Search for massive neutrinos in π+ → e+ νe decay

被引：0

作者：

Ito, S. ^{[1
]}

Aguilar-Arevalo, A. ^{[2
]}

Aoki, M. ^{[1
]}

Blecher, M. ^{[3
]}

Britton, D. I. ^{[4
]}

Bryman, D. A. ^{[5
]}

Bruch, D. vom ^{[5
]}

Chen, S. ^{[6
]}

Comfort, J. ^{[7
]}

Cuen-Rochin, S. ^{[5
]}

Doria, L. ^{[8
]}

Gumplinger, P. ^{[8
]}

Hussein, A. ^{[9
]}

Igarashi, Y. ^{[10
]}

Kettell, S. ^{[11
]}

Kurchaninov, L. ^{[8
]}

Littenberg, L. ^{[11
]}

Malbrunot, C. ^{[5
,12
]}

Mischke, R. E. ^{[8
]}

Numao, T. ^{[8
]}

Protopopescu, D. ^{[4
]}

Sher, A. ^{[8
]}

Sullivan, T. ^{[5
]}

Vavilov, D. ^{[8
]}

机构：

[1] Osaka Univ, Toyonaka, Osaka 5600043, Japan

[2] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico

[3] Virginia Technol, Blacksburg, VA 24061 USA

[4] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

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

[6] Tsinghua Univ, Beijing 100084, Peoples R China

[7] Arizona State Univ, Tempe, AZ 85287 USA

[8] TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada

[9] Univ Northern British Columbia, Prince George, BC V2N 4Z9, Canada

[10] KEK, 1-1 Oho, Tsukuba, Ibaraki 3050801, Japan

[11] Brookhaven Natl Lab, Upton, NY 11973 USA

[12] CERN, CH-1211 Geneva 23, Switzerland

来源：

HYPERFINE INTERACTIONS | 2016年 / 238卷

基金：

加拿大自然科学与工程研究理事会; 高等学校博士学科点专项科研基金;

关键词：

Neutrino mixing; Pion decay; Weak interaction; Precision measurement;

D O I：

10.1007/s10751-016-1375-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The PIENU experiment aims to measure the branching ratio of the charged pion decay with precision of < 0.1 %. This measurement is much sensitive to search for massive neutrinos coupled to electrons in pi(+) -> e(+) nu(e) decay. The initial analysis was completed and the upper limit on the neutrino mixing parameter broken vertical bar U-ei broken vertical bar|(2) in the neutrino mass range of 0 to 55 MeV/c(2) was improved by a factor of 1.5, and the sensitivity for the mass range of 68 to 129 MeV/c(2) was improve by a factor of up to 4.

引用

页数：5

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