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Muon Decay
by W. Fetscher
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Submission summary
| Authors (as registered SciPost users): | Wulf Fetscher |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202106_00032v2 (pdf) |
| Date submitted: | 2021-07-06 09:54 |
| Submitted by: | Fetscher, Wulf |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | Review of Particle Physics at PSI (PSI2020) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Experimental, Phenomenological |
Abstract
The decay of the muon has been studied at PSI with several precision measurements: The longitudinal polarization PL(E) with the muon decay parameters ξ′, ξ′′, the Time- Reversal Invariance (TRI) conserving transverse polarization PT1(E) with the muon de- cay parameters η, η′′, the TRI violating transverse polarization PT2(E), with α′/A, β′/A and the muon decay asymmetry with Pμξ. The detailed theoretical analysis of all mea- surements of normal and inverse muon decay has led for the first time to a lower limit |g V | > 0.960 ("V − A") and upper limits for nine other possible complex couplings, espe- cially the scalar coupling |g S | < 0.550 which had not been excluded before.
List of changes
1) I Added the definition of inverse muon decay.
2) Now the coordinate system in Fig. 6.1 agrees with the definition of the transverse polarization.
3) I added a sentence to reference Fig. 6.7.
Current status:
Reports on this Submission
Anonymous Report 1 on 2021-7-6 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202106_00032v2, delivered 2021-07-06, doi: 10.21468/SciPost.Report.3203
Report
Eq. (6.1) and the discussion around it should still be improved. The titel of the section is Hamiltonian, but no Hamiltonian is given. The Gamma (capital letter) are not defined but called interactions, which is misleading as they are Dirac gamma matrices. There should also be no ident after this equation.