Torsten Lippert

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More than 99% of the mass of the visible universe is made up of protons and neutrons. Both particles are much heavier than their quark and gluon constituents, and the Standard Model of particle physics should explain this difference. We present a full ab initio calculation of the masses of protons, neutrons, and other light hadrons, using lattice quantum(More)
The existence and stability of atoms rely on the fact that neutrons are more massive than protons. The measured mass difference is only 0.14% of the average of the two masses. A slightly smaller or larger value would have led to a dramatically different universe. Here, we show that this difference results from the competition between electromagnetic and(More)
A two-channel high-speed digitizer is extensively characterized in the frequency range of 50 Hz to 1 MHz. The measurements involve ac flatness, phase, linearity, input impedance and the effects of dc offsets, temperature, and internal self-calibration routine. The overall uncertainty contribution of the digitiser in wideband power measurements under(More)
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