Present Status of Spectroscopy of the Hyperfine Structure and Repolarization of Muonic Helium Atoms at J-PARC

被引：1

作者：

Fukumura, Seiso ^{[1
,7
]}

Strasser, Patrick ^{[2
]}

Fushihara, Mahiro ^{[1
]}

Goto, Yu ^{[1
]}

Ino, Takashi ^{[2
]}

Iwai, Ryoto ^{[2
]}

Kanda, Sohtaro ^{[2
]}

Kawamura, Shiori ^{[1
]}

Kitaguchi, Masaaki ^{[1
,3
]}

Nishimura, Shoichiro ^{[2
]}

Oku, Takayuki ^{[4
,5
]}

Okudaira, Takuya ^{[1
]}

Shimizu, Hirohiko M. ^{[1
]}

Shimomura, Koichiro ^{[2
]}

Tada, Hiroki ^{[1
]}

Torii, Hiroyuki A. ^{[6
]}

机构：

[1] Nagoya Univ, Dept Phys, Furo Cho,Chikusa Ku, Nagoya 4648601, Japan

[2] High Energy Accelerator Res Org KEK, 1-1 Oho, Tsukuba, Ibaraki 3050801, Japan

[3] Nagoya Univ, Kobayashi Maskawa Inst, Furo Cho,Chikusa Ku, Nagoya 4648601, Japan

[4] Japan Atom Energy Agcy JAEA, Adv Sci Res Ctr, 2-4 Shirane Shirakata, Ibaraki 3191195, Japan

[5] Ibaraki Univ, Dept Phys, Ibaraki 3108512, Japan

[6] Univ Tokyo, Sch Sci, 7-3-1 Hongo, Tokyo 1130033, Japan

[7] Niigata Univ, Dept Phys, 8050 Ikarashi 2-Cho,Nishi Ku, Niigata 9502181, Japan

来源：

PHYSICS | 2024年 / 6卷 / 02期

关键词：

muon; muonic atom; spectroscopy; bound-state QED; CPT invariance; fundamental constants; precision experiments; STRUCTURE INTERVAL; PRECISION-MEASUREMENT; GROUND-STATE; DEPOLARIZATION; CAPTURE;

D O I：

10.3390/physics6020054

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The mass m mu- of the negative muon is one of the parameters of the elementary particle Standard Model and it allows us to verify the CPT (charge-parity-time) symmetry theorem by comparing m mu- value with the mass m mu+ of the positive muon. However, the experimental determination precision of m mu- is 3.1ppm, which is an order of magnitude lower than the determination precision of m mu+ at 120ppb. The authors aim to determine m mu- and the magnetic moment mu mu- with a precision of O(10ppb) through spectroscopy of the hyperfine structure (HFS) of muonic helium-4 atom (4He mu-e-) under high magnetic fields. He4 mu-e- is an exotic atom where one of the two electrons of the He4 atom is replaced by a negative muon. To achieve the goal, it is necessary to determine the HFS of He4 mu-e- with a precision of O(1ppb). This paper describes the determination procedure of the HFS of He4 mu-e- in weak magnetic fields reported recently, and the work towards achieving the goal of higher precision measurement.

引用

页码：877 / 890

页数：14

共 14 条

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