Laser spectroscopy of the Lamb shift in muonic hydrogen

The muonic hydrogen atom in the 2s state provides the possibility of achiev ing high precision laser spectroscopy experiments from which a high precisi on value of the proton radius can be deduced. This will ultimately allow an increased precision in the test of QED in bound systems. Important progres s has been made in recent years in the ability to stop muons in a low press ure gas target and in the understanding of the 2s-metastability in muonic h ydrogen. As a consequence the 2s-2p laser spectroscopy experiment is now fe asible and we present here the basic experimental concept considered by our collaboration.