Publications (15)
The T2K Experiment
T2K Collaboration, K. Abe, N. Abgrall +520
The T2K experiment is a long-baseline neutrino oscillation experiment. Its main goal is to measure the last unknown lepton sector mixing angle θ_{13} by observing ν_e appearance…
A search for two body muon decay signals
R. Bayes, J. Bueno, Yu. I. Davydov +28
Lepton family number violation is tested by searching for decays among the 5.8 positive muon decay events analyzed by the TWIST collaboration. Limits…
Precise measurement of parity violation in polarized muon decay
TWIST Collaboration, J. F. Bueno, R. Bayes +28
We present a new high precision measurement of parity violation in the weak interaction, using polarized muon decay. The TWIST collaboration has measured , where $P_μ^υ
Precision planar drift chambers and cradle for the TWIST muon decay spectrometer
R. S. Henderson, Yu. I. Davydov, W. Faszer +9
To measure the muon decay parameters with high accuracy, we require an array of precision drift detector layers whose relative position is known with very high accuracy. This artic…
Time expansion chamber system for characterization of TWIST low energy muon beams
J. Hu, G. Sheffer, Yu. I. Davydov +10
A low mass time expansion chamber (TEC) has been developed to measure distributions of position and angle of the TRIUMF low energy surface muon beam used for the TWIST experiment.…
Measurement of two-halo neutron transfer reaction p(Li,Li)t at 3 MeV
I. Tanihata, M. Alcorta, D. Bandyopadhyay +23
The p(\nuc{11}{Li},\nuc{9}{Li})t reaction has been studied for the first time at an incident energy of 3 MeV delivered by the new ISAC-2 facility at TRIUMF. An active target det…
New Experimental Constraints for the Standard Model from Muon Decay
R. Bayes, J. F. Bueno, A. Hillairet +27
The TWIST Collaboration has completed a new measurement of the energy-angle spectrum of positrons from the decay of highly polarized muons. A simultaneous measurement of the muon d…
Measurement of the Muon Decay Parameter delta
TWIST Collaboration, A. Gaponenko, R. Bayes +45
The muon decay parameter delta has been measured by the TWIST collaboration. We find delta = 0.74964 +- 0.00066(stat.) +- 0.00112(syst.), consistent with the Standard Model value o…
Decay of negative muons bound in Al
A. Grossheim, R. Bayes, J. F. Bueno +25
We present the first measurement of the energy spectrum up to 70 MeV of electrons from the decay of negative muons after they become bound in Al atoms. The data were taken w…
A Precision Measurement of the Muon Decay Parameters and
TWIST Collaboration, R. P. MacDonald, R. Bayes +34
The TWIST collaboration has performed new measurements of two of the parameters that describe muon decay: , which governs the shape of the overall momentum spectrum, and ,…
Gas gain on single wire chambers filled with pure isobutane at low pressure
Yu. I. Davydov, R. Openshaw, V. Selivanov +1
The gas gain of single-wire chambers filled with isobutane, with cell cross-section 12x12 mm and wire diameters of 15, 25, 50 and 100 m, has been measured at pressures ranging…
Precision muon decay measurements and improved constraints on the weak interaction
TWIST Collaboration, A. Hillairet, R. Bayes +28
The TWIST Collaboration has completed its measurement of the three muon decay parameters Ï, δ, and P_μξ. This paper describes our determination of Ï, which governs the shape o…
Detector for measuring the branching fraction
A. A. Aguilar-Arevalo, M. Aoki, M. Blecher +24
The PIENU experiment at TRIUMF is aimed at a measurement of the branching ratio = ${Î\big((Ï^{+} \rightarrow e^{+} ν_{e}) + (Ï^{+} \rightarrow e^{+} ν_{e}γ)\big)}/…
Blind analysis results of the TWIST experiment
A. Hillairet, R. Bayes, J. F. Bueno +28
The TRIUMF Weak Interaction Symmetry Test (TWIST) experiment was designed to test the standard model at high precision in the purely leptonic decay of polarized muons. A general fo…
Measurement of P_{mu}xi in Polarized Muon Decay
TWIST Collaboration, B. Jamieson, R. Bayes +37
The quantity P_{mu}^{pi}xi, where xi is one of the muon decay parameters and is the degree of muon polarization in pion decay, has been measured. The value P_{mu}^{pi}xi…