@article {86,
	title = {Efficient antihydrogen detection in antimatter physics by deep learning},
	journal = {Journal of Physics Communications},
	volume = {1},
	year = {2017},
	pages = {025001},
	abstract = {Antihydrogen is at the forefront of antimatter research at the CERN Antiproton Decelerator. Experiments aiming to test the fundamental CPT symmetry and antigravity effects require the efficient detection of antihydrogen annihilation events, which is performed using highly granular tracking detectors installed around an antimatter trap. Improving the efficiency of the antihydrogen annihilation detection plays a central role in the final sensitivity of the experiments. We propose deep learning as a novel technique to analyze antihydrogen annihilation data, and compare its performance with a traditional track and vertex reconstruction method. We report that the deep learning approach yields significant improvement, tripling event coverage while simultaneously improving performance in terms of AUC by 5\%.},
	url = {http://stacks.iop.org/2399-6528/1/i=2/a=025001},
	author = {P Sadowski and B Radics and Ananya and Y Yamazaki and P Baldi}
}
@article {73,
	title = {Antihydrogen level population evolution: impact of positron plasma length},
	journal = {Journal of Physics B: Atomic, Molecular and Optical Physics},
	volume = {49},
	year = {2016},
	pages = {064007},
	abstract = {Antihydrogen is produced by mixing an antiproton and a positron plasma in a cryogenic electromagnetic trap. The dominant antihydrogen formation mechanism is three-body recombination, while the subsequent level population evolution is governed by various processes, mainly collisional (de)excitation, ionisation and radiative decay. In this work the impact of various positron plasma lengths on the level population evolution is investigated. The main interest is the ground-state antihydrogen atom yield. It is found that the ground state level population shows different power-law behaviors at short or longer positron plasma lengths.},
	url = {http://stacks.iop.org/0953-4075/49/i=6/a=064007},
	author = {B Radics and Y Yamazaki}
}
@article {71,
	title = {Towards a precise measurement of the antihydrogen ground state hyperfine splitting in a beam: the case of in-flight radiative decays},
	journal = {Journal of Physics B: Atomic, Molecular and Optical Physics},
	volume = {48},
	year = {2015},
	month = {29/07/2015},
	pages = {184001},
	abstract = {<p>The ASACUSA antihydrogen setup at the CERN Antiproton Decelerator (AD) consists of an antihydrogen source (cusp magnet coupled to a positron source and an antiproton catching magnet) followed by a spectrometer beamline. After production in the cusp, the antihydrogen atoms decay while they escape the trap leading to changes in their effective magnetic moment which in turn affect their trajectories in the beamline. Those sequential decays in the presence of a varying magnetic field strength from their production point in the cusp to their detection at the end of the spectrometer line can in principle greatly affect the prospects for a precision measurement of the antihydrogen hyperfine splitting given the so-far relatively low number of available anti-atoms. The impact of the antihydrogen decay in this context has for the first time been simulated. The implementation of atomic radiative decay has been done in Geant4 to extend the particle tracking capabilities originally embedded in Geant4 to excited atoms, and to allow studies of the effect of dynamic atomic properties on trajectories. This new tool thus allows the study of particle{\textendash}matter interaction via the Geant4 toolkit while properly taking into account the atomic nature of the object under study. The implementation as well as impacts on the experimental sensitivity for antihydrogen spectroscopy are discussed in this paper.</p>
},
	keywords = {Antihydrogen, ground state hyperfine splitting measurement, radiative decay},
	url = {http://stacks.iop.org/0953-4075/48/i=18/a=184001},
	author = {R Lundmark and C Malbrunot and Y Nagata and B Radics and C Sauerzopf and E Widmann}
}
