Measurement of the muon capture rate in hydrogen gas and determination of the Proton's Pseudoscalar coupling gP

被引：79
作者：
Andreev, V. A.
Banks, T. I.
Case, T. A.
Chitwood, D. B.
Clayton, S. M.
Crowe, K. M.
Deutsch, J.
Egger, J.
Freedman, S. J.
Ganzha, V. A.
Gorringe, T.
Gray, F. E.
Hertzog, D. W.
Hildebrandt, M.
Kammel, P. [1 ]
Kiburg, B.
Knaack, S.
Kravtsov, P. A.
Krivshich, A. G.
Lauss, B.
Lynch, K. L.
Maev, E. M.
Maev, O. E.
Mulhauser, F.
Oezben, C. S.
Petitjean, C.
Petrov, G. E.
Prieels, R.
Schapkin, G. N.
Semenchuk, G. G.
Soroka, M. A.
Tishchenko, V.
Vasilyev, A. A.
Vorobyov, A. A.
Vznuzdaev, M. E.
Winter, P.
机构：
[1] Petersburg Nucl Phys Inst, Gatchina 188350, Russia
[2] Univ Calif Berkeley, Berkeley, CA 94720 USA
[3] LBNL, Berkeley, CA 94720 USA
[4] Univ Illinois, Urbana, IL 61801 USA
[5] Univ Catholique Louvain, B-1348 Louvain, Belgium
[6] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
[7] Univ Kentucky, Lexington, KY 40506 USA
[8] Boston Univ, Boston, MA 02215 USA
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 03期
关键词：
CONSTANT; MOLECULE; NUCLEON;
D O I：
10.1103/PhysRevLett.99.032002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The rate of nuclear muon capture by the proton has been measured using a new technique based on a time projection chamber operating in ultraclean, deuterium-depleted hydrogen gas, which is key to avoiding uncertainties from muonic molecule formation. The capture rate from the hyperfine singlet ground state of the mu p atom was obtained from the difference between the mu(-) disappearance rate in hydrogen and the world average for the mu(+) decay rate, yielding Lambda(S)=725.0 +/- 17.4 s(-1), from which the induced pseudoscalar coupling of the nucleon, g(P)(q(2)=-0.88m(mu)(2))=7.3 +/- 1.1, is extracted.
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页数：5
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