scholarly journals Detailed report of the MuLan measurement of the positive muon lifetime and determination of the Fermi constant

2013 ◽  
Vol 87 (5) ◽  
Author(s):  
V. Tishchenko ◽  
S. Battu ◽  
R. M. Carey ◽  
D. B. Chitwood ◽  
J. Crnkovic ◽  
...  
Keyword(s):  
Positive Muon ◽  
Detailed Report ◽  
Muon Lifetime

scholarly journals Improved Measurement of the Positive-Muon Lifetime and Determination of the Fermi Constant

2007 ◽  
Vol 99 (3) ◽  
Author(s):  
D. B. Chitwood ◽  
T. I. Banks ◽  
M. J. Barnes ◽  
S. Battu ◽  
R. M. Carey ◽  
...  
Keyword(s):  
Positive Muon ◽  
Muon Lifetime

scholarly journals Mulan: a part-per-million measurement of the muon lifetime and determination of the Fermi constant

2021 ◽  
Author(s):  
Rebecca Carey ◽  
Tim Gorringe ◽  
David Hertzog
Keyword(s):  
Magnetic Field ◽  
Quartz Crystal ◽  
Muon Beam ◽  
Positive Muon ◽  
Muon Capture ◽  
The Standard Model ◽  
Muon Lifetime ◽  
Surface Muon ◽  
Paul Scherrer

The part-per-million measurement of the positive muon lifetime and determination of the Fermi constant by the MuLan experiment at the Paul Scherrer Institute is reviewed. The experiment used an innovative, time-structured, surface muon beam and a near-4\piπ, finely-segmented, plastic scintillator positron detector. Two in-vacuum muon stopping targets were used: a ferromagnetic foil with a large internal magnetic field, and a quartz crystal in a moderate external magnetic field. The experiment acquired a dataset of 1.6 \times 10^{12}1.6×1012 positive muon decays and obtained a muon lifetime \tau_{\mu} = 2\, 196\, 980.3(2.2)τμ=2196980.3(2.2)~ps (1.0~ppm) and Fermi constant G_F = 1.166\, 378\, 7(6) \times 10^{-5}F=1.1663787(6)×10−5 GeV^{-2}−2 (0.5~ppm). The thirty-fold improvement in \tau_{\mu}τμ has proven valuable for precision measurements in nuclear muon capture and the commensurate improvement in G_FF has proven valuable for precision tests of the standard model.

scholarly journals Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant to Part-per-Million Precision

2011 ◽  
Vol 106 (4) ◽  
Author(s):  
D. M. Webber ◽  
V. Tishchenko ◽  
Q. Peng ◽  
S. Battu ◽  
R. M. Carey ◽  
...  
Keyword(s):  
Positive Muon ◽  
Muon Lifetime

Precise measurement of the positive muon lifetime at the RIKEN-RAL muon facility

2003 ◽  
Vol 29 (8) ◽  
pp. 2013-2015 ◽  
Author(s):  
D Tomono ◽  
S N Nakamura ◽  
Y Matsuda ◽  
M Iwasaki ◽  
G Mason ◽  
...  
Keyword(s):  
Precise Measurement ◽  
Positive Muon ◽  
Muon Facility ◽  
Muon Lifetime

scholarly journals On the endocranial cast of the adolescent sinanthropus skull

1933 ◽  
Vol 112 (776) ◽  
pp. 263-276 ◽  
Keyword(s):  
Present Report ◽  
Cranial Capacity ◽  
Detailed Report ◽  
Preliminary Trial ◽  
The Subject ◽  
Endocranial Volume

The cast to be described in this paper is that of the adolescent skull specimen from Locus E of the Choukoutien deposit, which has already been the subject of detailed report (Black, 1931). Earlier it was anticipated that the endocranial cast of both this specimen and that of the adult skull from Locus D would be described together, but as circumstances have retarded the work of restoration on the latter specimen, the present report will no longer be delayed. Cranial Capacity . Under this heading in the description of the skull ( loc. cit ., p. 45) it was estimated from the crude preliminary trial measurements that the endocranial volume of the restored specimen would be in excess of 1000 c. c. This prediction has, however, not been confirmed and the volume of the restored endocranial cast has now been determined with accuracy to be 964.4 ± 0.27 c. C. Since the accuracy of any determination of skull volume is largely dependent upon the method employed it may be of advantage to describe the technique by which the above result has been obtained.

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