Abstract
We present an exactly soluble electron trajectory that permits an analysis of the soft (deep infrared) radiation emitted, the existence of which has been experimentally observed during beta decay via lowest order inner bremsstrahlung. Our treatment also predicts the time evolution and temperature of the emission, and possibly the spectrum, by analogy with the closely related phenomenon of the dynamic Casimir effect.
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Notes
Eq. (4) is unique within the Möbius symmetries of bilateral linear fractional transformations. The dual constraints of (A) reproducing the total energy Eq. (3), and (B) maintaining instantaneous collision reference frame asymptotics are highly restrictive. An alternate trajectory replicates (A) but including (B), i.e. requiring it start with initial zero velocity and end with final asymptotic constant final speed, forces the electron to travel in imaginary space or time, or move faster than light, \(\beta > c\).
This accounts for the generalization from 1+1 dimensions to 3+1 dimensions of spacetime [28].
The range can be observed by two detector types: one composed of bismuth germanium oxide (BGO) scintillators and an avalanche photo diode (APD). A low energy spectrum, 0.3 keV to 20 keV, can be measured by the APD and a higher energy spectrum, 10 keV to 1000 keV, can be measured by the BGO.
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Acknowledgements
The authors thank Stephen Fulling for useful discussion. Funding comes in part from the FY2021-SGP-1-STMM Faculty Development Competitive Research Grant No. 021220FD3951 at Nazarbayev University. Appreciation is given to the organizers, speakers, and participants of the QFTCS Workshop: May 23-27, 2022, at which preliminary results were first presented and helpful feedback are included therein.
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Good, M.R.R., Davies, P.C.W. Infrared Acceleration Radiation. Found Phys 53, 53 (2023). https://doi.org/10.1007/s10701-023-00694-x
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DOI: https://doi.org/10.1007/s10701-023-00694-x