Apparatus for a Search for T-violating Muon Polarization in Stopped-Kaon Decays

Abstract

The detector built at KEK to search for T-violating transverse muon polarization in K+ --> pi0 mu+ nu (Kmu3) decay of stopped kaons is described. Sensitivity to the transverse polarization component is obtained from reconstruction of the decay plane by tracking the mu+ through a toroidal spectrometer and detecting the pi0 in a segmented CsI(Tl) photon calorimeter. The muon polarization was obtained from the decay positron asymmetry of muons stopped in a polarimeter. The detector included features which minimized systematic errors while maintaining high acceptance.

56 pages, 30 figures, submitted to NIM

References in corpus (7)

• Observation of CP Violation in K(L)->pi+pi-e+e- Decays
• Time reversal violation in $K^{+}\to {\mu }^{+}\nu \gamma$ decay and three Higgs model
• Transverse Muon Polarization in $K^{\pm }\to {\pi }^0{\mu }^{\pm }\nu$ Decay Induced by the Two-Photon Final-State Interaction
• Supersymmetric Time Reversal Violation in Semileptonic Decays of Charged Mesons
• Analysis of Transverse Muon Polarization in $K^{+}\to {\pi }^0{\mu }^{+}\nu$ and $K^{+}\to {\mu }^{+}\nu \gamma$ Decays with Tensor Interactions
• The supersymmetric prediction for the muon transverse polarization in the $K^{+}\leftarrow {\pi }^0{\mu }^{+}{\nu }_{\mu }$ decay
• Measurement of $\Gamma (K_{\mu 3})/\Gamma (K_{e3})$ ratio using stopped positive kaons

Cited by in corpus (13)

• Flavour physics of leptons and dipole moments
• Experiments with K-Meson Decays
• A new limit of T-violating transverse muon polarization in the $K^{+}\to {\pi }^0{\mu }^{+}\nu$ decay
• Fabrication of silica aerogel with $n$ = 1.08 for $e^{+}/{\mu }^{+}$ separation in a threshold Cherenkov counter of the J-PARC TREK/E36 experiment
• Measurement of K^+ \to π^0 μ^+ νγdecay using stopped kaons
• Measurement of $K^{+}\to {\pi }^0{\pi }^0{e}^{+}\nu$ ($K_{e4}^{00}$) decay using stopped positive kaons
• The design and basic performance of a Spiral Fiber Tracker for the J-PARC E36 experiment
• New result on the measurement of the direct photon emission in K+ --> pi^+ pi^0 gamma decay
• Assembly and bench testing of a spiral fiber tracker for the J-PARC TREK/E36 experiment
• New determination of the branching ratio of the structure dependent radiative $K^{+}\to e^{+}{\nu }_e\gamma$ decay
• Form factors of the Kmu3 decay in the spectator approximation of the Standard Model
• Precise measurement of the $K_{e2}/K_{\mu 2}$ branching ratio and search for new physics beyond the Standard Model
• New search for T-violation in the decays of the charged kaon