New ideas in low-energy tests of fundamental physics

Search for new physics in atoms: cosmic PNC and variation of alpha

Vladimir Dzuba
University of New South Wales (UNSW)

June 18, 2014

PIRSA:14060030
Free Discussion

June 18, 2014

PIRSA:14060031
Optical magnetometry - From basics to Global Network of Optical Magnetometer for Exotic physics
- Nathan Leefer
  University of California System
- Szymon Pustelny
  University of California, Berkeley
June 19, 2014

PIRSA:14060032
Nuclear spin precession of noble gases in ultra low magnetic fields

Lutz Trahms
Physikalisch-Technische Bundesanstalt (PTB)

June 19, 2014

PIRSA:14060033
Atomic magnetometers for precision measurements

Mike Romalis
Princeton University

June 19, 2014

PIRSA:14060034
Probing the electron-proton mass ratio variation with AMO systems

Robin Cote
University of Connecticut

June 19, 2014

PIRSA:14060050
Summary

Derek Jackson Kimball
California State University, East Bay

June 19, 2014

PIRSA:14060037
Free Discussion

June 19, 2014

PIRSA:14060038

Search for new physics in atoms: cosmic PNC and variation of alpha

Vladimir Dzuba
University of New South Wales (UNSW)

June 18, 2014

PIRSA:14060030

We consider pseudo-scalar and pseudo-vector interaction of atomic electrons with hypothetical dark matter particles (e.g., axions). These interactions lead to oscillating atomic parity non-conserving (PNC) amplitudes and/or oscillating electric dipole moments (EDM). In static
limit for PNC, existing atomic PNC experiments can be used to constrain time component of the pseudo-vector field.

Possible variation of fundamental constants is suggested by theories unifying gravity with other interactions. Evidence of the space/time variation of the fine structure constant alpha is found in
the quasar absorption spectra. Optical transitions in highly charged ions can be used as sensitive tools for studying time variation of alpha in laboratory.
Free Discussion

June 18, 2014

PIRSA:14060031
Optical magnetometry - From basics to Global Network of Optical Magnetometer for Exotic physics
- Nathan Leefer
  University of California System
- Szymon Pustelny
  University of California, Berkeley
June 19, 2014

PIRSA:14060032

In our talk we seek to present a broad overview of the field of optical magnetometers, starting from basic principles to fundamental limitations to the variety of applications in which they have already found use. We will end with a report on the development of a new worldwide network of synchronized magnetometers that can be used to search for a variety of new physical phenomena (many of which are discussed at this conference!).
Nuclear spin precession of noble gases in ultra low magnetic fields

Lutz Trahms
Physikalisch-Technische Bundesanstalt (PTB)

June 19, 2014

PIRSA:14060033

In the low energy re¬gime, precision measurements of spin precession have gained increased attention as an alternative pathway to physics beyond the standard model. These measurements aim at the detection of minute frequency changes superimposed on low Larmor frequencies at extremely weak magnetic fields. Such measurements require an effective shielding against the magnetic field of the Earth and other perturbations. For measuring the precession frequency with high precision, a long lifetime of the precessing nuclear magnetization is required, thus the homogeneity of the applied field is a crucial parameter. In addition, criteria are needed that unambiguously distinguish magnetic artifacts from the non-magnetic exotic interactions that we search for. This can be accomplished by the concept of co-magnetometry, i.e., by simultaneous measuring the precession of two nuclear species such as 3He and 129Xe. Yet another kind of co-magnetometry is the use of SQUIDs for monitoring the spin precession. SQUIDs are magnetic field detectors of their own kind, which can measure the oscillating magnetic field generated by the precessing nuclear magnetic moment as well as the magnetic dc background field. In this presentation, I will report on the current state of the art in our lab in measurements of nuclear spin precession of noble gases.
Atomic magnetometers for precision measurements

Mike Romalis
Princeton University

June 19, 2014

PIRSA:14060034

Atomic magnetometers have a long history in tests of Standard Model since they provide sensitive constraints on new spin interactions. I will review recent progress in magnetometry using electron and nuclear spins, describe some of the limits set on new physics and discuss ideas for future experiments.
Probing the electron-proton mass ratio variation with AMO systems

Robin Cote
University of Connecticut

June 19, 2014

PIRSA:14060050
Summary

Derek Jackson Kimball
California State University, East Bay

June 19, 2014

PIRSA:14060037
Free Discussion

June 19, 2014

PIRSA:14060038

Title	Speaker(s)	Date	Talk Type	Info
Search for new physics in atoms: cosmic PNC and variation of alpha	Vladimir Dzuba	2014-06-18	Conference	View details
Free Discussion		2014-06-18	Conference	View details
Optical magnetometry - From basics to Global Network of Optical Magnetometer for Exotic physics	Nathan Leefer, Szymon Pustelny	2014-06-19	Conference	View details
Nuclear spin precession of noble gases in ultra low magnetic fields	Lutz Trahms	2014-06-19	Conference	View details
Atomic magnetometers for precision measurements	Mike Romalis	2014-06-19	Conference	View details
Probing the electron-proton mass ratio variation with AMO systems	Robin Cote	2014-06-19	Other	View details
Summary	Derek Jackson Kimball	2014-06-19	Conference	View details
Free Discussion		2014-06-19	Conference	View details

New ideas in low-energy tests of fundamental physics

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