Through a series of computer simulations, the team showed that antihydrogen atoms could be cooled to around 20 millikelvin, making the effort worthwhile. Currently, trapped antihydrogen atoms have ...

Antihydrogen – an atomic bound state of a positron and antiproton – was first produced at CERN towards the end of 1995. Over the past two years, physicists working on the ALPHA experiment have ...

Their most recent paper, published in Nature Physics, presents new measurements of the properties of antihydrogen's 1S–2S ...

If antihydrogen has a different hyperfine spectrum than hydrogen, then CPT symmetry is violated for electromagnetism, at distinct odds with the predictions of the Standard Model.

Antihydrogen spectrum indistinguishable from that of hydrogen It's a new, impressive experiment, but the results are exactly what we expected. Xaq Rzetelny – Dec 29, 2016 8:00 am ...

The hyperfine splitting of antihydrogen has been measured and is consistent with expectations for atomic hydrogen. Comparing precision measurements of hydrogen with equivalent measurements of ...

The Antihydrogen Laser Physics Apparatus (ALPHA) collaboration, an international team based at CERN, measured gravity’s impact on antimatter for the first time.

It takes a lot of care and attention, plus a significant investment of energy, to create even the simplest anti-atom, antihydrogen--which consists of one antiproton orbited by one positron. Granted, ...

After 335 runs of the experiment, mixing around 10 million antiprotons and 700 million positrons, only 38 of the antihydrogen atoms the team made were moving slowly enough to be trapped (Nature ...

If antihydrogen atoms can be studied in detail, as ALPHA’s latest result suggests, they may provide a powerful tool for investigating this preference. Hydrogen atoms consist of an electron ...

The ALPHA experiment performs such tests through spectroscopy of antihydrogen—that is, by measuring the frequencies of ...

An artist’s conceptual rendering of the antihydrogen atoms contained within the magnetic trap of the ALPHA-g apparatus. As the field strength at the top and bottom of the magnetic trap is ...