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Measurement of the presence of $\mathrm{a}_1(1420)$ and $ω(782)$ in $τ^-\toπ^-π^-π^+ν_τ$ at Belle
by Andrei Rabusov, Daniel Greenwald, Stephan Paul
This is not the latest submitted version.
Submission summary
| Authors (as registered SciPost users): | Andrei Rabusov |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2405.19264v3 (pdf) |
| Date submitted: | 2024-11-27 08:57 |
| Submitted by: | Rabusov, Andrei |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 17th International Workshop on Tau Lepton Physics (TAU2023) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
We present preliminary results of a partial-wave analysis of $\tau^-\to\pi^-\pi^-\pi^+\nu_\tau$ using data from the Belle experiment at the KEKB $\mathrm{e}^+\mathrm{e}^-$ collider. We validate our model with a model-independent analysis. We see the $\mathrm{a}_1(1420)$ and a G-parity-violating $1^-[\omega(782)\pi]_\mathrm{P}$ wave in tauon decays. Our results will improve models used in simulation studies necessary for measuring the electric and magnetic dipole moments and Michel parameters of the $\tau$.
List of changes
-resonances are present and in what amounts is also poorly known. The
+resonances are present and in what amounts are also poorly known. The
-efficiency and purity without introducing significantly uneven
+the statistical precision of our results without introducing significantly uneven
-two hemispheres defined by the axis that minimizes the thrust of all
+two hemispheres defined by the thrust axis calculated using all
-center-of-momentum frame.
+$\Ppositron\Pelectron$ center-of-momentum frame.
-energies in the signal hemisphere be below \SI{480}{MeV}.
+energies in the signal hemisphere be below \SI{480}{MeV}, summing over
+photons with at least \SI{40}{MeV}.
-with spin $j$; $L$ is the total angular momentum of the three pions.
+with spin $j$, with $L$ the total angular momentum.
-\QMIPWA; this is their first sighting in tauon decay.
+\QMIPWA. This is their first sighting in tauon decay.
Current status:
Reports on this Submission
Report #1 by David Brown (Referee 2) on 2024-12-14 (Invited Report)
Strengths
1. Important measurement - will lead to improved BSM measurements.
2. This is a solid technique application.
Weaknesses
1. English needs improvement for clarity.
2. A better discussion of your model would be useful.
Report
This is the right target for this publication as it is a conference preceding. Some modifications are necessary to make the paper more readable. Once the readability is sufficient, this paper should be ready for publication.
Requested changes
Please see the attached PDF file for suggestions. This may not be the last set of modifications needed, but the paper should be more readable and easier to edit further.
Recommendation
Ask for minor revision
Author: Andrei Rabusov on 2025-01-27 [id 5151]
(in reply to Report 1 by David Brown on 2024-12-14)Dear referees,
thank you for your review. Please find our response below:
We agree to remove the sentence from the abstract.
The "are" in the second paragraph of the introduction is correct, the "is" is not.
We prefer to leave the statement about the K*K scattering as it is. The reference explains how it clarifies the issue. This is not the final paper, where we are going to present the final result.
We removed the last sentence of the introduction.
We prefer natural units where c = hbar = 1.
We have added to the text the information about the pi0's background ratio to the signal: "And we reduce the presence of neutral pions by requiring the sum of photon energies in the signal hemisphere be below 480 MeV, summing over photons with at least 40 MeV. The last requirement reduces the ratio of the number of events with an additional π0 to the number of signal events from 51% to 15%."
We write "the Euler angles of the three-pion plane".
We write "(QMIPWA), also known as freed-isobar PWA [ref]".
As for the broken references, they are taken from inspirehep.net. I have also tried to change one of them from Inspire to Arxiv, but the URLs to Arxiv remain broken.
The new version of the document has been submitted to the archive and it is scheduled to be announced at Tue, 28 Jan 2025 01:00:00 GMT.