Abstract
We discuss precision measurements of PVDIS with the upgraded JLab 12 GeV beam by using a Solenoidal Łarge Iintensity Device (SoLID). The unique feature of SoLID, combining high luminosity and large acceptance, makes it possible to reach the high precision needed to have a high impact by using PVDIS to probe physics beyond the Standard Model. A measurement of PVDIS in deuterium will determine a fundamental coupling constant that is inaccessible with other means. PVDIS measurements can also access a number of topics in QCD physics, including searching for charge symmetry violation in the parton distribution functions, determining the [Formula: see text] ratio in the proton without nuclear effects, and a clean extraction of higher-twist effects due to quark-quark correlations. SoLID allows a full exploitation of the physics potential of the JLab 12 GeV upgrade. In addition to PVDIS, it has a set of approved highly-rated experiments to study nucleon transverse spin and transverse structure by using polarized semi-inclusive DIS and to study non-perturbative gluon dynamics with J/[Formula: see text] production near threshold. A brief description of the SoLID spectrometer is also given.
Highlights
In the late 70’s, Prescott et al.[1, 2] showed, by measuring the non-zero asymmetry ALR =/(σL + σR) for polarized electron-deuterium deep inelastic scattering, that the weak neutral current violates parity
The experiment set limits on the dependence of ALR on the variable y ≡ (E − E )/E, which ruled out models invented to explain the negative results of the early atom parity violation (APV) experiments
Parity violating electron scattering (PVES) from deuterium in the DIS region at large Bjorken x is an attractive reaction for searching for new physics since there the ALR is approximately independent of hadron structure
Summary
The experiment set limits on the dependence of ALR on the variable y ≡ (E − E )/E, which ruled out models invented to explain the negative results of the early atom parity violation (APV) experiments. Subsequent to these publications, Glashow, Salam, and Weinberg were awarded the Nobel prize for electroweak unification. This is an Open Access article published by World Scientific Publishing Company. Further distribution of this work is permitted, provided the original work is properly cited
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