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Showing 1–19 of 19 results
Advanced filters: Author: M. Sameed Clear advanced filters

  • Antihydrogen studies are important in testing the fundamental principles of physics but producing antihydrogen in large amounts is challenging. Here the authors demonstrate an efficient and high-precision method for trapping and stacking antihydrogen by using controlled plasma.

    • M. Ahmadi
    • B. X. R. Alves
    • J. S. Wurtele
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-6

  • The extent of antibody protection against SARS-CoV-2 remains unclear. Here, using a cohort of 120 seroconverted individuals, the authors longitudinally characterize neutralization, Fc-function, and SARS-CoV-2 specific T cell responses, which they show to be prominent only in those subjects that elicited receptor-binding domain (RBD)-specific antibody titers above a certain threshold, suggesting that development of T cell responses to be related to anti-RBD Ab production.

    • Yannic C. Bartsch
    • Stephanie Fischinger
    • Galit Alter
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-8

  • The hyperfine splitting of antihydrogen has been measured and is consistent with expectations for atomic hydrogen.

    • M. Ahmadi
    • B. X. R. Alves
    • J. S. Wurtele
    ResearchOpen Access
    Nature
    Volume: 548, P: 66-69

  • Despite bringing great strengths and facing substantial health inequities, disabled people remain underserved by health research; addressing this requires multi-level actions spanning all areas of research.

    • Anna M. Anderson
    • Rachelle A. Martin
    • Gretl A. McHugh
    Comments & Opinion
    Nature Medicine
    Volume: 31, P: 1399-1403

  • Magnetically confined neutral antihydrogen atoms released in a gravity field were found to fall towards Earth like ordinary matter, in accordance with Einstein’s general theory of relativity.

    • E. K. Anderson
    • C. J. Baker
    • J. S. Wurtele
    ResearchOpen Access
    Nature
    Volume: 621, P: 716-722

  • The COVID-19 pandemic has highlighted the need for user-friendly diagnostic techniques. Here, the authors present SHINE, a streamlined and optimised Cas13-based method with accompanying smartphone app for visual diagnosis.

    • Jon Arizti-Sanz
    • Catherine A. Freije
    • Cameron Myhrvold
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-9

  • Positrons are key to the production of cold antihydrogen. Here the authors report the sympathetic cooling of positrons by interacting them with laser-cooled Be+ ions resulting in a three-fold reduction of the temperature of positrons for antihydrogen synthesis.

    • C. J. Baker
    • W. Bertsche
    • J. S. Wurtele
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-8

  • The successful laser cooling of trapped antihydrogen, the antimatter atom formed by an antiproton and a positron (anti-electron), is reported.

    • C. J. Baker
    • W. Bertsche
    • J. S. Wurtele
    ResearchOpen Access
    Nature
    Volume: 592, P: 35-42

  • The shape of the spectral line and the resonance frequency of the 1S–2S transition in antihydrogen agree very well with those of hydrogen.

    • M. Ahmadi
    • B. X. R. Alves
    • J. S. Wurtele
    ResearchOpen Access
    Nature
    Volume: 557, P: 71-75

  • Precision measurements of the 1S–2P transition in antihydrogen that take into account the standard Zeeman and hyperfine effects confirm the predictions of quantum electrodynamics.

    • M. Ahmadi
    • B. X. R. Alves
    • J. S. Wurtele
    Research
    Nature
    Volume: 578, P: 375-380

  • The 1S–2S transition in magnetically trapped atoms of antihydrogen is observed, and its frequency is shown to be consistent with that expected for hydrogen.

    • M. Ahmadi
    • B. X. R. Alves
    • J. S. Wurtele
    ResearchOpen Access
    Nature
    Volume: 541, P: 506-510

  • Stochastic acceleration applied to 1,000 trapped antihydrogen atoms yields a 20-fold reduction of the experimental upper bound on the magnitude of the charge of antihydrogen, which is expected to be charge neutral.

    • M. Ahmadi
    • M. Baquero-Ruiz
    • A. I. Zhmoginov
    ResearchOpen Access
    Nature
    Volume: 529, P: 373-376