding to a 10 sigma effect in this experiment.