Measuring the electric dipole moment of the electron in BaF

Parul Aggarwal; Hendrick L. Bethlem; Anastasia Borschevsky; Malika Denis; Kevin Esajas; Pi A. B. Haase; Yongliang Hao; Steven Hoekstra; Klaus Jungmann; Thomas B. Meijknecht; Maarten C. Mooij; Rob G. E. Timmermans; Wim Ubachs; Lorenz Willmann; Artem Zapara

doi:10.1140/epjd/e2018-90192-9

Measuring the electric dipole moment of the electron in BaF

Parul Aggarwal, Hendrick L. Bethlem, Anastasia Borschevsky, Malika Denis, Kevin Esajas, Pi A. B. Haase, Yongliang Hao, Steven Hoekstra, Klaus Jungmann, Thomas B. Meijknecht, Maarten C. Mooij, Rob G. E. Timmermans, Wim Ubachs, Lorenz Willmann, Artem Zapara

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

We investigate the merits of a measurement of the permanent electric dipole moment of the electron (eEDM) with barium monofluoride molecules, thereby searching for phenomena of CP violation beyond those incorporated in the standard model (SM) of particle physics. Although the BaF molecule has a smaller enhancement factor in terms of the effective electric field than other molecules used in current studies (YbF, ThO and ThF+), we show that a competitive measurement is possible by combining Stark-deceleration, laser-cooling and an intense primary cold source of BaF molecules. With the long coherent interaction times obtainable in a cold beam of BaF, a sensitivity of 5 × 10−30 e⋅cm for an eEDM is feasible. We describe the rationale, the challenges and the experimental methods envisioned to achieve this target.

Original language	English
Article number	197
Journal	European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics
Volume	72
Issue number	11
DOIs	https://doi.org/10.1140/epjd/e2018-90192-9
Publication status	Published - 20 Nov 2018

Funding

This work is part of the research programme “Physics beyond the Standar Model with cold molecules” with project number 166, which is financed by the Netherlands Organisation for Scientific Research (NWO).

Funders	Funder number
Horizon 2020 Framework Programme	670168
Nederlandse Organisatie voor Wetenschappelijk Onderzoek

Keywords

Molecular Physics and Chemical Physics

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Aggarwal, P., Bethlem, H. L., Borschevsky, A., Denis, M., Esajas, K., Haase, P. A. B., Hao, Y., Hoekstra, S., Jungmann, K., Meijknecht, T. B., Mooij, M. C., Timmermans, R. G. E., Ubachs, W., Willmann, L., & Zapara, A. (2018). Measuring the electric dipole moment of the electron in BaF. European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics, 72(11), Article 197. https://doi.org/10.1140/epjd/e2018-90192-9

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abstract = "We investigate the merits of a measurement of the permanent electric dipole moment of the electron (eEDM) with barium monofluoride molecules, thereby searching for phenomena of CP violation beyond those incorporated in the standard model (SM) of particle physics. Although the BaF molecule has a smaller enhancement factor in terms of the effective electric field than other molecules used in current studies (YbF, ThO and ThF+), we show that a competitive measurement is possible by combining Stark-deceleration, laser-cooling and an intense primary cold source of BaF molecules. With the long coherent interaction times obtainable in a cold beam of BaF, a sensitivity of 5 × 10−30 e⋅cm for an eEDM is feasible. We describe the rationale, the challenges and the experimental methods envisioned to achieve this target. ",

keywords = "Molecular Physics and Chemical Physics",

author = "Parul Aggarwal and Bethlem, {Hendrick L.} and Anastasia Borschevsky and Malika Denis and Kevin Esajas and Haase, {Pi A. B.} and Yongliang Hao and Steven Hoekstra and Klaus Jungmann and Meijknecht, {Thomas B.} and Mooij, {Maarten C.} and Timmermans, {Rob G. E.} and Wim Ubachs and Lorenz Willmann and Artem Zapara",

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Aggarwal, P, Bethlem, HL, Borschevsky, A, Denis, M, Esajas, K, Haase, PAB, Hao, Y, Hoekstra, S, Jungmann, K, Meijknecht, TB, Mooij, MC, Timmermans, RGE, Ubachs, W, Willmann, L & Zapara, A 2018, 'Measuring the electric dipole moment of the electron in BaF', European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics, vol. 72, no. 11, 197. https://doi.org/10.1140/epjd/e2018-90192-9

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AU - Aggarwal, Parul

AU - Bethlem, Hendrick L.

AU - Borschevsky, Anastasia

AU - Denis, Malika

AU - Esajas, Kevin

AU - Haase, Pi A. B.

AU - Hao, Yongliang

AU - Hoekstra, Steven

AU - Jungmann, Klaus

AU - Meijknecht, Thomas B.

AU - Mooij, Maarten C.

AU - Timmermans, Rob G. E.

AU - Ubachs, Wim

AU - Willmann, Lorenz

AU - Zapara, Artem

PY - 2018/11/20

Y1 - 2018/11/20

N2 - We investigate the merits of a measurement of the permanent electric dipole moment of the electron (eEDM) with barium monofluoride molecules, thereby searching for phenomena of CP violation beyond those incorporated in the standard model (SM) of particle physics. Although the BaF molecule has a smaller enhancement factor in terms of the effective electric field than other molecules used in current studies (YbF, ThO and ThF+), we show that a competitive measurement is possible by combining Stark-deceleration, laser-cooling and an intense primary cold source of BaF molecules. With the long coherent interaction times obtainable in a cold beam of BaF, a sensitivity of 5 × 10−30 e⋅cm for an eEDM is feasible. We describe the rationale, the challenges and the experimental methods envisioned to achieve this target.

AB - We investigate the merits of a measurement of the permanent electric dipole moment of the electron (eEDM) with barium monofluoride molecules, thereby searching for phenomena of CP violation beyond those incorporated in the standard model (SM) of particle physics. Although the BaF molecule has a smaller enhancement factor in terms of the effective electric field than other molecules used in current studies (YbF, ThO and ThF+), we show that a competitive measurement is possible by combining Stark-deceleration, laser-cooling and an intense primary cold source of BaF molecules. With the long coherent interaction times obtainable in a cold beam of BaF, a sensitivity of 5 × 10−30 e⋅cm for an eEDM is feasible. We describe the rationale, the challenges and the experimental methods envisioned to achieve this target.

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Measuring the electric dipole moment of the electron in BaF

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Keywords

UN SDGs

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