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Affiliations

• ¹ Helmholtz-Institut Mainz, Johannes Gutenberg University, 55128 Mainz, Germany.
• ² Department of Physics, Stanford Institute for Theoretical Physics, Stanford University, California 94305, USA.
• ³ Department of Physics, California State University-East Bay, Hayward, California 94542-3084, USA.
• ⁴ Department of Physics, University of California at Berkeley, California 94720-7300, USA.
• ⁵ Department of Physics, Boston University, Boston, Massachusetts 02215, USA.
• ⁶ Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.