Improved measurement of the positive-muon lifetime and determination of the Fermi constant

Chitwood, Cenap; BANKS, T.; BARNES, M.; BATTU, S.; CAREY, R.; CHEEKATMALLA, S.; CLAYTON, S.; CRNKOVIC, J.; CROWE, K.; DEBEVEC, P.; DHAMIJA, S.; EARLE, W.; GAFAROV, A.; GIOVANETTI, K.; GORRINGE, T.; GRAY, F.; HANCE, M.; HERTZOG, D.; HARE, M.; KAMMEL, P.; KIBURG, B.; KUNKLE, J.; LAUSS, B.; LOGASHENKO, I.; LYNCH, K.; MCNABB, R.; MILLER, J.; MULHAUSER, F.; ONDERWATER, C.; OEZBEN, C.; PENG, Q.; POLLY, C.; RATH, S.; ROBERTS, B.; TISHCHENKO, V.; WAIT, G.; WASSERMAN, J.; WEBBER, D.; WINTER, P.; ZOLNIERCZUK, P.

doi:10.1103/physrevlett.99.032001

Improved measurement of the positive-muon lifetime and determination of the Fermi constant

Atıf İçin Kopyala

Chitwood D. B., BANKS T. I., BARNES M. J., BATTU S., CAREY R. M., CHEEKATMALLA S., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.99, sa.3, 2007 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 99 Sayı: 3
Basım Tarihi: 2007
Doi Numarası: 10.1103/physrevlett.99.032001
Dergi Adı: PHYSICAL REVIEW LETTERS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

The mean life of the positive muon has been measured to a precision of 11 ppm using a low-energy, pulsed muon beam stopped in a ferromagnetic target, which was surrounded by a scintillator detector array. The result, tau(mu)=2.197013(24) mu s, is in excellent agreement with the previous world average. The new world average tau(mu)=2.197019(21) mu s determines the Fermi constant G(F)=1.166371(6)x10(-5) GeV-2 (5 ppm). Additionally, the precision measurement of the positive-muon lifetime is needed to determine the nucleon pseudoscalar coupling g(P).