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Neutrino mass constraints on beta decay
1The Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA.
Physical Review Letters
|May 21, 2005
Summary
This study provides new, stringent constraints on non-standard-model interactions involving neutrinos and quarks. The findings significantly improve limits on scalar and tensor weak interactions, crucial for understanding particle physics beyond the Standard Model.
Area of Science:
- Particle Physics
- Neutrino Physics
- Beyond Standard Model Physics
Background:
- Neutrino masses can be influenced by non-standard-model interactions.
- Loop corrections to neutrino mass are sensitive to these interactions.
Purpose of the Study:
- Derive constraints on non-standard-model d --> ue- nu interactions.
- Improve experimental limits on scalar and tensor weak interactions.
Main Methods:
- Utilized the connection between upper limits on neutrino mass and non-standard-model interactions.
- Translated constraints to limits on n --> pe- nu coupling constants.
Main Results:
- Derived improved constraints on scalar and tensor weak interactions.
- Achieved improvements exceeding an order of magnitude over current experimental limits.
- Established specific upper bounds for coupling constants: |C(S)/C(V)| < 5x10^-3, |C'(S)/C(V)| < 5x10^-3, |C(T)/C(A)| < 1.2x10^-2, |C'(T)/C(A)| < 1.2x10^-2.
Conclusions:
- The study provides the most stringent constraints to date on specific non-standard-model interactions.
- These results significantly advance the search for new physics beyond the Standard Model.