SciPost Submission Page
Pion electronic decay and lepton universality
by D. Počanić
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Dinko Pocanic |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202105_00017v1 (pdf) |
| Date accepted: | 2021-06-16 |
| Date submitted: | 2021-05-12 04:57 |
| Submitted by: | Pocanic, Dinko |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | Review of Particle Physics at PSI (PSI2020) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
In common with a number of simple processes involving elementary particles, charged pion decays are profoundly shaped by applicable Standard Model (SM) symmetries and properties. Given the highly precise SM theoretical description, pion decays are used as selective probes of SM parameters, and of possible SM extensions. The PEN experiment at PSI is studying the π + → e + ν e (γ), or π_ e2(γ) decay. The primary goal is to reach the relative precision of 5 × 10 ^{−4} in Re/μ^π, the branching ratio for π_ e2(γ) decay. We review the PEN research program, its present status, and prospects.
Published as SciPost Phys. Proc. 5, 025 (2021)
Reports on this Submission
Report #2 by Adrian Signer (Referee 1) on 2021-6-9 (Invited Report)
- Cite as: Adrian Signer, Report on arXiv:scipost_202105_00017v1, delivered 2021-06-09, doi: 10.21468/SciPost.Report.3044
Report
We (the editors Cy Hoffman, Klaus Kirch, Adrian Signer) had the
opportunity to review an earlier draft of the article and were in
communication with the authors before the submission. All our comments
and suggestions have been taken into account. Hence, we think the
paper can now be published in the current form.
Report #1 by Anonymous (Referee 2) on 2021-6-1 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202105_00017v1, delivered 2021-06-01, doi: 10.21468/SciPost.Report.3010
Strengths
The paper discusses the important measurement of the branching ratio of pi-> e nu decay which was performed at PSI a decade ago but has not yet produced a result. It gives a good description of the experiment and provides estimates of the uncertainties, explaining the principal contributions.
Weaknesses
The paper is similar to other publications by the author and the PEN group, providing minimal new information.
The estimate of the main uncertainty is stated to have reached the goal for the experiment but no details are provided to support the assertion that the Monte Carlo calculation is sufficient to do so.
Report
The paper briefly describes an important experiment and is suitable for publication in the journal.
Requested changes
1. Typo in line 43.