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New Measurements of the Beam-Normal Single Spin Asymmetry in Elastic Electron Scattering over a Range of Spin-0 Nuclei.
Adhikari, D; Albataineh, H; Androic, D; Aniol, K; Armstrong, D S; Averett, T; Ayerbe Gayoso, C; Barcus, S; Bellini, V; Beminiwattha, R S; Benesch, J F; Bhatt, H; Bhatta Pathak, D; Bhetuwal, D; Blaikie, B; Boyd, J; Campagna, Q; Camsonne, A; Cates, G D; Chen, Y; Clarke, C; Cornejo, J C; Covrig Dusa, S; Dalton, M M; Datta, P; Deshpande, A; Dutta, D; Feldman, C; Fuchey, E; Gal, C; Gaskell, D; Gautam, T; Gericke, M; Ghosh, C; Halilovic, I; Hansen, J-O; Hauenstein, F; Henry, W; Horowitz, C J; Jantzi, C; Jian, S; Johnston, S; Jones, D C; Karki, B; Kakkar, S; Katugampola, S; Keppel, C E; King, P M; King, D E; Knauss, M.
Affiliation
  • Adhikari D; Idaho State University, Pocatello, Idaho 83209, USA.
  • Albataineh H; Texas A & M University - Kingsville, Kingsville, Texas 78363, USA.
  • Androic D; University of Zagreb, Faculty of Science, Zagreb HR 10002, Croatia.
  • Aniol K; California State University, Los Angeles, Los Angeles, California 90032, USA.
  • Armstrong DS; William & Mary, Williamsburg, Virginia 23185, USA.
  • Averett T; William & Mary, Williamsburg, Virginia 23185, USA.
  • Ayerbe Gayoso C; William & Mary, Williamsburg, Virginia 23185, USA.
  • Barcus S; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Bellini V; Istituto Nazionale di Fisica Nucleare, Sezione di Catania, 95123 Catania, Italy.
  • Beminiwattha RS; Louisiana Tech University, Ruston, Louisiana 71272, USA.
  • Benesch JF; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Bhatt H; Mississippi State University, Mississippi State, Mississippi 39762, USA.
  • Bhatta Pathak D; Louisiana Tech University, Ruston, Louisiana 71272, USA.
  • Bhetuwal D; Mississippi State University, Mississippi State, Mississippi 39762, USA.
  • Blaikie B; University of Manitoba, Winnipeg, Manitoba R3T2N2, Canada.
  • Boyd J; University of Virginia, Charlottesville, Virginia 22904, USA.
  • Campagna Q; William & Mary, Williamsburg, Virginia 23185, USA.
  • Camsonne A; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Cates GD; University of Virginia, Charlottesville, Virginia 22904, USA.
  • Chen Y; Louisiana Tech University, Ruston, Louisiana 71272, USA.
  • Clarke C; Stony Brook, State University of New York, Stony Brook, New York 11794, USA.
  • Cornejo JC; Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
  • Covrig Dusa S; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Dalton MM; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Datta P; University of Connecticut, Storrs, Connecticut 06269, USA.
  • Deshpande A; Stony Brook, State University of New York, Stony Brook, New York 11794, USA.
  • Dutta D; Center for Frontiers in Nuclear Science, Stony Brook, New York 11794, USA.
  • Feldman C; Brookhaven National Laboratory, Upton, New York 11973, USA.
  • Fuchey E; Mississippi State University, Mississippi State, Mississippi 39762, USA.
  • Gal C; Stony Brook, State University of New York, Stony Brook, New York 11794, USA.
  • Gaskell D; Institute for Advanced Computational Science, Stony Brook, New York 11794, USA.
  • Gautam T; University of Connecticut, Storrs, Connecticut 06269, USA.
  • Gericke M; Mississippi State University, Mississippi State, Mississippi 39762, USA.
  • Ghosh C; University of Virginia, Charlottesville, Virginia 22904, USA.
  • Halilovic I; Stony Brook, State University of New York, Stony Brook, New York 11794, USA.
  • Hansen JO; Center for Frontiers in Nuclear Science, Stony Brook, New York 11794, USA.
  • Hauenstein F; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Henry W; Hampton University, Hampton, Virginia 23668, USA.
  • Horowitz CJ; University of Manitoba, Winnipeg, Manitoba R3T2N2, Canada.
  • Jantzi C; Stony Brook, State University of New York, Stony Brook, New York 11794, USA.
  • Jian S; University of Massachusetts Amherst, Amherst, Massachusetts 01003, USA.
  • Johnston S; University of Manitoba, Winnipeg, Manitoba R3T2N2, Canada.
  • Jones DC; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Karki B; Old Dominion University, Norfolk, Virginia 23529, USA.
  • Kakkar S; Temple University, Philadelphia, Pennsylvania 19122, USA.
  • Katugampola S; Indiana University, Bloomington, Indiana 47405, USA.
  • Keppel CE; University of Virginia, Charlottesville, Virginia 22904, USA.
  • King PM; University of Virginia, Charlottesville, Virginia 22904, USA.
  • King DE; University of Massachusetts Amherst, Amherst, Massachusetts 01003, USA.
  • Knauss M; Temple University, Philadelphia, Pennsylvania 19122, USA.
Phys Rev Lett ; 128(14): 142501, 2022 Apr 08.
Article in En | MEDLINE | ID: mdl-35476486
We report precision determinations of the beam-normal single spin asymmetries (A_{n}) in the elastic scattering of 0.95 and 2.18 GeV electrons off ^{12}C, ^{40}Ca, ^{48}Ca, and ^{208}Pb at very forward angles where the most detailed theoretical calculations have been performed. The first measurements of A_{n} for ^{40}Ca and ^{48}Ca are found to be similar to that of ^{12}C, consistent with expectations and thus demonstrating the validity of theoretical calculations for nuclei with Z≤20. We also report A_{n} for ^{208}Pb at two new momentum transfers (Q^{2}) 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 A_{n} for nuclei containing ≲50 nucleons, but point to the need for further investigation to understand the unusual A_{n} behavior discovered for scattering off ^{208}Pb.
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Full text: 1 Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2022 Type: Article Affiliation country: United States
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Full text: 1 Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2022 Type: Article Affiliation country: United States