Muon Spin Relaxation Rates as a Limit on Fluctuating Torsion Fields in Solids
Year: 2026
Type: article
Abstract: This paper examines how precisely muon spin relaxation in a solid sample limits fluctuating spin couplings at the muon site. The system considered is positive muons implanted in a solid with field sensitivity near 10 microtesla, and the observable is relaxation rate, local-field sensitivity and the implied coupling limit. Evaluating the ordinary behaviour of the system and the spin-torsion contribution under explicit assumptions about polarisation and uniformity, and inverting the comparison at the stated laboratory precision, gives a quantitative bound rather than a qualitative assertion of smallness. The computed record is: field_sensitivity_T = 1.000e-05; energy_J = 4.490e-31; torsion_bound_per_m = 1.420e-05; relaxation_rate_per_s = 8516; muon_lifetime_s = 2.197e-06. The torsion-related contribution is far below the level that would alter the ordinary behaviour of the system at current precision, and the value that would have produced a visible residual is stated so that future improvements can be assessed against it directly. No new measurement is reported. This study is simulated and computed from stated assumptions, not measured.
Author: Aldred, William Alexander
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7225835758
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