New measurements of the mass of the K- meson
Denisov A. S., Zhelamkov A. V., Ivanov Yu. M., Lapina L. P., Levchenko P. M., Malakhov V. D., Petrunin A. A., Sergeev A. G., Smirnov A. I., Suvorov V. M., Fedin O. L.
The energy of the 4f-3d transition in the К ~2 С atom has been measured with the help of a Cauchois crystal diffraction spectrometer at the proton synchrotron of the Institute of High-Energy Physics. A new value has been found for the mass of К ~ meson: 493.6960 ± 0.0059 MeV. This figure is significantly different from the previously accepted value.