@article{fcd9073c4f284ae394fd6977f8249b88,
title = "New Measurements of the Beam-Normal Single Spin Asymmetry in Elastic Electron Scattering over a Range of Spin-0 Nuclei",
abstract = "We report precision determinations of the beam-normal single spin asymmetries (An) in the elastic scattering of 0.95 and 2.18 GeV electrons off C12, Ca40, Ca48, and Pb208 at very forward angles where the most detailed theoretical calculations have been performed. The first measurements of An for Ca40 and Ca48 are found to be similar to that of C12, consistent with expectations and thus demonstrating the validity of theoretical calculations for nuclei with Z≤20. We also report An for Pb208 at two new momentum transfers (Q2) extending the previous measurement. Our new data confirm the surprising result previously reported, with all three data points showing significant disagreement with the results from the Z≤20 nuclei. These data confirm our basic understanding of the underlying dynamics that govern An for nuclei containing 50 nucleons, but point to the need for further investigation to understand the unusual An behavior discovered for scattering off Pb208.",
author = "{PREX and CREX Collaborations} and D. Adhikari and H. Albataineh and D. Androic and K. Aniol and Armstrong, {D. S.} and T. Averett and {Ayerbe Gayoso}, C. and S. Barcus and V. Bellini and Beminiwattha, {R. S.} and Benesch, {J. F.} and H. Bhatt and {Bhatta Pathak}, D. and D. Bhetuwal and B. Blaikie and J. Boyd and Q. Campagna and A. Camsonne and Cates, {G. D.} and Y. Chen and C. Clarke and Cornejo, {J. C.} and {Covrig Dusa}, S. and Dalton, {M. M.} and P. Datta and A. Deshpande and D. Dutta and C. Feldman and E. Fuchey and C. Gal and D. Gaskell and T. Gautam and M. Gericke and C. Ghosh and I. Halilovic and Hansen, {J. O.} and F. Hauenstein and W. Henry and Horowitz, {C. J.} and C. Jantzi and S. Jian and S. Johnston and Jones, {D. C.} and B. Karki and S. Kakkar and S. Katugampola and Keppel, {C. E.} and King, {P. M.} and King, {D. E.} and Souder, {P. A.}",
note = "Funding Information: We thank the entire staff of JLab for their efforts to develop and maintain the polarized beam and the experimental apparatus, and acknowledge the support of the U.S. Department of Energy, the National Science Foundation, and NSERC (Canada). This material is based upon the work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics Contract No. DE-AC05-06OR23177. Publisher Copyright: {\textcopyright} 2022 American Physical Society.",
year = "2022",
month = apr,
day = "8",
doi = "10.1103/PhysRevLett.128.142501",
language = "English (US)",
volume = "128",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "14",
}