Measurement of the weak neutral current excitation 12C(νμνμ)12C*(1+,1;15.1 MeV) at Eνμ=29.8 MeV

被引：63

作者：

Armbruster, B

Blair, I

Bodmann, BA

Booth, NE

Drexlin, G

Eberhard, V

Edgington, JA

Eichner, C

Eitel, K

Finckh, E

Gemmeke, H

Hossl, J

Jannakos, T

Junger, P

Kleifges, M

Kleinfeller, J

Kretschmer, W

Maschuw, R

Oehler, C

Plischke, P

Rapp, J

Ruf, C

Seligmann, B

Steidl, M

Stumm, O

Wolf, J

Zeitnitz, B

机构：

[1] Forschungszentrum Karlsruhe, Inst Kernphys 1, D-76021 Karlsruhe, Germany

[2] Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany

[3] Univ London Queen Mary & Westfield Coll, Dept Phys, London E1 4NS, England

[4] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[5] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany

[6] Univ Bonn, Inst Strahlen & Kernphys, D-53115 Bonn, Germany

来源：

PHYSICS LETTERS B | 1998年 / 423卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(98)00087-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The weak neutral current reaction C-12(nu(mu), nu(mu)')C-12* (1(+),1; 15.1 MeV) has been observed for the first time in the KARMEN experiment. Neutrino events were separated from background using two different analysis methods. The measured cross section sigma(NC) = (3.2 +/- 0.5(stat.) +/- 0.4(syst.)) x 10(-42) cm(2) for monoenergetic nu(mu) from pi(+)-decay at rest is in good agreement with the standard model, the isovector-axialvector coupling constant of weak hadronic current deduced from this experiment is \beta\ = 1.11 +/- 0.13. (C) 1998 Elsevier Science B.V.

引用

页码：15 / 20

页数：6

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