STI Publications - View Publication Form #16950

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Publication Information
Title Results on spin sum rules and polarizabilities at low $Q^2$
Abstract We report on recently published experimental results on spin sum rules, and particularly on the generalized spin polarizabilities $\gamma_0(Q^2)$ (for both the proton and neutron) and $\delta_{LT}(Q^2)$ (for the neutron). The data were taken at Jefferson Lab in Hall A by experiment E97110 (neutron) and in Hall B by experiments E03006 and E05111 (proton and deuteron, respectively). The experiments covered the very low $Q^2$ domain, down to $Q^2 \sim 0.02$ GeV$^2$. This is well into the domain where Chiral Effective Field Theory ($\chi$EFT) predictions should be valid. While some obervables agree with the state-of-the-art $\chi$EFT predictions, others are in tensions, including $\delta_{LT}^n(Q^2)$ for which $\chi$EFT prediction was expected to be robust. This suggests that $\chi$EFT does not yet consistently describe nucleon spin observables, even at the very low $Q^2$ covered by the experiments.
Author(s) Alexandre Deur
Publication Date To Appear in 2022
Document Type Meeting
Primary Institution Thomas Jefferson National Accelerator Facility, Newport News
Affiliation Exp Nuclear Physics / Experimental Halls / Hall D
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Literature Review and Summary
Document Numbers
JLAB Number: JLAB-PHY-22-3570 OSTI Number:
LANL Number: arXiv:2202.10511 Other Number: DOE/OR/23177-5438
Associated with an experiment Yes
Experiment Number(s)
E03-006
E97-110
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Meeting / Conference
Meeting Name 10th International Workshop on Chiral Dynamics
Meeting Date 11/15/2021
Document Subtype Paper (proceedings only)
Attachments/Datasets/DOI Link
Document(s)
AD_pr_CD211.pdf (STI Document)
Deur_CD21.pdf (Supporting)
Dataset(s) (none)
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