Measurement of μ + relaxation rates in Al and Mg alloys for the precise μ + transverse polarization experiment TREK at J-PARC

The J-PARC TREK experiment will search for violation of time reversal invariance ( T) in the K + → π 0 μ + ν decay. The transverse muon polarization ( P T ) in stopped kaon decay will be measured with high precision ( 10 - 4 ) . An active polarimeter will be employed to stop muons and to detect deca...

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Veröffentlicht in:	Physica. B, Condensed matter Condensed matter, 2009-04, Vol.404 (5), p.962-965
Hauptverfasser:	Imazato, Jun, Hasinoff, Michael, Shimizu, Suguru, Pywell, Robert, Anderson, Danielle
Format:	Artikel
Sprache:	eng
Schlagworte:	Active muon polarimeter Al and Mg alloys Exact sciences and technology Kaon decay Muon transverse polarization Physics Specific reactions and phenomenology T violation The physics of elementary particles and fields
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Beschreibung
Zusammenfassung:	The J-PARC TREK experiment will search for violation of time reversal invariance ( T) in the K + → π 0 μ + ν decay. The transverse muon polarization ( P T ) in stopped kaon decay will be measured with high precision ( 10 - 4 ) . An active polarimeter will be employed to stop muons and to detect decay positron asymmetry at the same time. The selection of the stopper material is an important issue. In a longitudinal and transverse field μ SR experiment at TRIUMF, the muon spin relaxation rates have been measured for alloys of Al and Mg to find the best candidate stopper material. Almost all the alloys tested showed no significant relaxation.
ISSN:	0921-4526 1873-2135
DOI:	10.1016/j.physb.2008.11.217