Measurement of the muon decay parameter δ -: art. no. 071101

被引：38

作者：

Gaponenko, A ^{[1
]}

Bayes, R

Davydov, YI

Depommier, P

Doornbos, J

Faszer, W

Fujiwara, MC

Gagliardi, CA

Gill, DR

Green, P

Gumplinger, P

Hasinoff, MD

Henderson, RS

Hu, J

Jamieson, B

Kitching, P

Koetke, DD

Krushinsky, AA

Lachin, YY

Macdonald, JA

MacDonald, RP

Marshall, GM

Mathie, EL

Miasoedov, LV

Mischke, RE

Musser, JR

Nord, PM

Nozar, M

Olchanski, K

Olin, A

Openshaw, R

Porcelli, TA

Poutissou, JM

Poutissou, R

Quraan, MA

Rodning, NL

Selivanov, V

Sheffer, G

Shin, B

Sobratee, F

Stanislaus, TDS

Tacik, R

Torokhov, VD

Tribble, RE

Vasiliev, MA

Wright, DH

机构：

[1] Univ Alberta, Edmonton, AB T6G 2J1, Canada

[2] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada

[3] IV Kurchatov Atom Energy Inst, Moscow 123182, Russia

[4] Univ Montreal, Montreal, PQ H3C 3J7, Canada

[5] Univ Regina, Regina, SK S4S 0A2, Canada

[6] Texas A&M Univ, College Stn, TX 77843 USA

[7] Univ Victoria, TRIUMF, Victoria, BC, Canada

[8] IV Kurchatov Atom Energy Inst, TRIUMF, Moscow, Russia

[9] Univ Saskatchewan, TRIUMF, Saskatoon, SK, Canada

[10] Valparaiso Univ, Valparaiso, IN 46383 USA

来源：

PHYSICAL REVIEW D | 2005年 / 71卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.71.071101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The muon decay parameter delta has been measured by the TWIST collaboration. We find delta=0.74964 +/- 0.00066(stat.)+/- 0.00112(syst.), consistent with the standard model value of 3/4. This result implies that the product P(mu)xi of the muon polarization in pion decay, P-mu, and the muon decay parameter xi falls within the 90% confidence interval 0.9960 < P(mu)xi <=xi < 1.0040. It also has implications for left-right-symmetric and other extensions of the standard model.

引用

页码：1 / 5

页数：5

共 23 条

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