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Limits on Anomalous Spin-Spin Interactions Using Noble-Gas Nuclear Magnetic Resonance
Haowen Su1, Shiju Hu1, Yang Ding1
1University of Science and Technology of China, 1, Laboratory of Spin Magnetic Resonance, School of Physical Sciences, Anhui Province Key Laboratory of Scientific Instrument Development and Application, Hefei 230026, China.
Researchers developed a sensitive magnetometer to search for ultralight bosons, potential dark matter candidates. This new method sets unprecedented limits on Z
Area of Science:
- Particle Physics
- Cosmology
- Astrophysics
Background:
- Theories beyond the Standard Model propose ultralight bosons as dark matter candidates.
- Precision measurements offer a promising avenue for detecting these hypothetical particles.
- Detecting these bosons requires measuring minute energy shifts in standard-model particles.
Purpose of the Study:
- To develop a highly sensitive magnetometer for detecting ultralight bosons.
- To search for anomalous Z' boson-mediated spin-spin interactions.
- To establish new constraints on hypothetical particle couplings.
Main Methods:
- Development of a noble-gas nuclear magnetic resonance magnetometer.
- Achieving an energy resolution of approximately 10^-23 eV.
- Measuring energy shifts in nuclear spins induced by Z' bosons.
Main Results:
- Set the most stringent constraints on anomalous neutron-neutron and neutron-proton spin couplings for Z' bosons.
- Constraints surpass previous limits by up to 17 orders of magnitude.
- Established new, stringent limits on neutron-proton spin couplings mediated by paraphotons, exceeding prior constraints by at least 25 orders of magnitude.
Conclusions:
- The developed magnetometer technique provides a powerful tool for searching for new physics beyond the Standard Model.
- The null results significantly advance the search for ultralight bosons and anomalous spin-spin interactions.
- This method opens new avenues for exploring axion-like particles and other exotic phenomena.
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