A source of antihydrogen for in-flight hyperfine spectroscopy

被引：134

作者：

Kuroda, N. ^{[1
]}

Ulmer, S. ^{[2
]}

Murtagh, D. J. ^{[3
]}

Van Gorp, S. ^{[3
]}

Nagata, Y. ^{[3
]}

Diermaier, M. ^{[4
]}

Federmann, S. ^{[5
]}

Leali, M. ^{[6
,7
]}

Malbrunot, C. ^{[4
]}

Mascagna, V. ^{[6
,7
]}

Massiczek, O. ^{[4
]}

Michishio, K. ^{[8
]}

Mizutani, T. ^{[1
]}

Mohri, A. ^{[3
]}

Nagahama, H. ^{[1
]}

Ohtsuka, M. ^{[1
]}

Radics, B. ^{[3
]}

Sakurai, S. ^{[9
]}

Sauerzopf, C. ^{[4
]}

Suzuki, K. ^{[4
]}

Tajima, M. ^{[1
]}

Torii, H. A. ^{[1
]}

Venturelli, L. ^{[6
,7
]}

Wuenschek, B. ^{[4
]}

Zmeskal, J. ^{[4
]}

Zurlo, N. ^{[6
]}

Higaki, H. ^{[9
]}

Kanai, Y. ^{[3
]}

Rizzini, E. Lodi ^{[6
,7
]}

Nagashima, Y. ^{[8
]}

Matsuda, Y. ^{[1
]}

Widmann, E. ^{[4
]}

Yamazaki, Y. ^{[1
,3
]}

机构：

[1] Univ Tokyo, Grad Sch Arts & Sci, Inst Phys, Tokyo 1538902, Japan

[2] RIKEN, Ulmer Initiat Res Unit, Saitama 3510198, Japan

[3] RIKEN, Atom Phys Lab, Saitama 3510198, Japan

[4] Osterreichische Akad Wissensch, Stefan Meyer Inst Subatomare Phys, A-1090 Vienna, Austria

[5] CERN, CH-1211 Geneva, Switzerland

[6] Univ Brescia, Dipartimento Ingn Informaz, I-25133 Brescia, Italy

[7] Ist Nazl Fis Nucl, Grp Collegato Brescia, I-25133 Brescia, Italy

[8] Tokyo Univ Sci, Dept Phys, Tokyo 1628601, Japan

[9] Hiroshima Univ, Grad Sch Adv Sci Matter, Hiroshima 7398530, Japan

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

基金：

欧洲研究理事会;

关键词：

CONFINEMENT;

D O I：

10.1038/ncomms4089

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Antihydrogen, a positron bound to an antiproton, is the simplest antiatom. Its counterpart-hydrogen-is one of the most precisely investigated and best understood systems in physics research. High-resolution comparisons of both systems provide sensitive tests of CPT symmetry, which is the most fundamental symmetry in the Standard Model of elementary particle physics. Any measured difference would point to CPT violation and thus to new physics. Here we report the development of an antihydrogen source using a cusp trap for in-flight spectroscopy. A total of 80 antihydrogen atoms are unambiguously detected 2.7 m downstream of the production region, where perturbing residual magnetic fields are small. This is a major step towards precision spectroscopy of the ground-state hyperfine splitting of antihydrogen using Rabi-like beam spectroscopy.

引用

页数：6

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