Since the first trapped antihydrogen in 2010 [1] and observing its long lifetime in the 0.5 K deep neutral atom trap [2], experiments have been performed on the anti-atom resulting in the observation of resonant transitions between the hyperfine states of the ground state [3], experimental limits on the ratio of the gravitational mass to the inertial mass of antimatter and an experimental limit on the charge of antihydrogen [5].
We will give an overview of the ALPHA experiment [6] and present some of the results originating from recent experiments on trapped antihydrogen.
References
[1] G. B. Andresen et al. (ALPHA collaboration), Nature 468, 673 (2010).
[2] G. B. Andresen et al. (ALPHA collaboration), Nature Phys. 7, 558 (2011).
[3] C. Amole et al. (ALPHA collaboration), Nature 483, 439 (2012).
[4] C. Amole et al. (ALPHA collaboration), Nature Communications 4, 1785 (2013).
[5] C. Amole et al. (ALPHA collaboration), Nature Communications 5, 3955 (2014).
[6] C. Amole et al. (ALPHA collaboration), Nucl. Instr. and Meth. in Phys. Res. A 735 (2014) 319.
