New measurement of D0 and D+ meson masses with the KEDR detector

TL;DR

This paper reports precise measurements of the D0 and D+ meson masses using the KEDR detector at VEPP-4M, providing updated values with statistical and systematic uncertainties.

Contribution

The study presents new, more precise measurements of D meson masses at the $\psi(3770)$ resonance, improving upon previous results.

Findings

Measured $M_{D^0}$ as 1865.100 MeV with uncertainties

Measured $M_{D^+}$ as 1869.560 MeV with uncertainties

Achieved improved precision over prior measurements

Abstract

Using the 4.9 pb$^{-1}$ statistics collected at the peak of the $\psi(3770)$ resonance with the KEDR detector at the VEPP-4M electron-positron collider, we measured the masses of the neutral and charged D mesons: $M_{D^0} = 1865.100 \pm 0.210 (stat) \pm 0.046 (syst) MeV,$ and $M_{D^+} = 1869.560 \pm 0.288 (stat) \pm 0.109 (syst) MeV$.