1.
|
In-Beam Hyperfine Spectroscopy of Antihydrogen, Hydrogen, and Deuterium
/ Widmann, E. (Stefan Meyer Inst. Subatomare Phys.)
/ASACUSA Collaboration
The ASACUSA collaboration is developing a polarized beam of antihydrogen atoms to precisely determine the ground-state hyperfine structure for studies of CPT and Lorentz invariance. Using a beam of ordinary hydrogen, measurements of both the $\sigma$ and $\pi$-transition have been performed, investigating orientation-dependent SME coefficients. [...]
arXiv:2212.13083.-
2023 - 5 p.
- Published in : 10.1142/9789811275388_0008
Fulltext: PDF; External link: Preprint
In : 9th Meeting on CPT and Lorentz Symmetry, Bloomington, IN, United States, 17 - 26 May 2022, pp.34-38
|
|
2.
|
|
3.
|
|
4.
|
In-beam measurement of the hydrogen hyperfine splitting - towards antihydrogen spectroscopy
/ Diermaier, M. (Stefan Meyer Inst. Subatomare Phys.) ; Jepsen, C.B. (CERN) ; Kolbinger, B. (Stefan Meyer Inst. Subatomare Phys.) ; Malbrunot, C. (CERN ; Stefan Meyer Inst. Subatomare Phys.) ; Massiczek, O. (Stefan Meyer Inst. Subatomare Phys.) ; Sauerzopf, C. (Stefan Meyer Inst. Subatomare Phys.) ; Simon, M.C. (Stefan Meyer Inst. Subatomare Phys.) ; Zmeskal, J. (Stefan Meyer Inst. Subatomare Phys.) ; Widmann, E. (Stefan Meyer Inst. Subatomare Phys.)
/Asacusa AD-3 collaboration
Antihydrogen, the lightest atom consisting purely of antimatter, is an ideal laboratory to study the CPT symmetry by comparison to hydrogen. With respect to absolute precision, transitions within the ground-state hyperfine structure (GS-HFS) are most appealing by virtue of their small energy separation. [...]
arXiv:1610.06392; CERN-EP-2016-268.-
Geneva : CERN, 2017 - 10 p.
- Published in : Nature Commun. 8 (2017) 5749
Fulltext: PDF; External link: Preprint
|
|
5.
|
|
6.
|
Measurement of the ground-state hyperfine splitting of antihydrogen
/ Juhász, B (Stefan Meyer Inst. Subatomare Phys.) ; Widmann, E (Stefan Meyer Inst. Subatomare Phys.) ; Federmann, S (Stefan Meyer Inst. Subatomare Phys. ; CERN)
The ASACUSA collaboration at the Antiproton Decelerator of CERN is planning to measure the ground-state hyperfine splitting of antihydrogen using an atomic beam line, consisting of a cusp trap as a source of partially polarized antihydrogen atoms, a radiofrequency spin-flip cavity, a superconducting sextupole magnet as spin analyser, and an antihydrogen detector. This will be a measurement of the antiproton magnetic moment, and also a test of the CPT invariance. [...]
2011
- Published in : J. Phys.: Conf. Ser. 335 (2011) 012059
In : Symposium on Prospects in the Physics of Discrete Symmetries, Rome, Italy, 6 - 11 Dec 2010, pp.012059
|
|
7.
|
The ASACUSA CUSP: an antihydrogen experiment
/ Kuroda, N (Tokyo U., Komaba) ; Ulmer, S (Wako, RIKEN) ; Murtagh, D J (Wako, RIKEN) ; Gorp, S (Wako, RIKEN) ; Nagata, Y (Wako, RIKEN ; Tokyo U. of Agric. Tech.) ; Diermaier, M (Stefan Meyer Inst. Subatomare Phys.) ; Federmann, S (CERN) ; Leali, M (INFN, Brescia ; Brescia U.) ; Malbrunot, C (CERN) ; Mascagna, V (INFN, Brescia ; Brescia U.) et al.
