SciPost Submission Page
Searches for lepton flavor violation in meson decays at Belle
by Sourav Patra
Submission summary
| Authors (as registered SciPost users): | Sourav Patra |
| Submission information | |
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| Preprint Link: | scipost_202406_00048v1 (pdf) |
| Date accepted: | 2024-12-19 |
| Date submitted: | 2024-06-20 06:05 |
| Submitted by: | Patra, Sourav |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 17th International Workshop on Tau Lepton Physics (TAU2023) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
We present the recent results on searches for charged lepton flavor violations (CLFV) using the Belle data. In the first section, we present a search for CLFV decays $B{}^0_s \rightarrow \ell^{\mp}\tau^{\pm}$, where $\ell = e, \mu$, using $121~\mathrm{fb}^{-1}$ data collected at the $\Upsilon(5S)$ resonance. We also report the results on searches for CLFV $B^+ \to K^+ \tau^\pm \ell^\mp$ decays, with~$\ell = (e, \mu)$, using $711~{\rm fb}^{-1}$ $\Upsilon(4S)$ data sample. Finally, we present a search for $\Upsilon(1S)\rightarrow\ell^\pm\ell^{\prime\mp}$ and radiative CLFV $\Upsilon(1S)\rightarrow\gamma\ell^\pm\ell^{\prime\mp}$ [$\ell,\ell^\prime = e, \mu, \tau$] decays using $25~{\rm fb}^{-1}$ data recorded at $\Upsilon(2S)$ resonance. This search uses $\Upsilon(1S)$ mesons produced in $\Upsilon(2S)\rightarrow\pi^+\pi^-\Upsilon(1S)$ transitions.
Current status:
Editorial decision:
For Journal SciPost Physics Proceedings: Publish
(status: Editorial decision fixed and (if required) accepted by authors)
Reports on this Submission
Report #1 by Swagato Banerjee (Referee 1) on 2024-12-3 (Invited Report)
Report
Searches for charged lepton flavor violation in meson decays using data from the Belle experiment are presented, including B s0 →ℓ ∓ τ ±, 𝐵+→𝐾+𝜏±ℓ∓ , and Υ(1S)→ℓ ±ℓ ′∓ and radiative Υ(1S)→γℓ± ℓ ′∓ decays. No evidence for signal was found, leading to stringent upper limits on branching fractions. These results enhance constraints on theoretical models predicting lepton flavor violations.
Recommendation
Publish (surpasses expectations and criteria for this Journal; among top 10%)