Status of the PIENU experiment

11th International Conference on Hyperons, Charm and Beauty Hadrons

Numao, T.^1 ; Aguilar-Arevalo, A.^2 ; Aoki, M.^3 ; Blecher, M.^4 ; Britton, D.I.^5 ; Bryman, D.A.^6 ; Vom Bruch, D.^6 ; Chen, S.^7 ; Comfort, J.^8 ; Cuen-Rochin, S.^6 ; Doria, L.^1 ; Gumplinger, P.^1 ; Hussein, A.^9 ; Igarashi, Y.^10 ; Ito, S.^3 ; Kettell, S.^11 ; Kurchaninov, L.^1 ; Littenberg, L.^11 ; Malbrunot, C.^6 ; Mischke, R.^1 ; Protopopescu, D.^5 ; Sher, A.^1 ; Sullivan, T.^6 ; Vavilov, D.^1

TRIUMF, 4004 Wesbrook Mall, Vancouver

BC

V6T 2A3, Canada^1

Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de Mexico, México, Mexico^2

Osaka University, Toyonaka, Osaka

560-0043, Japan^3

Virginia Tech., Blacksburg

VA

24061, United States^4

University of Glasgow, Glasgow, United Kingdom^5

University of British Columbia, Vancouver

BC

V6T 1Z1, Canada^6

Tsinghua University, Beijing

100084, China^7

Arizona State University, Tempe

AZ

85287, United States^8

University of Northern British Columbia, Prince George

BC

V2N 4Z9, Canada

(10) KEK, 1-1 Oho, Tsukuba-shi, Ibaraki

305-0801, Japan

(11) Brookhaven National Laboratory, Upton

NY

11973-5000, United States^9

关键词: Branching ratio;    Weak interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/556/1/012002/pdf
DOI  :  10.1088/1742-6596/556/1/012002

来源: IOP

【 摘 要 】

The branching ratio, Re/μΓ(π → eν + eνγ)/Γ(π → μν + μνγ), provides a sensitive test of muon-electron universality in weak interactions. The status of the PIENU experiment at TRIUMF, which aims to improve the precision of the Re/μmeasurement by a factor of > 5, is presented.