High-Precision Measurement of the 19Ne Half-Life and Implications for Right-Handed Weak Currents

被引：27

作者：

Triambak, S. ^{[1
,2
]}

Finlay, P. ^{[3
]}

Sumithrarachchi, C. S. ^{[3
]}

Hackman, G. ^{[1
]}

Ball, G. C. ^{[1
]}

Garrett, P. E. ^{[3
]}

Svensson, C. E. ^{[3
]}

Cross, D. S. ^{[1
,4
]}

Garnsworthy, A. B. ^{[1
]}

Kshetri, R. ^{[1
,4
]}

Orce, J. N. ^{[1
,5
]}

Pearson, M. R. ^{[1
]}

Tardiff, E. R. ^{[1
]}

Al-Falou, H. ^{[1
]}

Austin, R. A. E. ^{[6
]}

Churchman, R. ^{[1
]}

Djongolov, M. K. ^{[1
]}

D'Entremont, R. ^{[6
]}

Kierans, C. ^{[8
]}

Milovanovic, L. ^{[7
]}

O'Hagan, S. ^{[9
]}

Reeve, S. ^{[6
]}

Sjue, S. K. L. ^{[1
]}

Williams, S. J. ^{[1
]}

机构：

[1] TRIUMF, Vancouver, BC V6T 2A3, Canada

[2] Univ Delhi, Dept Phys & Astrophys, Delhi 100007, India

[3] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada

[4] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada

[5] Univ Western Cape, Dept Phys, ZA-7535 Bellville, South Africa

[6] St Marys Univ, Dept Phys & Astron, Halifax, NS B3H 3C3, Canada

[7] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V4T 1Z1, Canada

[8] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

[9] Univ Alberta, Dept Sci, Camrose, AB T4V 2R3, Canada

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

RIGHT-SYMMETRY-BREAKING; NUCLEAR BETA-DECAY; TESTS;

D O I：

10.1103/PhysRevLett.109.042301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a precise determination of the Ne-19 half-life to be T-1/2 = 2 17: 262 +/- 0: 007 s. This result disagrees with the most recent precision measurements and is important for placing bounds on predicted right-handed interactions that are absent in the current standard model. We are able to identify and disentangle two competing systematic effects that influence the accuracy of such measurements. Our findings prompt a reassessment of results from previous high-precision lifetime measurements that used similar equipment and methods.

引用

页数：5

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