Highlights of recent BESIII results
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866912184634703872 |
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| author | Prasad, Vindhyawasini |
| author_facet | Prasad, Vindhyawasini |
| contents | This report highlights the recent BESIII results related to the measurement of the $R$ value, radiative decays of $J/ψ$ and the polarization of $D^0 \to ωϕ$ decay. BESIII, a symmetric electron-positron collider experiment, has collected a large data sample at several energy points in the tau-charm region, including the $J/ψ$ and $ψ(3770)$ resonances. Based on the data samples collected at 14 center-of-mass energy ($\sqrt{s}$) points between 2.2323 and 3.671 GeV, BESIII has achieved a measurement of the $R$ value with an accuracy down to the level of $2.6\%$ for $\sqrt{s} < 3.1$ GeV and $3.0\%$ for $\sqrt{s} > 3.1$ GeV. BESIII has also observed the $X(2600)$ resonance in radiative $J/ψ$ decay and the polarization of $D^0 \to ωϕ$ for the first time. The polarization of $D^0 \to ωϕ$ saturates with completely transverse polarization, which is inconsistent with the existing theoretical models. These results are useful in testing the predictions of the Standard Model. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2311_14279 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Highlights of recent BESIII results Prasad, Vindhyawasini High Energy Physics - Experiment High Energy Physics - Phenomenology This report highlights the recent BESIII results related to the measurement of the $R$ value, radiative decays of $J/ψ$ and the polarization of $D^0 \to ωϕ$ decay. BESIII, a symmetric electron-positron collider experiment, has collected a large data sample at several energy points in the tau-charm region, including the $J/ψ$ and $ψ(3770)$ resonances. Based on the data samples collected at 14 center-of-mass energy ($\sqrt{s}$) points between 2.2323 and 3.671 GeV, BESIII has achieved a measurement of the $R$ value with an accuracy down to the level of $2.6\%$ for $\sqrt{s} < 3.1$ GeV and $3.0\%$ for $\sqrt{s} > 3.1$ GeV. BESIII has also observed the $X(2600)$ resonance in radiative $J/ψ$ decay and the polarization of $D^0 \to ωϕ$ for the first time. The polarization of $D^0 \to ωϕ$ saturates with completely transverse polarization, which is inconsistent with the existing theoretical models. These results are useful in testing the predictions of the Standard Model. |
| title | Highlights of recent BESIII results |
| topic | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2311.14279 |