Highlights of recent BESIII results

Abstract

This report highlights the recent BESIII results related to the measurement of the $R$ value, radiative decays of $J/\psi$ and the polarization of $D^0\to \omega \varphi$ 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 $J/\psi$ and $\psi (3770)$ 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 $J/\psi$ decay and the polarization of $D^0\to \omega \varphi$ for the first time. The polarization of $D^0\to \omega \varphi$ 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.

arXiv comment10 pages, 6 figures, accepted by International Journal of Modern Physics A: (Selected Papers: ICNFP 2022)

References in corpus (26)

• The anomalous magnetic moment of the muon in the Standard Model
• Glueball Spectrum and Matrix Elements on Anisotropic Lattices
• Future Physics Programme of BESIII
• Exotic Decays of the 125 GeV Higgs Boson
• Observation of a resonance X(1835) in J/ψ--> γπ^+ π^- η^{\prime}
• Confirmation of the X(1835) and observation of the resonances X(2120) and X(2370) in J/psi->gamma pi^+pi^-eta'
• Adler Function, Sum Rules and Crewther Relation of Order O(alpha_s^4): the Singlet Case
• Probing NMSSM Scenarios with Minimal Fine-Tuning by Searching for Decays of the Upsilon to a Light CP-Odd Higgs Boson
• X(1835) as the Lowest Mass Pseudoscalar Glueball and Proton Spin Problem
• Decay of the pseudoscalar glueball into scalar and pseudoscalar mesons
• Observation and Spin-Parity Determination of the $X(1835)$ in $J/\psi \to \gamma K_S^0{K}_S^0\eta$
• (A)symmetries of weak decays at and near the kinematic endpoint
• X(1835): A Natural Candidate of ${\eta }^{\prime }$'s Second Radial Excitation
• X(1835): A Possible Baryonium?
• Long-Distance Contributions to D^0-D^0bar Mixing Parameters
• Precise measurement of $R_{\text{uds}}$ and $R$ between 1.84 and 3.72 GeV at the KEDR detector
• Measurement of the Cross Section for $e^{+}{e}^{-}\to$ hadrons at Energies from 2.2324 to 3.6710 GeV
• Observation of a state $X(2600)$ in the ${\pi }^{+}{\pi }^{-}{\eta }^{\prime }$ system in the process $J/\psi \to \gamma {\pi }^{+}{\pi }^{-}{\eta }^{\prime }$
• Study of the D^0 \to pi^-pi^+pi^-pi^+ decay
• The Hadronic Contribution to the Muon Anomalous Magnetic Moment and to the Running Electromagnetic Fine Structure Constant at MZ - Overview and Latest Results
• Search for a light CP-odd Higgs boson in the radiative decays of J/psi
• Helicity and partial wave amplitude analysis of D -> K^* ρdecay
• Search for a $CP$-odd light Higgs boson in $J/\psi \to \gamma A^0$
• Observation of $J/\psi$ Electromagnetic Dalitz Decays to $X(1835)$, $X(2120)$ and $X(2370)$
• First measurement of polarizations in the decay $D^0\to \omega \varphi$
• R-values in Low Energy e^+e^- Annihilation