Precision Measurement of $D_s^{\ast +}$-$D_s^{+}$ Mass Difference

Abstract

We measure the mass difference between $D_s^{\ast +}$ and $D_s^{+}$, $\Delta m_s$, using the decay chain $D_s^{\ast +}\to D_s^{+}(\to K^{+}{K}^{-}{\pi }^{+}){\pi }^0$, utilizing $e^{+}{e}^{-}$ annihilation data corresponding to an integrated luminosity of 3.19 fb${}^{-1}$ collected at a center-of-mass energy of 4.178 GeV with the BESIII detector. The measured value of $\Delta m_s=[144201.9\pm 44.2(stat.)\pm 29.9(syst.)\pm 15.0(\mathrm{PDG})]$ keV/$c^2$ is about seven times more precise than the current Particle Data Group average, where the last uncertainty is from the Particle Data Group average of the $D^{\ast +}-D^{+}$ mass difference.

References in corpus (15)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Kernel Estimation in High-Energy Physics
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Observation of a near-threshold structure in the $K^{+}$ recoil-mass spectra in $e^{+}{e}^{-}\to K^{+}(D_s^{-}{D}^{\ast 0}+D_s^{\ast -}{D}^0)$
• Prediction of the $D_s^{\ast }$ width from a calculation of its radiative decay in full lattice QCD
• Observation of the Isospin-Violating Decay $D_s^{\ast +}\to D_s^{+}{\pi }^0$
• Evidence for a neutral near-threshold structure in the $K_{\mathrm{S}}^0$ recoil-mass spectra in $e^{+}{e}^{-}\to K_{\mathrm{S}}^0{D}_s^{+}{D}^{\ast -}$ and $e^{+}{e}^{-}\to K_{\mathrm{S}}^0{D}_s^{\ast +}{D}^{-}$
• Strong and Electromagnetic Mass Splittings in Heavy Mesons
• Status of isospin splittings in mesons and baryons
• Amplitude analysis of $D_s^{+}\to {\pi }^{+}{\pi }^{-}{\pi }^{+}$
• Spectroscopy of excited charmed mesons
• Measurement of the $D^{\ast }(2010{)}^{+}-D^{+}$ mass difference
• First exclusive reconstruction of the B${}^{\ast +}$, B${}^{\ast 0}$, and B${}_{\text{s}}^{\ast 0}$ mesons and precise measurement of their masses