The Q-weak Experiment: Implications from the First Determination of the Proton's Weak Charge

$Q_{weak}$ part 3: The $Q_{weak}$ experiment recently completed data taking at Jefferson Laboratory with the aim of making the first experimental determination of the proton's weak charge, the neutral-weak analog of the electric charge. Results have been obtained from the first period of data-taking, which comprises 3 days of beam and 4\% of the total data set. The experiment measured the small parity-violating asymmetry of elastic electron-proton scattering, which allows direct extraction of $Q_W^p$. Once extracted, the current results directly probe potential new parity-violating semi-leptonic physics beyond the Standard Model at the $TeV$ scale. For the general 4-fermion contact interaction, the probed mass-limit is ~1.1 $TeV$ with 95\% confidence. When combined with the world's parity-violating data, extraction of the neutron's neutral-weak charge, $Q_n^p$, and the individual quark weak vector couplings, $C_{1u}$ and $C_{1d}$, are also possible. This talk will focus on the implications of the current $Q_{weak}$ experimental results, including the extraction of the proton and neutron weak charges, the quark weak couplings, and also highlight the mass-limit reach of Standard Model extensions probed. Projections to the final $Q_{weak}$ dataset will be provided.