Undergraduate Research at Jefferson Lab

Projection Study for SoLID PVDIS Proton Program: Examining d_V/u_V and Its Uncertainty

Student: George Evans

School: Brigham Young University-Idaho

Mentored By: Douglas Higinbotham and Xiaochao Zheng

A new detector, SoLID (Solenoidal Large Intensity Device), is expected to be capable of measuring parity violation (PV) in deep-inelastic scattering when completed, the data from which can be used to obtain d_V/d_V. The uncertainty projections in the design of SoLID regarding d_V/d_V  have been updated in this study, then expanded from using an 11 GeV beam energy to a 22 GeV beam energy. We generated asymmetry pseudo-data A_{PV pseudo}  over a range of Q²  and Björken scaling variable x to simulate SoLID proton measurements. d_Vd_V  was then extracted from A_{PV pseudo}  using a simplified equation for A_PV. Uncertainties due to A_PV  (statistical and systematic), due to using an experimentally derived weak mixing angle, and from our model were calculated for d_V/d_V. These findings will aid experimenters in refining the design and implementation of SoLID as well as strengthening the extraction of d_V/d_V  when data are obtained. Overall, these findings will help with the search to understand the internal structure of protons.

[Watch the presentation on YouTube]