Saved in:
| Main Author: | |
|---|---|
| Format: | Preprint |
| Published: |
2022
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2207.07555 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866914692550623232 |
|---|---|
| author | The Belle Collaboration |
| author_facet | The Belle Collaboration |
| contents | We measure the branching fraction for the Cabibbo-suppressed decay $D^0\rightarrow K^0_S\,K^0_S\,π^+π^-$ and search for $CP$ violation via a measurement of the $CP$ asymmetry $A_{\rm CP}$ as well as the $T$-odd triple-product asymmetry $a^T_{\rm CP}$. We use 922 fb$^{-1}$ of data recorded by the Belle experiment, which ran at the KEKB asymmetric-energy $e^+e^-$ collider. The branching fraction is measured relative to the Cabibbo-favored normalization channel $D^0\rightarrow K^0_S\,π^+π^-$; the result is $\mathcal{B}(D^0\rightarrow K^0_S\,K^0_S\,π^+π^-) = [4.79 \pm 0.08\,({\rm stat}) \pm 0.10\,({\rm syst}) \pm 0.31\,({\rm norm})]\times 10^{-4}$, where the first uncertainty is statistical, the second is systematic, and the third is from uncertainty in the normalization channel. We also measure $A_{\rm CP} = [-2.51\,\pm 1.44\,({\rm stat})\,^{+0.11}_{-0.10}\,({\rm syst})]\%$, and $a^T_{\rm CP} = [-1.95\,\pm 1.42\,({\rm stat})\,^{+0.14}_{-0.12}\,({\rm syst})]\%$. These results show no evidence of CP violation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2207_07555 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Measurement of the branching fraction and search for CP violation in $D^0\rightarrow K^0_S\,K^0_S\,π^+π^-$ decays at Belle The Belle Collaboration High Energy Physics - Experiment We measure the branching fraction for the Cabibbo-suppressed decay $D^0\rightarrow K^0_S\,K^0_S\,π^+π^-$ and search for $CP$ violation via a measurement of the $CP$ asymmetry $A_{\rm CP}$ as well as the $T$-odd triple-product asymmetry $a^T_{\rm CP}$. We use 922 fb$^{-1}$ of data recorded by the Belle experiment, which ran at the KEKB asymmetric-energy $e^+e^-$ collider. The branching fraction is measured relative to the Cabibbo-favored normalization channel $D^0\rightarrow K^0_S\,π^+π^-$; the result is $\mathcal{B}(D^0\rightarrow K^0_S\,K^0_S\,π^+π^-) = [4.79 \pm 0.08\,({\rm stat}) \pm 0.10\,({\rm syst}) \pm 0.31\,({\rm norm})]\times 10^{-4}$, where the first uncertainty is statistical, the second is systematic, and the third is from uncertainty in the normalization channel. We also measure $A_{\rm CP} = [-2.51\,\pm 1.44\,({\rm stat})\,^{+0.11}_{-0.10}\,({\rm syst})]\%$, and $a^T_{\rm CP} = [-1.95\,\pm 1.42\,({\rm stat})\,^{+0.14}_{-0.12}\,({\rm syst})]\%$. These results show no evidence of CP violation. |
| title | Measurement of the branching fraction and search for CP violation in $D^0\rightarrow K^0_S\,K^0_S\,π^+π^-$ decays at Belle |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2207.07555 |