An electron electric dipole moment search in the X3δ1 ground state of tungsten carbide molecules

J. Lee; E. R. Meyer; R. Paudel; J. L. Bohn; A. E. Leanhardt

doi:10.1080/09500340903349930

An electron electric dipole moment search in the X³δ1 ground state of tungsten carbide molecules

J. Lee, E. R. Meyer, R. Paudel, J. L. Bohn, A. E. Leanhardt

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

We identify the X³δ1 electronic ground state of tungsten carbide (WC) as a candidate molecular system in which to search for a permanent electric dipole moment (EDM) of the electron. The valence electrons in tungsten carbide experience an effective electric field of order 54 GV cm^-1 when the molecule is placed in a laboratory electric field of just a few mV cm^-1. Currently, a continuous tungsten carbide molecular beam is under construction. Tungsten atoms are evaporated from a resistively heated tungsten filament and are entrained in a noble gas jet containing a small fraction of methane. Tungsten carbide molecules are formed through the reaction W + CH₄→ WC + 2H₂.

Original language	English
Pages (from-to)	2005-2012
Number of pages	8
Journal	Journal of Modern Optics
Volume	56
Issue number	18-19
DOIs	https://doi.org/10.1080/09500340903349930
State	Published - Oct 2009
Externally published	Yes

Funding

We thank the Physics of Quantum Electronics XXXIX organizing committee, Marlan O. Scully, M. Suhail Zubairy, and George R. Welch, for the invitation to present our research. Also, we acknowledge valuable insights and comments from T. Chupp, E. Cornell, L. Sinclair, and R. Stutz throughout the development of this work. This work was partially funded by the NSF.

Funders	Funder number
National Science Foundation

Keywords

CP-violation
Electron electric dipole moment
Precision measurement
Supersymmetry
Tungsten carbide

Access to Document

10.1080/09500340903349930

Cite this

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abstract = "We identify the X3δ1 electronic ground state of tungsten carbide (WC) as a candidate molecular system in which to search for a permanent electric dipole moment (EDM) of the electron. The valence electrons in tungsten carbide experience an effective electric field of order 54 GV cm-1 when the molecule is placed in a laboratory electric field of just a few mV cm-1. Currently, a continuous tungsten carbide molecular beam is under construction. Tungsten atoms are evaporated from a resistively heated tungsten filament and are entrained in a noble gas jet containing a small fraction of methane. Tungsten carbide molecules are formed through the reaction W + CH4→ WC + 2H2.",

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AU - Meyer, E. R.

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AU - Bohn, J. L.

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AB - We identify the X3δ1 electronic ground state of tungsten carbide (WC) as a candidate molecular system in which to search for a permanent electric dipole moment (EDM) of the electron. The valence electrons in tungsten carbide experience an effective electric field of order 54 GV cm-1 when the molecule is placed in a laboratory electric field of just a few mV cm-1. Currently, a continuous tungsten carbide molecular beam is under construction. Tungsten atoms are evaporated from a resistively heated tungsten filament and are entrained in a noble gas jet containing a small fraction of methane. Tungsten carbide molecules are formed through the reaction W + CH4→ WC + 2H2.

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