Measurement of Muon Capture on the Proton to 1% Precision and Determination of the Pseudoscalar Coupling gP

被引：52

作者：

Andreev, V. A. ^{[1
]}

Banks, T. I. ^{[2
,3
]}

Carey, R. M. ^{[4
]}

Case, T. A. ^{[2
,3
]}

Clayton, S. M. ^{[5
]}

Crowe, K. M. ^{[2
,3
]}

Deutsch, J. ^{[6
]}

Egger, J. ^{[7
]}

Freedman, S. J. ^{[2
,3
]}

Ganzha, V. A. ^{[1
]}

Gorringe, T. ^{[8
]}

Gray, F. E. ^{[2
,3
,9
]}

Hertzog, D. W. ^{[5
,10
]}

Hildebrandt, M. ^{[7
]}

Kammel, P. ^{[5
,10
]}

Kiburg, B. ^{[5
,10
]}

Knaack, S. ^{[5
]}

Kravtsov, P. A. ^{[1
]}

Krivshich, A. G. ^{[1
]}

Lauss, B. ^{[7
]}

Lynch, K. R. ^{[4
]}

Maev, E. M. ^{[1
]}

Maev, O. E. ^{[1
]}

Mulhauser, F. ^{[5
,7
]}

Petitjean, C. ^{[7
]}

Petrov, G. E. ^{[1
]}

Prieels, R. ^{[6
]}

Schapkin, G. N. ^{[1
]}

Semenchuk, G. G. ^{[1
]}

Soroka, M. A. ^{[1
]}

Tishchenko, V. ^{[8
]}

Vasilyev, A. A. ^{[1
]}

Vorobyov, A. A. ^{[1
]}

Vznuzdaev, M. E. ^{[1
]}

Winter, P. ^{[5
,10
]}

机构：

[1] Petersburg Nucl Phys Inst, Gatchina 188350, Russia

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] LBNL, Berkeley, CA 94720 USA

[4] Boston Univ, Dept Phys, Boston, MA 02215 USA

[5] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[6] Catholic Univ Louvain, Inst Nucl Phys, B-1348 Louvain, Belgium

[7] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[8] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[9] Regis Univ, Dept Phys & Computat Sci, Denver, CO 80221 USA

[10] Univ Washington, Dept Phys, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 01期

基金：

美国国家科学基金会;

关键词：

HYDROGEN; MOLECULE;

D O I：

10.1103/PhysRevLett.110.012504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The MuCap experiment at the Paul Scherrer Institute has measured the rate Lambda(S) of muon capture from the singlet state of the muonic hydrogen atom to a precision of 1%. A muon beam was stopped in a time projection chamber filled with 10-bar, ultrapure hydrogen gas. Cylindrical wire chambers and a segmented scintillator barrel detected electrons from muon decay. Lambda(S) is determined from the difference between the mu(-) disappearance rate in hydrogen and the free muon decay rate. The result is based on the analysis of 1.2 x 10(10) mu(-) decays, from which we extract the capture rate Lambda(S) = (714.9 +/- 5.4(stat) +/- 5.1(syst)) s(-1) and derive the proton's pseudoscalar coupling g(P)(q(0)(2) = -0.88m(mu)(2)) = 8.06 +/- 0.55. DOI: 10.1103/PhysRevLett.110.012504

引用

页数：5

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