Molecular Probe for Electroweak Physics

POSTER

Abstract

Parity nonconservation (PNC) arises in atoms and molecules due to neutral current electroweak (EW) interactions. Our experiment is sensitive to nuclear spin-dependent (NSD)-PNC including electron-vector times nucleon-axial (VeAn) interaction due to $Z^0$exchange. VeAn terms are suppressed in the Standard Model (SM) making NSD radiative corrections from weak interactions within the nucleus, known as nuclear anapole moments, significant to the overall NSD-PNC signal. We report on our experiment using rotational hyperfine (HF) levels of well understood diatomic molecules to study NSD-PNC. Initially, one state, B, of a pair of opposite parity HF ground states, A and B, of the molecule is depleted. In the interaction region (IR), A and B are Zeeman shifted to near degeneracy in order to amplify perturbative state mixing caused by NSD-PNC interactions. Interference with Stark-induced mixing is revealed using laser-induced fluorescence from B emerging from the IR. This technique is applicable to a wide class of molecules and the variety of nuclei within so that VeAn and anapole contributions to NSD-PNC can be deciphered. This will yield new anapole results and constrain VeAn coupling constants to up and down quarks which are at present poorly characterized SM parameters.

Authors

  • E.F. Deveney

    Bridgewater St. Coll.

  • V.E. Guiseppe

    University of Connecticut, Univ. of New Hampshire, Sandia National Labs, IBM Research Center, PTB, TUNL, Petersburg Nuc. Phys. Inst., Yale Univ., U.S. Coast Guard Acad., Department of Physics, University of Connecticut, Storrs, CT 06269-3046, Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213, Division of Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, Daejeon, Korea, Department of Chemistry, Sogang University, Seoul, Korea, Materials Science Department, Brookhaven National Lab, Upton, NY 11973, Canadian Light Source, University of Saskatchewan, Saskatoon, Canada, Department of Physics, University of Connecticut, Storrs, CT 06269, RMD Inc., Watertown, MA, ALEM Associates, Boston, MA, Physics Department, University of Connecticut, Storrs, CT, University of South Dakota, LANL

  • V.E. Guiseppe

    University of Connecticut, Univ. of New Hampshire, Sandia National Labs, IBM Research Center, PTB, TUNL, Petersburg Nuc. Phys. Inst., Yale Univ., U.S. Coast Guard Acad., Department of Physics, University of Connecticut, Storrs, CT 06269-3046, Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213, Division of Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, Daejeon, Korea, Department of Chemistry, Sogang University, Seoul, Korea, Materials Science Department, Brookhaven National Lab, Upton, NY 11973, Canadian Light Source, University of Saskatchewan, Saskatoon, Canada, Department of Physics, University of Connecticut, Storrs, CT 06269, RMD Inc., Watertown, MA, ALEM Associates, Boston, MA, Physics Department, University of Connecticut, Storrs, CT, University of South Dakota, LANL

  • V.E. Guiseppe

    University of Connecticut, Univ. of New Hampshire, Sandia National Labs, IBM Research Center, PTB, TUNL, Petersburg Nuc. Phys. Inst., Yale Univ., U.S. Coast Guard Acad., Department of Physics, University of Connecticut, Storrs, CT 06269-3046, Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213, Division of Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, Daejeon, Korea, Department of Chemistry, Sogang University, Seoul, Korea, Materials Science Department, Brookhaven National Lab, Upton, NY 11973, Canadian Light Source, University of Saskatchewan, Saskatoon, Canada, Department of Physics, University of Connecticut, Storrs, CT 06269, RMD Inc., Watertown, MA, ALEM Associates, Boston, MA, Physics Department, University of Connecticut, Storrs, CT, University of South Dakota, LANL

  • V.E. Guiseppe

    University of Connecticut, Univ. of New Hampshire, Sandia National Labs, IBM Research Center, PTB, TUNL, Petersburg Nuc. Phys. Inst., Yale Univ., U.S. Coast Guard Acad., Department of Physics, University of Connecticut, Storrs, CT 06269-3046, Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213, Division of Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, Daejeon, Korea, Department of Chemistry, Sogang University, Seoul, Korea, Materials Science Department, Brookhaven National Lab, Upton, NY 11973, Canadian Light Source, University of Saskatchewan, Saskatoon, Canada, Department of Physics, University of Connecticut, Storrs, CT 06269, RMD Inc., Watertown, MA, ALEM Associates, Boston, MA, Physics Department, University of Connecticut, Storrs, CT, University of South Dakota, LANL

  • V.E. Guiseppe

    University of Connecticut, Univ. of New Hampshire, Sandia National Labs, IBM Research Center, PTB, TUNL, Petersburg Nuc. Phys. Inst., Yale Univ., U.S. Coast Guard Acad., Department of Physics, University of Connecticut, Storrs, CT 06269-3046, Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213, Division of Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, Daejeon, Korea, Department of Chemistry, Sogang University, Seoul, Korea, Materials Science Department, Brookhaven National Lab, Upton, NY 11973, Canadian Light Source, University of Saskatchewan, Saskatoon, Canada, Department of Physics, University of Connecticut, Storrs, CT 06269, RMD Inc., Watertown, MA, ALEM Associates, Boston, MA, Physics Department, University of Connecticut, Storrs, CT, University of South Dakota, LANL

  • V.E. Guiseppe

    University of Connecticut, Univ. of New Hampshire, Sandia National Labs, IBM Research Center, PTB, TUNL, Petersburg Nuc. Phys. Inst., Yale Univ., U.S. Coast Guard Acad., Department of Physics, University of Connecticut, Storrs, CT 06269-3046, Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213, Division of Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, Daejeon, Korea, Department of Chemistry, Sogang University, Seoul, Korea, Materials Science Department, Brookhaven National Lab, Upton, NY 11973, Canadian Light Source, University of Saskatchewan, Saskatoon, Canada, Department of Physics, University of Connecticut, Storrs, CT 06269, RMD Inc., Watertown, MA, ALEM Associates, Boston, MA, Physics Department, University of Connecticut, Storrs, CT, University of South Dakota, LANL