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arXiv · 2306.04704

Signals of strong parity violation in deep inelastic scattering

Alessandro Bacchetta·Matteo Cerutti·Ludovico Manna·Marco Radici·Xiaochao Zheng
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Abstract

We include strong parity-violating contributions to inclusive deep inelastic scattering (DIS) of longitudinally polarized leptons off an unpolarized target. At variance with standard results, we obtain nonvanishing parity-violating structure functions in the case of pure photon exchange. The addition of these strong parity-violating contributions improves the description of existing experimental data on DIS parity-violating asymmetries. We find the size of these contributions small but exhibiting a deviation from zero of about 1.5 $\sigma$. The associated $p$-value is 0.063, indicating that the probability of making an error by rejecting the hypothesis of no parity-violating contributions is 6.3\%, which is small but not negligible. Further improvement on the limit of the strong parity-violation can be expected from the future SoLID program at Jefferson Lab.

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Alessandro Bacchetta, Matteo Cerutti, Ludovico Manna, Marco Radici, Xiaochao Zheng. 2023-06-07. Signals of strong parity violation in deep inelastic scattering. https://arxiv.org/abs/2306.04704

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