In order to test CPT symmetry between antihydrogen and its counterpart hydrogen, the ASACUSA collaboration plans to perform high precision microwave spectroscopy of ground-state hyperfine splitting of antihydrogen atom in-flight. We have developed an apparatus (“cusp trap”) which consists of a superconducting anti-Helmholtz coil and multiple ring electrodes. [...]
2015 - 8 p.
- Published in : Hyperfine Interact. 235 (2015) 13-20
|
|
8.
|
The ASACUSA antihydrogen and hydrogen program : results and prospects
/ Malbrunot, C. (CERN ; Stefan Meyer Inst. Subatomare Phys.) ; Amsler, C. (Stefan Meyer Inst. Subatomare Phys.) ; Arguedas Cuendi, S. (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, H. (Nishina Ctr., RIKEN) ; Dupre, P. (Nishina Ctr., RIKEN) ; Fleck, M. (Stefan Meyer Inst. Subatomare Phys.) ; Higaki, H. (ADSM, Hiroshima) ; Kanai, Y. (Nishina Ctr., RIKEN) ; Kolbinger, B. (Stefan Meyer Inst. Subatomare Phys.) ; Kuroda, N. (Tokyo U., Komaba) et al.
The goal of the ASACUSA-CUSP collaboration at the Antiproton Decelerator of CERN is to measure the ground-state hyperfine splitting of antihydrogen using an atomic spectroscopy beamline. A milestone was achieved in 2012 through the detection of 80 antihydrogen atoms 2.7 meters away from their production region. [...]
arXiv:1710.03288.-
2018-03-28 - 16 p.
- Published in : Philos. Trans. R. Soc. Lond. 376 (2018) 20170273
Fulltext: arXiv:1710.03288 - PDF; 20170273.full - PDF;
In : Antiproton Physics in the ELENA Era : Theo Murphy meeting, Newport Pagnell, Buckinghamshire, UK, 4 - 5 Sep 2017, pp.20170273
|
|
9.
|
Hyperfine structure measurements of antiprotonic helium and antihydrogen
/ Widmann, Eberhard (Tokyo U.) ; Eades, John (CERN) ; Hayano, Ryugo S. (Tokyo U.) ; Hori, Masaki (CERN) ; Horvath, Dezso (Budapest, RMKI) ; Ishikawa, Takashi (Tokyo U.) ; Juhasz, Bertalan (U. Debrecen, Inst. Phys.) ; Sakaguchi, Jun (Tokyo U.) ; Torii, Hiroyuki A. (Tokyo U.) ; Yamaguchi, Hidetoshi (Tokyo U.) et al.
This paper describes measurements of the hyperfine structure of two antiprotonic atoms that are planned at the Antiproton Decelerator (AD) at CERN. The first part deals with antiprotonic helium, a three-body system of alpha-particle, antiproton and electron that was previously studied at LEAR. [...]
nucl-ex/0102002.-
Berlin Heidelberg : Springer, 2001 - 15 p.
- Published in : 10.1007/3-540-45395-4_36
External link: Full chapter text
In : Hydrogen Atom II: 2nd Symposium on Precise Physics of Simple Atomic Systems, Castiglione della Pescaia, Italy, 1 - 3 Jun 2000
The Hydrogen Atom, Castiglione della Pescaia, Italy, 1 - 3 Jun 2000, pp.528
|
|
10.
|
CPT and Lorentz symmetry tests with hydrogen using a novel in-beam hyperfine spectroscopy method applicable to antihydrogen experiments
/ Nowak, Lilian ; Malbrunot, Chloé ; Simon, Martin C. ; Amsler, Claude ; Arguedas Cuendis, Sergio ; Lahs, Sebastian ; Lanz, Andreas ; Nanda, Amit ; Wiesinger, Markus ; Wolz, Tim et al.
/Asacusa AD-3
We present a Rabi-type measurement of two ground-state hydrogen hyperfine transitions performed in two opposite external magnetic field directions. This puts first constraints at the level of 2.3 × 10^{−21} GeV on a set of coefficients of the Standard Model Extension, which were not measured by previous experiments. [...]
CERN-EP-2024-089.-
Geneva : CERN, 2024 - 9.
Draft (restricted): PDF; Fulltext: PDF;
|
|